EP0043441B2 - Process and apparatus for making a woven seam between two ends of a fabric - Google Patents

Abstract

The end portions to be connected are arranged opposite one another, after at least some of the web weft threads have been removed therefrom to form a tying strip interconnecting the ends of the web warp threads in their original order. The web warp threads are gradually released from the tying strip, spatially separated, on an individual basis and in their original order, from the following web warp threads and delivered to the entrance of the then open seam loom shed formed in seam warp threads positioned intermediate the points of emergence of the web warp threads out of the original web. Thereafter, the separated threads are caused to traverse, as seam weft threads, the respectively associated seam shed produced by a Jacquard seam loom, this traversing movement being accomplished by a clamping arrangement arranged at the free end of a floating arm. A seam loom slay of a needle arrangement shifts the introduced seam weft thread into its proper position in the seam and the respective seam loom shed is then closed to detain the seam weft thread in this position. The separator may include a plurality of alternating thicker and thinner, smaller and larger, disks which form an arcuate helical groove at the periphery of the separator, or it may include a plurality of radially extending needles.

Description

The invention enters a method and an apparatus for creating a woven seam for connecting two open fabric ends, in particular for the purpose of producing an endless fabric tape, for. B. for the paper industry. Such a method is known in which the fabric ends are partially frayed, a weave strip is formed, which is partially separated from the overall fabric and connected to it only via the original warp threads, now weft threads, in which the now weft threads are bound by auxiliary warp threads and thereby by the predetermined order of the now weft threads is maintained in the weaving process, a sewing shed is formed from the removed weft threads of the fabric ends, into which the uncovered original warp threads of the fabric ends are inserted as current weft threads and the now weft threads are pushed onto the weave seam and integrated by forming a new seam weaving shed .

So far, the creation of such woven seams has largely been carried out by hand, over the entire width of the fabric tape and in a length of approx. 100 to 200 mm frays the weft threads and weaves the weft threads of one end of the fabric band as warp threads into the other end of the fabric band.

Since the distance between the individual warp threads is usually very small - sometimes less than 0.1 mm - weaving in by hand is tedious and lengthy. In particular, it is very difficult for the seam weaver to securely grasp the next thread. Thread by thread he has to make sure that he has actually got the right thread. If, for example, he has grasped the thread after the next one and has woven it in again, a so-called cross lay occurs, which makes the entire fabric worthless and must be removed in a laborious repair process. In practice, weaving back and eliminating backstrokes means that many hours of work are lost.

The entire manual process when weaving a woven seam together on an 8 m fabric tape made of 0.18 mm threads (35 threads per cm) takes an average of approx. 600 working hours. In addition, this seam weaving requires careful training (2 years of training) and can only be done by people of great skill and dexterity. The seam weaving process demands a great deal of concentration from the seam weavers and also strains the eyes and the general state of health, which is particularly affected by the forced poor posture. Back pain and intervertebral disc damage are part of everyday working life for seam weavers.

Because of the special requirements and the long training period, which in practice often extends well into actual seam weaving - the number of seam weavers - many seam weavers only give up after they have worked for months after completing their training period - is extremely elitist. The remuneration of the seam weavers is therefore much higher than the remuneration of the skilled workers who are otherwise employed in weaving technology.

This illustration clearly shows that the cost of a woven seam of the type described is extremely high. Due to the high cost of the woven seams, extensive stockkeeping is unreasonable for the paper industry, not least because the length, structure and mesh size are often required differently from case to case. On the other hand, the weaving industry is not always able to deliver new fabric tapes at short notice. In addition to the long delivery times caused by work, there are special training and other personnel requirements for seam weavers, which cannot be easily replaced by other personnel. Is a suture weaver z. B. sick or on vacation, the process is inevitably slower.

For the paper industry, the question of delivery time arises from the pure question of cost: if a new fabric tape is required at short notice, it may be that it is not available at short notice. Production in the paper mill in question must then either be changed over or shut down at all until the new fabric band is available.

Understandably, the industry has made many efforts to mechanize the seam weaving process described, but so far without success. Devices have been created only for the stretching of the fabric and for the formation of the seam weaving compartments, by means of which the manual work has been facilitated, cf. Haslmeyer "TextilPraxis", 206/1972. But even these devices have not been able to remotely eliminate the disadvantages of manual work described above. The number of working hours listed above, for example, is already related to the use of the devices mentioned.

The object of the invention specified in claims 1 and 8 is to mechanize and automate the seam weaving process described at the outset, so that it can be carried out effortlessly by all textile workers without special training. Woven seams should be able to be created reliably for all types of fabric in question, without the occurrence of cross folds and other weaving errors.

A special needle roller can preferably insert the weft thread in the seam weaving compartment instead of the weaving sley. The given weaving order of the now weft threads, originally warp threads, can be connected to one another by gluing, soldering or welding the threads to be woven in each case on their outer edges and is thereby retained. It can also be ensured by weaving in auxiliary warp threads that are foreign to the fabric at the outer edges of the weft threads, originally warp threads, which now protrude from the fabric.

In a preferred embodiment of the invention, the thread to be woven in is picked up and guided by means of an air stream.

After each compartment change, a cutting device aligned against the woven seam can move into the open seam weaving compartment and cut off the respective weft thread or the respective thread pair individually or together. The now warp threads, originally weft threads, can be raised in three stages and, consequently, two compartments can arise at the same time, through which a weft thread is passed, but in the opposite direction.

Each separator can be thread-like composed of a series of alternately thinner and thicker disks plugged onto a common separator shaft, in that the thicker disks have a thickness which corresponds to the thickness of the threads to be interwoven, and the diameter difference between the thicker and the thinner disks is sufficient in order to take up the structure of the threads to be woven between each pair of discs, the first disc viewed against the weaving direction serving as the run-in disc and the last disc viewed in the same direction serving as the output disc and both the thinner discs and the thicker discs being cut laterally and pre-bent in a thread-like manner . In a simpler embodiment, each separator can only have a single thicker disk, which is clamped between a ring provided with a metric thread on its surface, the inlet disk and the outlet disk. However, each separator is preferably composed of a wind tunnel consisting of aerodynamically shaped guide plates and an air nozzle projecting into the latter, the air flow generated by the air nozzle, deflected in the wind tunnel, acting as a gripper and guide of the weft thread to be woven in in each case. With difficult tissue structures, e.g. B. double-layer fabrics, metal fabrics and the like, the weft thread released from the weave of the web can be picked up by a rotating in the cycle of the weaving process and equipped with at least one separator needle, the separator needle picks up the weft thread and separates it from the other weft threads.

In a particularly favorable embodiment of the invention, the weft thread to be woven is picked up by a tubular plug-in arm that is controlled in the course and in the rhythm of the seam weaving process, can be swung out on a two-leg swivel arm and can be moved back and forth through the seam weave compartment formed, in the tube interior of which at least one on his Free end of kinked and attached to the swivel arm steel wire is slidably arranged relative to the plug-in arm and clamps between the bent part and the open tube end of the plug-in arm, the weft thread to be woven in and releases the weft thread after pulling out in the cycle of the seam weaving process and swiveling the plug-in arm .

The insertion of the individual weft in the seam weaving compartment is preferably carried out by a rotatably mounted in the frame and step by step, for. B. by a stepper motor driven needle roller, on the rotating shaft of two opposite: consisting of a plurality of flexible needles rows of needles are arranged helically such that the helix of one row of needles is right-handed and that of the second row of needles is left-handed. However, the addition can also be done by means of approximately right-angled z. B. Z-shaped needles take place, which are arranged parallel to each other and longitudinally displaceable on a guide bed, protrude at one end into a curved groove of a backdrop that can be moved back and forth in the cycle of the weaving process, reach into the seam weaving compartment with the bent free needle part and there one executes the slide-in movement corresponding to the curve shape of the curve groove.

An exemplary embodiment of the invention is illustrated and explained below using the figures.

Show it:

• 1 an overall view of the seam weaving machine according to the invention, consisting of two machine halves and a jacquard machine, mounted on a common frame, in a perspective view,
• 2 shows the seam weaving machine FIG. 1, schematically and in a top view, but without a jacquard machine,
• 3 shows the section A-A of FIG. 2,
• 4 the disc separator (partial view) in a side view,
• 5 shows the section B-B of Fig. 4,
• 6 the inlet disk (left picture), the thicker separator disk (middle picture) and the thinner separator disk (right picture),
• Fig. 7 is a schematic diagram of the disc separator Fig. 4, the function of Showing the disc separator in the fabric stretching, in a perspective view, the special image in the left circle showing the structure of the normal fabric and the image in the right circle showing a binding point of a pair of weft threads in the woven seam (greatly enlarged),
• 8 shows the arrangement of a sley in the frame of the seam weaving machine, schematically and in perspective view,
• 9 shows a shorter disk separator with auxiliary lifting elements, consisting of only three separator disks and a metric thread, schematically and in perspective (the special figures in the circles as described in FIG. 7),
• 10 shows an air nozzle of an airflow separator with auxiliary lifting elements, schematically and in perspective (special figures as in FIG. 7).
• FIG. 11 shows a schematic top view of the entire seam weaving machine with the wind channels on both sides which deflect the respective air flow three-dimensionally (the air nozzle FIG. 10 is not visible); the fabric cutouts drawn on both sides indicate the overall fabric to be woven, which would make the presentation of the machine unclear,
• 12 shows the section C-C of FIG. 11, the air nozzle FIG. 10 and the guide plates of the wind tunnel FIG. 11 in context,
• 13 shows a schematic diagram of the seam weaving point with a needle separator, schematically and in perspective view,
• 14 is a side view of a gripper arm for picking up and passing the weft thread through the seam weaving compartment,
• 15 the gripper arm FIG. 14 in a top view,
• 16 the gripper arm FIG. 14 seen from the rear,
• 17 is an enlarged view of the front end of the gripping arm FIG. 14 with steel wires (gripping wires) in the open position,
• 18 the swivel arm part of the gripping arm FIG. 14, in an enlarged side view and partly in section,
• 19 shows the two bent and kinked steel wires of the gripper arm, enlarged,
• 20 the front end of the gripper arm with plastic plugs, enlarged and in a longitudinal section,
• 21 a needle roller for pushing in the weft threads in the seam weaving compartment, enlarged and in a perspective view,
• 22 the partial view of a guide bed with a Z needle and the associated stepping motor, showing the insertion of a weft thread in the seam weaving compartment, partly in section,
• 23 shows the curve that controls the movement of the Z needle,
• 24 is a partial view of the guide bed FIG. 22 in a plan view and partially in section,
• 25 the cross plates and spacer sleeves of the guide bed FIG. 22,
• 26 is a top view of a guide element mounted in the guide bed for the link guide rods,
• 27 the curve backdrop FIG. 23 with deflection roller, in a side view,
• 28 shows a schematic diagram of two jacquard machines interacting via a summing roller with a cord connected to the axis of rotation of the summing roller and fastened to the frame of the seam weaving machine via a deflecting roller and via a tension spring and receiving the main lifting element,
• 29 is a schematic diagram of a double seam weaving compartment formation, schematically and in perspective view,
• 30 shows a cross section through a woven seam formed in the double seam web formation (enlarged),
• 31 is a view of the cutting and bending device for cutting and bending the run-in disks, the thinner disks and the thicker disks, FIG. 6.

• M obere Maschinenhälfte
• M' untere Maschinenhälfte
• G Gestell
• 1 Trageprismen für das Gestell
• 2 Führungsschienen für das Gestell
• 3 Schrittmotor für das Gestell G
• 4 Textilbahn
• 5 Jacquardmaschine
• 6 Weblade
• 7 Gewebe
• 8 Kettfäden (ursprünglich Schussfäden)
• 9 Aufspannvorrichtung
• 10 Schussfäden (ursprünglich Kettfäden)
• 11 Nahtwebfächer
• 12 Schussfaden, zur Einwebung anstehend
• 13 Webnaht
• 14 Scheibenseparator
• 15 Separatorwelle
• 16 Einlaufscheibe
• 17,18 Gewindeteil, bestehend aus dünnen Scheiben 17 und dicken Scheiben 18
• 19 Auslaufscheibe
• 20 Schneide- und Biegeeinrichtung
• 21 Führungsstangen am Separator 14
• 22 Bund der Separatorwelle 15
• 23 Aufspannring
• 24 Aufspannmutter
• 25 Schrittmotoren der Scheibenseparatoren 14
• 26 Einschnittin den Scheiben 16 bis 18
• 27 Messerschneide an der Einlaufscheibe 16
• 28 erste Schussfadenführung
• 29 zweite Schussfadenführung
• 30 besonderer Gewindegang an der Auslaufscheibe 19
• 31 Einfräsung an der Auslaufscheibe 19
• 32 Greifer
• 33 Schrittmotoren für die Greifer 32
• 34 Ausleger an den Führungsstangen 35
• 35 Führungsstange
• 36 Schrittmotoren für die Führungsstangen 35
• 37 Gewebeführung
• 38 zusätzliche Bindung der Schussfäden 10 "Webstreifen" genannt
• 39 thermische Schneideeinrichtung am Gestell G
• 40 Passfeder
• 41 Verzahnung an den Führungsstangen
• 42 Zahnräder Schrittmotor-Führungsstange
• 43 Steckarm am Gestell G
• 44 Schussfadenklemmeinrichtung am Steckarm 43
• 45 Verzahnung der Steckarme 43
• 46 Schrittmotoren der Steckarme 43
• 47 Schrittmotoren für Weblade
• 48 Schrittmotoren für Aufwickelrollen 49
• 49 Aufwickelrollen für abfallenden Webstreifen 38
• 50 Klemmeinrichtung für Webstreifen 38
• 51, 52 Zahnverbindung Gestell G - Aufspannvorrichtung 9
• 53 einfacher Scheibenseparator
• 54 Ring des Scheibenseparators 53
• 55 metrisches Gewinde am Ring 54
• 56 Hilfskettfäden vom Webstreifen 38
• 57 Hilfs-Hubelemente an der Jacquardmaschine 5 angelenkt
• 58 Luftdüse zum Separieren und Führen des Schussfadens 10
• 59 Webstreifenführung
• 60, 61, Leitbleche (Windkanal) für die Führung
• 62 des Luftstrahls
• 63 Hilfsfach, aus Hilfskettfäden 56 gebildet
• 64 Magnetventil der Luftdüse 58
• 65 Luftzufuhrleitung für die Luftdüse 58
• 66 Gewicht
• 67 Seil
• 68 Abwickelrolle
• 69 Umlenkrolle
• 70 Nadelseparator
• 71 Stahlnadeln am Nadelseparator 70
• 72 Sacklochbohrung im Schiebeelement 74
• 73 durchgehende Gewindebohrung im Schiebeelement 74
• 74 Schiebeelement
• 75 Führungsrohr am Schwenkarm 76
• 76 Schwenkarm
• 77 Längsnut im Schwenkarm 76
• 78 Bolzen am Schiebeelement 74
• 79 Grundplatte verbunden mit Zahnstange 45
• 80 Mutter
• 81 Bolzen an Grundplatte 79
• 82 Zugfeder
• 83 Bolzen im Schwenkarm 76
• 84 Bolzen an der Grundplatte 79
• 85 Anschlagbolzen an der Grundpaltte 79
• 86 Innengewinde im Führungsrohr 75
• 87 Druckfeder im Führungsrohr 75
• 88 Mutter zum Sichern des Gewindestiftes 89
• 89 Gewindestift im Führungsrohr 75
• 90, 91 Stahldrähte, die die Schussfadenklemmeinrichtung 44 bilden
• 92 Klemmplättchen für die Stahldrähte 90, 91
• 93 Kunststoffstopfen im Steckarm 43
• 94 Zahnstangenführung für Zahnstange 45
• 95 Gewinde am Anschlag 98
• 95 Dämmaterial am Anschlag 98
• 97 Mutter zur Sicherung des Anschlags 98
• 98 Anschlag
• 99 vorderer Anschlagbolzen in Grundplatte 79
• 100 Nadelwalze
• 101 Welle der Nadelwalze 100
• 102 Nadeln der Nadelwalze 100
• 103 Schrittmotor der Nadelwalze 100
• 104 Z-Nadeln
• 105 Führungsbett
• 106 Grundplatte des Führungsbettes 105
• 107 Führungsstangen des Führungsbettes 105
• 108 Bohrungen der Bleche 107
• 109 Bleche des Führungsbettes 105
• 110 Abstandshülsen am Führungsbett 105
• 111 Kulisse am Führungsbett 105
• 112 Nut in der Kulisse 111
• 113 Führungsstangen der Kulisse 111
• 114 Druckfeder am Schiebeelement 115
• 115 Schiebeelement
• 116 Zahnriementrieb für die Kulisse 111
• 117 Schrittmotorfür die Kulisse 111
• 118 Rolle an Kulisse 111
• 119 Schnüre der Jacquardmaschine 5
• 120 Summierrolle
• 121 Drehachse der Summierrolle 120
• 122 Schnur der Drehachse 121
• 123 Haupthubelement
• 124 Umlenkrolle für Schnur 122
• 125 Zugfeder
• 126 zweite Jacquardmaschine
• 127 gemeinsame Drehwelle der Jacquardmaschinen 5 und 126
• 128 Schnüre der Jacquardmaschine 126

The reference numbers given on the figures indicate:

• M upper machine half
• M 'lower machine half
• G frame
• 1 carrying prisms for the frame
• 2 guide rails for the frame
• 3 stepper motor for frame G
• 4 textile web
• 5 jacquard machine
• 6 drawer
• 7 tissues
• 8 warp threads (originally weft threads)
• 9 clamping device
• 10 weft threads (originally warp threads)
• 11 seam compartments
• 12 weft threads, ready for weaving
• 13 woven seam
• 14 disc separator
• 15 separator shaft
• 16 washer
• 17, 18 threaded part, consisting of thin washers 17 and thick washers 18
• 19 outlet disc
• 20 cutting and bending device
• 21 guide rods on the separator 14
• 22 collar of the separator shaft 15
• 23 clamping ring
• 24 clamping nut
• 25 stepper motors of the disc separators 14
• 26 incision in washers 16 to 18
• 27 Knife edge on the inlet disk 16
• 28 first weft guide
• 29 second weft guide
• 30 special thread on the outlet disc 19
• 31 Milling on the outlet disc 19
• 32 grippers
• 33 stepper motors for the grippers 32
• 34 Booms on the guide rods 35
• 35 guide rod
• 36 stepper motors for the guide rods 35
• 37 tissue guide
• 38 additional binding of the weft threads 10 called "woven strips"
• 39 thermal cutting device on frame G
• 40 feather key
• 41 teeth on the guide rods
• 42 gears stepper motor guide rod
• 43 plug-in arm on frame G
• 44 weft thread clamping device on plug-in arm 43
• 45 Interlocking of the plug-in arms 43
• 46 stepper motors of the plug-in arms 43
• 47 stepper motors for the sley
• 48 stepper motors for take-up reels 49
• 49 take-up rolls for sloping woven strips 38
• 50 clamping device for woven strips 38
• 51, 52 toothed connection frame G - clamping device 9
• 53 simple disc separator
• 54 Ring of the disc separator 53
• 55 metric thread on ring 54
• 56 auxiliary warp threads from the woven strip 38
• 57 auxiliary lifting elements articulated on the jacquard machine 5
• 58 Air nozzle for separating and guiding the weft 10
• 59 woven strip guide
• 60, 61, guide plates (wind tunnel) for guidance
• 62 of the air jet
• 63 auxiliary compartment, formed from auxiliary warp threads 56
• 64 Air valve solenoid 58
• 65 Air supply line for the air nozzle 58
• 66 weight
• 67 rope
• 68 unwinding roll
• 69 pulley
• 70 needle separator
• 71 steel needles on needle separator 70
• 72 blind hole in sliding element 74
• 73 continuous threaded hole in the sliding element 74
• 74 sliding element
• 75 Guide tube on the swivel arm 76
• 76 swivel arm
• 77 Longitudinal groove in the swivel arm 76
• 78 bolts on sliding element 74
• 79 Base plate connected to rack 45
• 80 mother
• 81 bolts on base plate 79
• 82 tension spring
• 83 bolts in the swivel arm 76
• 84 bolts on the base plate 79
• 85 stop bolts on the base slot 79
• 86 internal thread in the guide tube 75
• 87 compression spring in the guide tube 75
• 88 nut for securing the set screw 89
• 89 Grub screw in the guide tube 75
• 90, 91 steel wires that form the weft thread clamping device 44
• 92 clamping plates for steel wires 90, 91
• 93 plastic plugs in the plug-in arm 43
• 94 Rack guide for rack 45
• 95 thread at the stop 98
• 95 insulation material at the stop 98
• 97 nut for securing the stop 98
• 98 stop
• 99 front stop pin in base plate 79
• 100 needle roller
• 101 needle roller shaft 100
• 102 needles of the needle roller 100
• 103 stepper motor of the needle roller 100
• 104 Z needles
• 105 guide bed
• 106 Base plate of the guide bed 105
• 107 guide rods of the guide bed 105
• 108 holes in the sheet 107
• 109 sheets of the guide bed 105
• 110 spacers on the guide bed 105
• 111 backdrop at the guide bed 105
• 112 groove in the backdrop 111
• 113 guide rods of the backdrop 111
• 114 compression spring on sliding element 115
• 115 sliding element
• 116 timing belt drive for the backdrop 111
• 117 stepper motor for the backdrop 111
• 118 Role on backdrop 111
• 119 cords of the jacquard machine 5
• 120 summing roll
• 121 axis of rotation of the summing roller 120
• 122 Cord of the axis of rotation 121
• 123 main lifting element
• 124 pulley for cord 122
• 125 tension spring
• 126 second jacquard machine
• 127 common rotary shaft of jacquard machines 5 and 126
• 128 cords of the Jacquard machine 126

The seam weaving machine according to the invention consists of two opposing mirror-image and otherwise identical machine halves M, M '. As a result, the elements of this machine half are each provided with the same reference number, the reference number of the half shown in FIG. 2 being provided with a dash. In the following description of the machine half M, M ', only the one element in question is described and numbered; the description and numbering automatically apply to the same element of the other machine half.

The two machine halves M, M 'are connected to one another via a common frame G. The Getell G is slidably mounted on guide rails 2 on guide rails 2 and can be moved by means of a stepping motor 3 from one end of a textile web 4 to the other end, normally 4 to 8 m. Both machine halves M, M 'have in common a jacquard machine 5 fastened to the frame G and a sley 6.

The fabric ends of a fabric 7 to be woven together are stretched to the right and left of the clamped warp threads 8 onto a tensioning device 9. On this clamping device 9 is the frame G with the two machine halves M, M 'and Jacquard machine slidably mounted. The fabric ends are clamped in such a way that the corresponding weft threads 10 (warp threads in the previous weaving process) of one fabric end lie opposite the weft threads 10 'of the other fabric end. The seam weaving compartments 11 to be formed one after the other are formed with the jacquard machine 5. The weft thread 12 to be woven is inserted into the corresponding seam weaving compartment 11 with the aid of the seam weaving machine M, M 'according to the invention, pushed in with the sley 6 and integrated by forming a new seam weaving compartment 11' corresponding to the seam weaving process. The weft thread 12 'to be woven is introduced into this newly formed seam weaving compartment 11' with the aid of the seam weaving machine M ', M, pushed in with the sley 6 and integrated by forming a new seam weaving compartment 11. This sequence of operations of inserting the weft threads 12, 12 'which are respectively to be woven in with the aid of the seam weaving machine M, M' into the correspondingly successively formed seam weaving compartments 11, 11 'is repeated until the weave seam 13 is completed.

The symmetrical halves M, M 'of the seam weaving machine shown in FIGS. 2 and 3 are constructed symmetrically to the weave seam 13. In this seam weaving machine, weft threads 12, 12 'are spatially separated with the aid of disk separators 14. The workflow is identical on the right and left side of the seam weaving machine M, M '.

Each disk separator 14 rotatably mounted in the frame G, shown in FIGS. 4 and 5, essentially consists of a separator shaft 15, an inlet disk 16, a threaded part 17, 18 and an outlet disk 19. The threaded part 17, 18 consists of individual disks of different thickness and outside diameter, the thinner disks 17 having a larger diameter and the thicker disks 18 having a smaller diameter. The thickness of the washers 18 is dependent on the diameter of the weft threads 10 to be processed, and the thickness of the larger washers 17 is dependent on the spacing of the individual warp threads, now weft threads 10, in the fabric 7 from one another. The difference in diameter between the thinner and thick washers 17, 18 must be so large that the weft threads 10 structured by the weaving process fit into the individual threads of the thread formed from the washers 17, 18 without deformation of the structure.

The thread-like structure 17, 18 arises from the fact that the individual disks 17, 18 are correspondingly cut and pre-bent at their outer edges. This deformation of the disks 17, 18 can take place by means of a cutting and bending device 20, which can be seen in FIG. 31. In the course of the assembly of the disks 16 to 19 on the separator shaft 15, a thread is thus created, on which the weft threads 10 individually drawn in by the inlet disk 16 are transported only in a certain rotational range of the disk separator 14. So that such a thread-like structure can be achieved, the individual disks 16 to 19 must be attached to the separator shaft 15 and additionally to the guide rods 21 in the following manner.

First comes the outlet disk 19, which is supported on a collar 22 of the separator shaft 15. Following the outlet disk 19 comes first a thick disk 18, then a thin disk 17, etc. So many thin and thick disks 17, 18 are pushed onto the separator shaft 15 and respective guide rod 21 in the order described until the required thread length is reached is. Finally, the inlet disk 16 is pushed onto the separator shaft 15 and guide rods 21. After the individual disks 16 to 19 have been placed on the separator shaft 15, they are clamped against the collar 22 formed on the separator shaft 15 by means of a clamping ring 23 and a clamping nut 24. The desired transport of the weft threads 10 takes place on this thread-like structure 16 to 19 in a certain rotational range. One of the guide rods 21 is flattened on a surface line and lies with the flattened side against the separator shaft 15, cf. Fig. 5. This measure serves the purpose of always ensuring that the thread pitch is always the same.

The shape of the face milling on the clamping ring 23 and the outlet disk 19 depends on the required thread pitch and direction of the pitch and thus again on the diameter of the weft threads 10 and the direction of rotation of the disk separator 14.

The disc separator 14 of the machine half M makes a clockwise rotation limited to 360 ° and then intermittent, while the disc separator 14 'carries out the same counterclockwise rotation, as seen in the weaving direction. This rotary movement, which interrupts after one revolution, is generated by a stepper motor 25 (FIG. 2). The respective direction of inclination of the thread-like structure 16 to 19 on the disk separator 14 is achieved by corresponding milling on the face side on the clamping ring 23 and the outlet disk 19 and by corresponding cutting and pre-bending of the disks 16, 17, 18. The pitch direction of the thread on the outlet disk 19 corresponds to the pitch of the remaining thread 16 to 18.

The individual pulling in of the weft threads 10 onto the disk separator 14 is achieved in that the incision 26 made by the cutting and bending device 20 provided washer 16 is exactly the same as the thin washers 17 of the thread-like structure 17, 18, with the only difference that a segment is cut off from the incision 26 on the washer 16 parallel to this incision 26 (shown in FIG. 6) ), so that a kind of knife edge 27 is created. This measure interacts with a first weft thread guide 28 responsible for the entry of the weft threads 10 and with a second weft thread guide 29 serving for the exit. Each weft guide 28, 29 consists of a bar provided with a knife edge aligned against the separator 14, which can be displaced both vertically and axially, the first weft guide 28 being longer than the second weft guide 29, while the first weft guide 28 around the outlet side a length dimension that exactly corresponds to the width of the outlet disc 19. These devices and the fact that the inlet disk 16 is at a predetermined distance from the first of the thinner disks 17 (the disks with a larger diameter) means that only one weft thread 10 per revolution (360 °) of the disk separator 14 is drawn onto the latter can be.

The outlet disk 19 located at the end of the thread-like structure 16 to 18 is designed in such a way that the weft thread 12 to be woven is spatially separated from the weft threads 10 still located on the threads. This spatial separation takes place in the axial direction by means of a special thread 30 cut on the outlet disk 19 with a large pitch. Furthermore, a milling 31 (FIGS. 3 and 7) on the circumference of the outlet disk 19 enables the weft thread 12 to be taken over by a gripper 32 (FIGS. 2 and 3). This gripper 32 is designed like a crank (FIG. 2); his crank member is swung out by a stepper motor 33 in the cycles of the weaving process. The stepping motor 33 is fastened to a cantilever 34 of a guide rod 35 which can be displaced longitudinally axially on the frame G and which is moved back and forth in the weaving direction in the rhythm of the weaving process. The longitudinal displacement of the guide rod 35 takes place by means of a further stepping motor 36.

As a result of the combined rotation and displacement movement, the free end of the gripper 32 describes a spatial curve which it spends from the outlet disk 19 to the entrance of the respective seam weaving compartment 11.

A fabric guide 37 made of sheet metal is arranged on each half of the machine, by means of which both fabric ends of the fabric 7 are opened against one another in a funnel-shaped or conical manner and are thus prepared for the separation of the weft threads 10.

The arrangement of the disk separator 14, which is rotatably mounted in the frame G, and the fabric guide 37 (see FIG. 7) ensure that the knife edge 27 (FIG. 6) on the inlet disk 16 directly at the foot of the protruding from the fabric 7 and with a the additional weave 38 (FIG. 2, also FIG. 7), which has come about as a result of the partial weaving described above, engages weft threads 10 provided on the outer edge. As a result of the further transport of the weft threads 10 individually drawn in by the run-in disk 16 on the thread-like structure 16 to 18, the fabric guide 37 and the relative movement when the seam weaving machine M is advanced with respect to the clamped fabric 7, the foot of the weft yarns 10 is always further away from the disk separator 14 wanders away. This is necessary so that the additional binding 38, which is formed on the weaving strip, on the outer edge of the weft threads 10 woven out as former warp threads with the aid of a thermal cutting device 39 (FIGS. 2, 3 and 7) that is firmly connected to the frame G (FIGS. 2, 3 and 7) 10 in the event of any interlocking by combing through to the outer end of the weft threads 10. The thermal cutting device 39 is generally known in weaving technology and is therefore not described further here.

This procedure enables the weft threads 12 to be woven in to be clamped at their front ends by the respectively assigned gripper 32 (FIG. 1). The grippers 32 are guided on the space curve described above in such a way that the respective front end of the respective weft thread 12 clamped by the associated gripper 32 is brought past the disk separator 14 and the first weft thread guide 28 at the level of the respective seam weaving compartment 11.

A turning of the guide rods 35 is prevented by means of keys 40. At the rear end of each guide rod 35 a set of teeth 41 is attached. By means of a controlled reversing rotary movement of each stepping motor 36 and by transmission of this rotary movement via toothed wheels 42, which engage in toothings 41 of the guide rods 35, these perform a defined movement in the axial direction of the disk separators 14. The rotary movements of the stepper motors 33 and 36 are coordinated.

The front end of the weft thread 12, which is brought to the level of the corresponding seam weaving compartment 11 with the aid of the gripper 32, is taken over by a plug-in arm 43 'which is displaceably and non-rotatably arranged on the frame G with a weft thread clamping device 44' and is pulled through the seam weaving compartment 11. The plug-in arm 43 'must be located within the cavity formed by the fabric 7 to be woven, because otherwise the insertion of the plug-in arm into the seam weaving compartment 11 would not be spatially possible. When the second weft thread 12 'is passed through the corresponding seam weaving compartment 11' from the opposite machine half M ', the plug-in arm 43 with the weft thread clamping device 44 takes over the weft thread 12' from the gripper 32 'and pulls it through the seam weaving compartment 11'. With a corresponding design of the weft thread clamping devices 44, it is also possible to push the weft thread 12 with the plug arm 43 only up to the middle of the weaving shed 11, where the weft thread is then taken over by the plug arm 43 'of the machine half M' and finally pulled through the seam weaving shed 11. The weft thread 12 'is then passed through the corresponding seam weaving compartment 11' in the same way.

Each plug arm 43 is provided with a toothing 45; the required straight-line oscillating movement takes place via the toothing 45 in that, as already mentioned, the plug-in arms are mounted in the frame G such that they can rotate and are driven by stepper motors 46 which perform reversing movements.

The weft threads 12 each inserted into the corresponding seam weaving compartments 11 are pushed with the weaving drawer 6 onto the weaving seam 13 that has already been completed.

The sley 6 is rotatably mounted in the frame G and is driven by a stepper motor 47, as shown in FIG. 8.

The weaving strips 38 separated from the weft threads 10 by the thermal cutting devices 39 are wound onto the winding rollers 49 with the aid of the stepping motors 48. The woven strips 38 still connected to the weft threads 10 are firmly connected to the clamping device 9 at the end of the clamping device 9 by means of clamping devices 50.

As already mentioned at the beginning, the frame G is displaceably mounted on guide rails 2 and is displaced from one end of the fabric band to be woven to the other end during the weaving process. This shift takes place step by step, namely in the cycle of the seam weaving process, in that the frame G is moved step by step by the stepping motor 3 via a tooth connection 51, 52.

The stepper motors

• 3 for the frame G
• 25 for the disc separators 14
• 33 for the grippers 32
• 36 for the guide rods 35
• 46 for the plug arms 43
• 47 for the drawer 6
• 48 for the winding rollers 49

are connected to the jacquard machine 5 via a logic circuit (not shown) and carry out their method steps in the cycle of the jacquard machine, a series of intermediary sensors (not shown) controlling the entire workflow in a manner known otherwise.

The disk separator 14 described here takes up a number of weft threads 10 in the course of the separation in the manner of a memory. Because the disk separator 14, which is driven by the stepping motor 25, rotates step by step in the cycle of the weaving process, the separated weft threads 10 travel over the thread-like disks 16 to 18 from the inlet disk 16 to the outlet disk 19, where - as already described - the weft yarn 12 arriving there is picked up by the gripper 32.

Because of the complex production of such a separator 14 composed of many disks 17, 18 (1000-1200 disks on average), this separator can only be used economically for fabrics with equally strong fabric threads. However, if the thread thickness changes from tissue operation to tissue operation, a simpler disk separator 53 must be used for economic reasons. This consists of a ring 54, on the outer surface of which a metric thread 55 corresponding to the direction of rotation of the disk separator is cut, as well as an inlet disk 16, a single thicker disk 18 and an outlet disk 19. The inlet disk, thicker disk and outlet disk are designed as in the previous embodiment described. The metric thread 55 on the ring 54 has the task of preventing the weft threads 10 from being taken along in the feed direction of the seam weaving machine during the advancement of the seam weaving machine and thus the weft thread 10 not always being drawn in by the run-in disk 16 onto the disk separator 53. The basic arrangement of the disk separator 53 in the seam weaving machine is shown in FIG. 9. The release of the weft thread 12 to be woven in from the binding of the weaving strip 38 is achieved by correspondingly raising and lowering auxiliary warp threads 56 by means of auxiliary lifting elements 57 articulated on the jacquard cords, which are controlled by the jacquard machine 5. The released weft thread 12 is spatially separated from the weft thread 10 with the aid of the outlet disk 19.

Both disc separators 14, 53 require extremely precise guidance of the fabric to be woven in relation to the seam weaving machine, approximately in the order of magnitude of 0.1 mm, both in the individual step from thread to thread and in the sum of the process steps from the beginning of the fabric band and up to it The End. This means that the seam weaving machine must be able to handle the individual step errors at all times to cancel each other out, a requirement that can only be met by means of complex sensor technology.

In a simpler and less demanding embodiment of the seam weaving machine, the spatial separation of the weft threads and their subsequent guiding down to the respectively formed compartment is accomplished by an air flow coming from an air nozzle 58 (FIG. 10). The weft thread 10 integrated in the woven strip 38 is brought together with the woven strip from a woven strip guide 59 to the air nozzle 58, the woven strip 38 being brought out of its original vertical position into an approximately horizontal position.

The air nozzle 58 blows into a wind tunnel formed from three aerodynamically shaped guide plates 60, 61, 62 (FIGS. 11 and 12). As a result of the rotation of the weaving strip 38 about its longitudinal axis and due to the opening of the auxiliary compartment 63 formed from the auxiliary warp threads 56 by means of the auxiliary lifting elements 57, a tensioning occurs, through which the respective weft thread 12 springs out of the weaving order. The weft thread 12 which has jumped out is picked up by the air stream and guided through the wind tunnel 60, 61, 62 until its front end reaches before the opening of the main compartment (seam weaving compartment) 11 which has just been formed in the same work cycle. Here the plug-in arm 43 'described above grips it with its weft thread clamping device 44' and pulls it through the seam weaving compartment 11. The further procedure takes place as in the first exemplary embodiment.

The air nozzle 58 is integrated in the woven strip guide 59 in order to save space. It is connected to an air supply line 65 via a solenoid valve 64. The solenoid valve 64 is controlled by sensors (not shown) which signal the point in time at which the plug arm 43 'begins its working stroke.

As already described at the beginning, the woven strip 38 is fastened to the clamping device 9 outside the seam weaving machine. During the operations of weaving the fabric ends together, the weaving strip 38 stands still while the frame G moves with the seam weaving machine.

The derogatory auxiliary warp threads 56 of the web strip 38 are wound onto the winding roller 49. Since the respective web strip 38 must be guided exactly from thread to thread relative to the seam weaving machine when disc separators 14, 53 are used, it is absolutely necessary that the take-up roll 49 is stretched exactly in time with the seam weaving method, which controls the driving stepper motor very precisely 48 requires.

This is not necessary when using air separation and air routing. It is sufficient here to load the take-up roll 49 with an approximately constant torque, e.g. B. with an unwinding on the shaft of the take-up reel 49, provided with a weight 66, rope 67. With a fabric width of about 8 m, the weight 66, worn downwards, would also require a free depth of about 8 m. This is avoided by compensating for the relative movement of the woven strip seam weaving machine, in that the auxiliary warp threads 56, which are no longer used on the winding roller 49 and are no longer used, are held in tension by means of an unwinder roller 68 which is connected to the winding roller 49 in an axially and rotationally fixed manner, around which the rope 67 is wound on which the drive weight 66 depends.

The rope 67 is deflected from the originally vertical position into a horizontal position (indicated by dashed lines in FIGS. 11 and 12) and brought up to a deflection roller 69, from which the drive weight 66 then hangs down. As a result of this measure, the relative displacement of the seam weaving machine is used to substantially eliminate the movement of the weight 66.

In the same sense, instead of an air stream, a liquid stream can be used as a guide means for separating, e.g. B. water or a water emulsion. The effect is basically the same, although the air flow creates a back pressure while the water flow creates an impulse.

The weft threads can also be separated by means of electrical field forces by electrostatically charging the weft threads and the street over which the individual weft thread is to be guided with the same poles. To do this, two opposing capacitor plates are used (not shown).

The weft thread 12 is separated and guided up to the plug-in arm 43 'by means of air flow, liquid flow or electrostatics, regardless of the accuracy of the guide steps. This significantly simplifies the control of the seam weaving machine.

The woven strip 38 does not need to come about exclusively by partially weaving out the textile web 4, but can instead take in auxiliary warp threads 56 that are woven into the fabric and are foreign to the fabric. This measure means that you are no longer bound to the specified number of stems for the type of tissue.

If the wave structure of the threads is designed in such a way that the air flow is not easily able to cause the weft thread 12 to be woven into it to jump out of the weave 38, an additional separator, namely a needle separator 70 in the form of one with at least one soft steel needle 71 used as a brush-provided brush, cf. Fig. 13. When the needle separator 70 rotates, the steel needles 71 tear the weft thread 12 to be woven in from the weave; the weft thread 12 is then brought into the respectively open seam weaving compartment 11 in the manner described above.

As has been shown in experiments, with a simple straight-line insertion of the corresponding now weft thread 12, originally warp thread, into the corresponding seam weaving compartment 11 with the aid of plug-in arm 43 ′, the respective now weft thread 12, originally warp thread, can be added by pushing in with the sley 6 the woven seam 13 is not always brought into its position in the woven seam 13 that is predetermined by the weaving process.

So that the respective now weft thread 12, originally warp thread, introduced into the corresponding seam weaving compartment 11 in the cycle of the seam weaving process is brought into its position in the weaving seam 13 predetermined by the weaving process with each work cycle, it is necessary to insert it into the seam weaving compartment 11 with the aid of Insert arm 43 'inserted weft thread 12, originally warp thread, under a defined tension on the weaving seam 13 before pushing it in with the sley 6.

Due to the fact that the weft thread 12 is placed under tension on the weaving seam 13, a short piece of the weft thread 12 jumps into the position predetermined by the weaving process into the weaving seam 13 before it is inserted.

So that the weft thread 12, originally warp thread, can be attached to the weaving seam 13 under tension on the weaving seam 13 before it is pushed in with the drawer 6, the tubular plug arm 43 'is in a continuous through-hole with a longitudinal axial blind hole 72' and an overlying one Threaded bore 73 'provided sliding element 74' firmly screwed into the longitudinal axial threaded bore 73 '. The sliding element 74 'is plugged with its blind hole 72' onto a guide tube 75 'which is inserted through a hole in the thicker leg of an L-shaped swivel arm 76' (FIG. 18). Rotation of the sliding element 74 'is prevented by a bolt 78' screwed into the sliding element 74 'at right angles to its longitudinal-axial axis and guided in a longitudinal groove 77' located in the substantially flatter second arm of the swivel arm 76 '.

The right-angled swivel arm 76 '(FIG. 15) can be rotated with its leg arranged in the seam weaving direction on a base plate 79' screwed into a base plate 79 'firmly screwed to the teeth 45' on the plug-in arm 43 'and secured against loosening by a nut 80' is stored and is clamped with the aid of a tension spring 82 ', which is clamped between a pin 83' mounted in the arm of the swivel arm 76 'arranged at right angles to the seam weaving direction and a second pin 84' screwed into the base plate 79 'and against one in the base plate 79' screwed-in stop pin 85 'so that the substantially flatter leg of the swivel arm 76' is aligned exactly at right angles to the direction of the seam weave.

An internal thread 86 'is cut at the end of the guide tube 75' mounted in the swivel arm 76 '. In this internal thread 86 ', a compression spring 87' located in the guide tube 75 'can be pretensioned against the sliding element 74' which is displaceable on the guide tube 75 'by means of a threaded pin 89' secured against unintentional loosening.

The sliding element 74 'is supported on the steel wires 90', 91 ', which form the weft thread clamping device 44'. These steel wires are soldered into a clamping plate 92 'which is fixedly connected to the swivel arm 76' and are passed through the plug-in arm 43 'designed as a tube and through a plastic plug 93' screwed into its front end and provided with a longitudinal axial bore.

Each of the two steel wires 90 ', 91', which form the actual weft thread clamping device 44 ', is initially aligned in an arc shape and therefore has a bracing which strays away from the original longitudinal direction or from the longitudinal direction of the plug arm 43' designed as a tube and containing the steel wires. Towards its free end, each steel wire 90 ', 91' is twisted twice and here forms a "V" with legs of unequal length, the inner shorter leg of which continues in the shape of a curve. The arcuate orientation of the one steel wire 90 'is opposite to the arc shape of the second steel wire 91', as shown in FIG. 19.

The opening and closing of the weft thread clamping device 44 'is effected by a relative displacement of the plug arm 43' mounted in the sliding element 74 'compared to the steel wires which are soldered into the clamping plate 92' screwed to the swivel arm 76 'and passed through the plug arm 43' and the plastic plug 93 ' 90 ', 91'.

By moving the plug arm 43 'against the clamping plate 92', the V-shaped steel wires 90 ', 91' emerge further from the tubular plug arm 43 '. Under the action of the tension prevailing laterally outwards in the steel wires 90 ', 91', the mutually aligned V-shaped end pieces of the steel wires 90 ', 91' open and form an open pair of pliers (FIG. 17) which open the Grips around the end of the weft thread 12 to be woven in.

This relative displacement of the plug arm 43 ' takes place in that the sliding element 74 'against one at the end (seen in the direction of movement of the rack for inserting the plug arm 43' into the seam weaving compartment 11) of a rack guide 94 'mounted in the frame G by means of thread 95' and with an insulating material 96 ' Provided soundproofing and adjustable stop 98 '(FIG. 14) secured by a nut 97' against unintentional loosening shortly before reaching the maximum stroke of the rack 45 'driven by the stepping motor 46' and thus the sliding element 74 'against the spring force of the compression spring 87 'is displaced relative to the guide tube 75' which is fixedly mounted in the swivel arm 76 '. Due to the relative displacement of the sliding element 74 'with respect to the guide tube 75', the push-in arm 43 'screwed into the sliding element 74' shifts with respect to the steel wires 90 'which are soldered into the clamping plate 92' and firmly connected to the swivel arm 76 'by the clamping plate 92'. , 91 ', with the result just described.

After reaching the maximum stroke, the rack 45 'moves back, and the plug-in arm 43' remains in the rest position until the kinks of the steel wires 90 ', 91' contact the plastic plug 93 '. The compression spring 87 'is supported against the sliding element 74' and against the threaded pin 89 ': the displacement movement of the plug-in arm 43' is limited by the kinks of the steel wires 90 ', 91' resting on the plastic plug 93 '.

The weft thread 12 ', originally warp thread, picked up by the weft thread clamping device 44', due to its firm clamping in the fabric 7 and its predetermined length due to the partial weaving of the original weft threads 8, now warp threads, results in the fact that after the insertion of the plug arm 43 'which has been carried out, the Weft thread 12, originally warp thread, creates a tensile force in the weft thread 12 through the seam weaving compartment 11 upon reaching the stretched position of the weft thread 12 against the spring force of the tension spring 82 'which approaches the right-angled swivel arm 76' against the rear stop bolt 85 'and this with the further retraction of the Plug arm 43 'increasing tensile force of the weft thread 12, originally warp thread, causes the L-shaped swivel arm 76' to rotate counter to the seam weaving direction until it bears against a front stop pin 99 '. The pivoting movement of the L-shaped swivel arm 76 ′ triggered by the tensile force of the weft thread 12 in the stretched position creates a reaction force which brings the weft thread 12 into a position parallel to the woven seam 13. The rearward reversal point of the lifting movement of the plug-in arm 43 'is designed such that, after this parallel position has been reached, the weft thread 12 is pulled out of the weft thread clamping device 44'. As described above, the weft thread clamping device 44 'picks up the now weft thread 12 at the end of the seam weaving compartment 11. The weft thread clamping device 44 'is then caused to pull out of the seam weaving compartment 11 via the toothing 45', the weft thread 12 also being pulled through.

In the previous description of the exemplary embodiment, the use of a sley 6, which is generally known in weaving technology, was assumed.

This sley 6 regulates firstly the insertion of the weft thread onto the fabric and secondly the maintenance of the defined distance between the individual warp threads.

Since both the now weft threads 10, originally warp threads, and the now warp threads 8, originally weft threads, have a wave structure in the seam weaving process due to the preceding weaving process, the respectively associated weft threads 12 introduced into the corresponding seam weave compartments 11 jump through the pushing-in action induced by the weaving drawer 6 of the weft thread 12 to the weaving seam 13 in its original position predetermined by the weaving process. A displacement of the weft thread 12, originally warp thread, introduced into the corresponding seam weaving compartment 11 and added by the weaving drawer 6, and also the warp threads 8, originally weft thread, against one another is no longer possible without external influence, even when the seam weaving compartment 11 is still open, since this is caused by the weaving process Predefined wave structure of the warp threads 8, originally weft threads, and the weft threads 12, originally warp threads, are positively prevented.

Each individual type of fabric requires a special weaving drawer 6; however, the manufacture of a woven drawer is quite complex. In the present weaving process, the sley 6 has only one task of pushing the respective weft thread 12 onto the seam 13. Since it is not possible to move the now warp threads 8 and the now weft threads 12 against one another even with the seam weaving compartment 11 still open due to the thread structure, in a further embodiment of the invention the pushing of the weft thread 12 onto the woven seam 13 can also be carried out using a needle roller rotatable in the frame G. 100 (Fig. 21), which can be used in the same shape for all types of tissue.

The needle roller 100, which is rotatably mounted in the frame, essentially consists of a shaft 101, on which two opposite rows of needles, consisting of a plurality of flexible needles 102, are arranged helically along their longitudinal axis are.

The first of these helical, opposing rows of needles is right-handed and the second opposite row is left-handed.

This measure is necessary so that the weft thread 12, originally warp thread, introduced into the seam weaving compartment 11 is digitally pushed from the point at which the weft thread 12 emerges from the fabric 7 to the woven seam 13, in individual steps in accordance with the arrangement of the elastic needles 102.

The needle roller 100 is driven by a stepper motor 103, wherein it executes a rotary movement which is limited to 180 ° in the cycle of the weaving process and then stops.

Due to the rotary rotational movement of the needle roller 100 about its longitudinal axis, which is limited to 180 ° and then intermittent, the individual needles 102 of the needle roller sweep past the weft thread 12, originally warp thread, which is added to the weaving seam 13 and leave scratch marks on it. Such scratch marks can possibly cause damage to the fabric tape in the area of the woven seam 13.

If such scratch marks have to be avoided, the weft threads 12 can be pushed into the seam weaving compartment 11 by means of Z-shaped needles 104, which are arranged next to one another in a guide bed 105, are individually axially displaceable and reach into the seam weaving compartment at their front Z end (FIG . 22).

The guide bed 105 is fixedly connected to the frame G and consists of a base plate 106 and two guide rods 107 fixedly mounted in this base plate 106, onto which rigid bend plates 109 and spacer sleeves 110, which are alternately provided with two bores 108, are pushed, whereby first a plate 109, then a spacer sleeve 110 follows on each guide rod 107. etc., lastly a sheet 109. Each spacer sleeve 110 has a length corresponding to the cross section of a Z-needle 104 and thus enables the longitudinal axial displacement of the associated Z-needle from one spacer sleeve 110 to the next.

The height distance of the guide rods 107 in the region of the base plate 106 spanning the woven seam 13 is dimensioned such that the Z needles 104 fit in between the base plate 106 and the lateral surface of each of the spacer sleeves 110 pushed onto the guide rods 107 without play (FIGS. 22 and . 24).

This construction of the guide bed means that the Z needles 104 can be moved back and forth in the weaving direction in a manner that prevents rotation. The displacement of the Z needles 104 for the purpose of pushing in the weft thread 12, originally warp thread, introduced into the corresponding seam weaving compartment 11 takes place against the seam weaving direction by means of a link 111 with an arcuate in the first third of the total length of the link 111 perpendicular to the seam weaving direction, in the second third arcuately against the seam weaving direction and in the last third again groove 112 machined at right angles to the seam weaving direction, the total length of the link 111 being three times the width of the weaving seam and the individual Z needles 104 engaging in the groove 112 with their rear end. The backdrop 111 is slidably mounted on two special backdrop guide rods 113 at right angles to the seam weaving direction.

The link guide rods 113 are mounted on one side of the base plate 106 in a sliding element 115 which is displaceable in the base plate 106 in the seam weaving direction and biased against the seam weaving direction by an adjustable compression spring 114 (coil spring or compressed air cylinder). The common displacement of the two link guide rods 113 and thus also the link 111 mounted on them is therefore necessary so that the gradual advance of the frame G does not have a tolerance-related effect on the insertion of the weft thread 12, originally warp thread, introduced into the seam weaving compartment 11 onto the woven seam 13 can have (Fig. 26).

The link 111 is fixedly connected to a toothed belt drive 116 (or rope drive) and is shifted by the latter with the aid of a stepping motor 117 in the cycle of the seam weaving process from the corresponding side of the seam 13 to the other side and vice versa.

As a result of this displacement of the link 111 from one side of the woven seam 13 to the other and vice versa, the Z-needles 104 bent in a Z-shape and engaging with the rear end in the groove 112 of the link 111 in succession each perform an axial shift corresponding to the groove path up to the woven seam 13 and back to the starting position.

As a result of this shifting of the link 111, and thus also of the individual Z needles 104, which takes place in the cycle of the seam weaving process, the weft thread 12, originally warp thread, introduced into the seam weaving compartment 11 with the aid of the plug-in arm 43 'is removed from the exit point of the weft thread 12, originally warp thread, gradually pushed from the edge of the fabric 7 to the weaving seam 13, the weft thread 12, as already explained in the description of the needle roller 100, without having to take any additional measure, in the position specified by the weaving process, even when it is still open Seam weaving compartment 11 remains.

The link 111 described above has the disadvantage that a relatively high friction occurs due to the deflection of the needle ends in the arcuate central part of the groove 112 between the Z-needles 104 and the link 111. This friction leads to increased wear and also to an increase in the drive power for the link 111. In a structurally more favorable design of the link 111, the axial Displacement of the Z-needles 104 is no longer effected by the arcuate curve piece of the groove 112 in the second third of the total length of the link 111, but by a rotatable roller 118 used instead of the curve piece (FIG. 27).

By pushing in the weft thread 12, originally warp thread, introduced into the seam weaving compartment 11 with the aid of the plug-in arm 43 ', with individual Z-needles 104 to be displaced axially in the seam weaving direction through the link 111, the drive power for pushing in the weft thread 12, originally warp thread, can be compared the sley 6 conventionally used in weaving technology and also lowered relative to the needle roller 100.

Provided that the jacquard machine 5 has a sufficient number of cords 119, it is possible to achieve a three-stage lifting of the warp threads 8. For this purpose, the cords 119 of the jacquard machine 5 are connected to one another by connecting the first cord with the six hundredth cord, the second cord with the six hundredth cord, the third cord with the five hundred and ninety-ninth cord, and so on, for example with a number of cords of 601 cords . The interconnected cords 119 form loops which run around a summing roller 120. This device shortens the time course of the seam weaving process by about half without the working speed of the individual functions of the seam weaving machine having to be increased (FIG. 28).

A special cord 122 is attached to an axis of rotation 121 of the summing roller 120, in which a main lifting element 123 for the respective warp thread 8 is inserted. In the further course of the cord 122, it is guided around a rotatably mounted deflection roller 124 and fastened to a tension spring 125 suspended in the frame G.

The jacquard machine 5 is controlled in a known manner by punch cards. The jacquard perforated card in question is punched according to the rhythm of the weaving process and makes it possible to raise the main lifting element 123 in three stages and thus simultaneously to form two seam weaving compartments 11, 11 ', the seam weaving compartment 11 being formed above and the seam weaving compartment 11' below the weaving center (shown in Fig. 29).

If the number of cords 119 of the jacquard machine 5 is not sufficient to proceed in this way, a second jacquard machine 126 can be attached in addition to the jacquard machine 5, which are rotatably connected to one another via a common shaft 127. The cords 119, 128 of the two jacquard machines 5, 126 are now cross-connected from machine to machine according to the principle described above, for example by B. the first cord 119 of the first jacquard machine 5 can be connected to the corresponding first cord 128 of the second jacquard machine 126 etc. The simultaneous formation of two seam weaving compartments 11, 11 'then takes place as described above, in that the punch cards of the two jacquard machines 5, 126 are matched accordingly.

Claims (14)

1. A method of producing a woven seam for connecting two open fabric ends, especially for producing an endless woven band, e.g. for use in the papermaking industry, wherein the fabric ends are partially unravelled, a woven strip (38) partially separated from the main fabric (7) and connected thereto only by the original warp threads (10), now weft threads, is formed in which woven strip the now weft threads are bound in by auxiliary warp threads (56) and thereby the order of the now weft threads (10) predetermined by the weaving process is retained, from the removed weft threads of the fabric ends a seam shed is formed into which the exposed original warp threads of the fabric ends are introduced as now weft threads, and the now weft threads are shifted toward the woven seam (13) and are interwoven by forming a new seam shed (11'),
characterized in that

the now weft threads (10) are released mechanically one by one from the woven strip (38) in the seam weaving process by raising and lowering the auxiliary warp threads (56) and, spatially separated from each other by means of a separator (14, 53, 58, 70) and while retained in the weaving order, are sequentially individually carried to the respective open seam shed (11) by stepwise controlled gripper and guide members (32,43,44, 58, 60, 61, 62) and are guided through said shed, the seam weaving machine and the two fabric ends of the main fabric (7) to be connected performing a movement relative to each other that is controlled preferably in the rhythm of the method steps wherein the individual steps of the relative movement correspond respectively to the advance of the seam weaving process.

2. Method according to claim 1 characterized in that, instead of the loom sley (6), a special needle roll (100) shifts the weft thread (12, 12') in the nip of the seam shed (11, 11').

3. Method according to claim 1 or 2 characterized by retaining the predetermined weaving order by interweaving auxiliary warp threads (56) alien to the fabric along the outside of the original warp and now weft threads (10) projecting from the fabric.

4. Method according to one of claims 1 to 3 characterized in that the respective thread to be interwoven is seized and guided by a stream of air.

5. Method according to one of claims 1 to 4 characterized in that after each change of shed a cut-off means aligned against the woven seam (13) enters the open seam shed (11, 11') and cuts off the respective weft thread (12, 12') or respective pair of threads (12,12') individually or jointly.

6. Method according to one of claims 1 to 5 characterized in that the original weft and now warp threads (8) are raised in three steps so as to simultaneously form two sheds (11, 11') through which one weft thread (12, 12') each is passed in mutually opposite directions.

7. Apparatus for carrying out the method according to any one of claims 1 to 6 in which the woven strip is woven, characterized in that the apparatus is composed of two mirror-inverted and otherwise identical machine halves (M, M') disposed in mutually opposed relationship, and each of said halves comprises a plurality of auxiliary lifting elements (57) for mechanically releasing the original warp and now weft threads (10, 10') fastened to cords of a jacquard machine (5) common to both halves of the machine, the original weft and now longitudinal threads of the woven strip being passed through the eyes of the auxiliary lifting elements (57), and the released weft threads (12) are individually separated from the other weft threads (10, 10') by means of a separator (53, 58, 70) controlled in the rhythm of the weaving operation, whereafter one gripper member (32) each likewise operating in the rhythm of the weaving operation seizes the free end of the emerging weft thread (12) and carries it to the seam shed (11,11') newly formed in the rhythm of the weaving operation where the weft thread end (12,12') is seized by one floating arm (43', 43) each provided with a weft thread clamping means (44', 44) and is carried through the seam shed (11, 11').

8. Apparatus according to claim 7 characterized in that said apparatus is mounted on a frame (G) carrying both halves (M, M') of the machine and being slidably supported on a clamping means (9) on which the fabric (7) to be interwoven is held taut across its entire width.

9. Apparatus according to claims 7 or 8 characterized in that each separator (53) is composed of only a single thicker disk (18) wedged between a ring (55) provided with a screw thread on its surface, the inlet disk (16), and the outlet disk (19).

10. Apparatus according to claims 7 or 8 characterized in that each separator is composed of a wind channel consisting of aerodynamically shaped baffles (60, 61, 62) and an air nozzle (58) extending into said channel, the air stream produced by the air nozzle being deflected in the wind channel (60, 61, 62) and acting as gripper and guide for the respective weft thread (12) to be interwoven.

11. Apparatus according to one of claims 7 to 10 characterized in that at the point of emergence of the weft thread (12) released from the weave of the woven strip (38) there is arranged a needle separator (70) consisting of a shaft rotating in the rhythm of the weaving operation and at least one separator needle (71) mounted rectangularly on said shaft.

12. Apparatus according to one of claims 7 to 11 characterized by a tubular floating arm (43') controlled in the course and in the rhythm of the seam weaving operation, pivotable from a two- armed rocker arm (76') for movement back and forth through the respective seam shed (11) and having in the tubular interior at least one steel wire (90', 91') bent at its free end and fastened to the rocker arm (76') so as to be slidable relative to the floating arm (43') and clamping between the bent portion and the open tube end of the floating arm (43') the respective weft thread (12) to be interwoven and, after retraction from the seam shed (11) and pivoting of the floating arm (43') in the rhythm of the seam weaving operation, releasing the weft thread (12).

13. Apparatus according to one of claims 7 to 12 characterized in that the individual weft threads (12) are shifted to the nip of the seam shed (11) by a needle roll (100) supported for rotation in the frame (G) and driven step-wise and carrying on its rotating shaft (101) two oppositely disposed rows of needles consisting of a multiplicity of flexible needles (102) in helical arrangement such that the helix of one needle row has an "S" twist and that of the second needle row has a "Z" twist.

14. Apparatus according to one of claims 7 to 13 characterized in that the individual weft threads (12) are shifted in the seam shed (11) by means of needles (104) bent rectangularly, e.g. in "Z" fashion, and arranged mutually parallel and longitudinally slidable on a guide bed (105), each needle extending with one end into a curved groove (112) in a block (111) reciprocatable in the rhythm of the weaving operation, while the bent free needle portons extend into the seam shed (11) where they perform a shifting motion conforming to the configuration of the curve of said groove (112).

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