US3367587A - Method for forming and packaging roving - Google Patents

Description

Feb. 6, 1968 J. P. KLINK ETAL METHOD FOR FORMING AND PACKAGING ROVING Filed May 14, 1965 3 Sheets-Sheet l INVENTORS Jim/1M 2 Aim/K I JAN/5 6.551.415 r/AMES H 5 APS 1958 J. P. KLINK ETAL METHOD FOR FORMING AND PACKAGING RQVING Filed May 14, 1965 5 Sheets-Sheet 2 E JAM:

O 5 5 T E WWW U W M 1 B. P H 0 M T f 7 W 4 J4 Feb. 6, 1968 J. P. KLINK ETAL 3,367,587

METHOD FOR FORMING AND PACKAGING ROVING Filed May 14; 1965 s Sheets-Sheet s I J PROGRAMME/Q 1 F I L1 9 4 L2 '7 167 1: 2 g M\iwummmmum I [:1 I]

INVENTORS (/E/POME E A L/A/K JAMES 6. Saw:

fl/WES H 515A RS ,drram/lfys United States Patent ()ffice 3,367,587 METHOD FOR FORMHNG AND PACKAGING RGVING Jerome P. Klink, James C. Belue, and James H. Sears, Anderson, 5. 3., assignors to Givens-Corning Fiherglas (Iorporation, a corporation of Delaware Filed May 14, 1965, Ser. No. 455,753 5 Claims. (Cl. 242-18) ABSTRACT OF THE DISCLGSURE The invention relates to a roving and to a method of and apparatus for forming fibers or filaments of the roving by attenuating streams of mineral material into fibers or filaments and winding the roving in a package having ends in parallel planes, the method including compacting the roving at the package ends to form a package of cylindrical shape throughout its length.

This invention relates to a method of and apparatus for forming heat-softenable material to filaments and packaging the newly formed filaments, and more particularly to attenuating streams of heat-softened material such as glass to filaments, forming a roving of the filaments and winding the roving into a package.

Endeavors have been made to produce comparatively large wound packages of a strand or roving of newly formed filaments attenuated from glass streams.

Difficulties have been encountered in forming large packages of such roving or strand by winding the same on a Winding collet. Heretofore, in forming strand packages it has been a practice to employ a builder mechanism providing a tapered end package to prevent sloughing of the roving or strand at the package ends, this method necessarily limiting the size of the package.

Heretofore it was deemed desirable to apply size or coating material to the filaments of the roving in order to establish some degree of integrity in the roving to facilitate further processing. The filaments forming the roving were attenuated at high linear speeds and the filaments being acted upon by an oscillator or traverse means at such high linear speeds and at high oscillator frequencies resulted in an excessive amount of fuzz which impaired the quality of the roving as a certain amount of fuzz is necessarily embodied in the wound package. Such method of packaging could not provide a finished package with square ends normal to the axis of the package or produce a package of substantially uniform diameter throughout the length of a package.

The present invention embraces a method of attenuating streams of heat-softened mineral material, such as glass, into continuous filaments, combining the filaments into a roving and winding the roving into a package in a manner providing a substantially cylindrical package with square or planar ends in parallel planes normal to the axis of the wound package whereby a package of roving of comparatively large size may be produced economically.

The invention embraces the provision of a method of producing substantially large packages of continuous filament roving wherein the roving is traversed during winding of the package in a manner to produce a cylindricallyshaped Wound package with planar ends without the use of support means for the ends of the package.

An object of the invention embraces a novel roving product wherein a large number of streams of glass are attenuated to continuous filaments simultaneously and the filaments gathered into untwisted bundled relation providing a roving wherein the filaments are not adhered one to another by coating material.

An object of the invention resides in a provision of a 3,367,587 Patented Feb. 6, 1968 wound package of continuous filament roving and a method of forming a Wound package of roving wherein the roving is traversed during package formation to effect collection of the roving in successive layers of equal length and wherein the pattern of deposition of the roving in each layer is maintained throughout the entire package by varying and correlating the rate of movement of the traverse proportional to the increasing size of the package during its formation.

Another object of the invention resides in a method of winding a multi-filament roving into a package wherein the roving is traversed during collection to provide a package of successive superposed layers, the method involving compacting the roving adjacent each end region of the package during traversing of the roving and thereby promote the formation of a cylindrically shaped package having square ends.

Another object of the invention embraces a method of guiding a roving onto a package with a traverse guide disposed close to the package and controlling the position of the traverse guide as the package increases in size to continuously maintain the guide close to the peripheral surface of the package.

Another object of (the invention resides in a method of controlling the relative position of a traverse guide for the roving being wound into package formation wherein a sensing medium is influenced by the enlarging package to control the position of a traverse guide means for the roving relative to the package.

Another object resides in a sensing means which is influenced by the package as the latter increases in size to actuate mechanism for moving the traverse guide rad i-ally of the package through successive incremental distances only sumcient to maintain the traverse guide close to the peripheral surface of the package throughout its formation.

Another object of the invention resides in engaging a guide for the roving with the end reg-ions of the package being formed during traversing of the roving to compact or compress the roving at the package ends.

Another object embraces a method of attenuating and converging filaments of glass directly into a roving and packaging the roving wherein the quantity of the filaments and size of the filaments are such as to effect a sufiiciently high unit throughput of glass from a stream feeder and thereby secure economic advantages to an extent that the large number and size of filaments facilitates a comparatively slow linear rate of filament attenuation and slow traverse of the roving during packaging to thereby substantially eliminate interabrasion of the filaments during collection providing a roving of high quality at reduced cost.

Another object of the invention is the provision of a method of winding a roving into a package in :a manner whereby a comparatively large package may be formed having square ends and Without end supports for the package during winding.

Another object of the invention resides in an apparatus embodying an arrangement for accumulating roving at a region spaced from the package forming region during periods of start-up until the filaments of the roving attain a substantially constant linear speed to provide a roving fashioned of filaments of uniform size.

Another object of the invention resides in an apparatus and arrangement for resetting .a traverse guide for the roving from the position at the completion of a package to a position for properly guiding the roving onto an empty collector at the start of a package.

Another object of the invention resides in a combined sensor and guide for a roving positioned close to the package of roving being formed, the combined sensor and roving guide being mounted for traverse lengthwise of the package and disposed whereby the same is engaged by the package at the regions of reversal of the traverse :at the ends of the package to exert a force or pressure against the end regions of the package to compact the roving at said end regions to form a package of cylindrical shape having square ends and wherein a predetermined pressure between the sensor and the package actuates means to reposition the sensor and roving guide relative to the package to accommodate the enlarging package.

Further objects and advantages are within the scope of this invention such as relate to the arrangement, operation and function of the related elements of the structure, to various details of construction and to combinations of parts, elements per se, and to economics of manufacture and numerous other features as will be apparent from a consideration of the specification and drawing of a form of the invention, which may be preferred, in which:

FIGURE 1 is a semi-diagrammatic front elevational view of an apparatus for carrying out the method of forming and packaging roving of continuous filaments of heat-softenable material;

FIGURE 2 is a side elevational view of the apparatus illustrated in FIGURE 1;

FIGURE 3 is an enlarged front elevational view of the pack-age size sensor and guide for the roving and means for traversing the roving during package formation;

FIGURE 4 is a sectional view showing the package size sensor and traverse guide means for the roving and switch means for controlling the circuit of traverse positioning means;

FIGURE 5 is a top plan view of a portion of the traverse mounting anrn shown in FIGURE 3 illustrating the sensor and guide for the roving;

FIGURE 6 is an elevational view of the package of roving showing the method of compacting the roving at the end regions of the package by the traverse guide;

FIGURE 7 is an isometric view of a completed package of roving illustrating the square ends of the package, and

FIGURE 8 is a schematic illustration of components of the apparatus for packaging the roving and controls therefor.

While the method and apparatus of the invention are particularly usable for forming filaments of heat-softened mineral material such as glass and producing roving of the filaments and packaging the roving, it is to be understood that the method and apparatus may be utilized for forming and packaging roving formed of other fiberfonming materials.

Referring initially to FIGURES 1 and 2 of the drawings there is illustrated a receptacle or feeder 10 containing a supply of heat-softened glass or other filamentforming material. Where the material is glass the feeder 10 may be connected with a forehearth (not shown) supplied with glass from a furnace, or the glass may be reduced to heat-softened condition in a melter or other means connected with the feeder 10. The feeder or receptacle 10 is provided at its ends with terminal lugs 12 adapted to be connected with a source of electric energy for supplying heat to the material in the receptacle to maintain the material at the proper temperature and viscosity for forming filaments.

The floor or tip section 14 of the feeder it is equipped with a large number of depending projections or tips 16, the tips having orifices therein for flowing streams 18 of the glass or other filament-forming material from the feeder.

The streams are attenuated into individual continuous filaments 20. A feature of the invention involves forming a roving 2.2 by converging a large number of filaments 26' attenuated directly from the glass streams 18 into untwisted bundled relation by a gathering shoe 24.

The roving comprises at least one thousand individual continuous filaments and preferably contains two thousand or more filaments simultaneously attenuated from streams flowing from the feeder 10. The individual filaments are of an average diameter of twenty hundred thousandths of an inch or more. The large number of filaments making up the roving and the size of the filaments enables attenuation at comparatively slow linear speed of about four thousand five hundred feet per minute with a slow traverse during package formation. The high throughput of glass facilities production of the roving at a low cost. A second shoe or guide for the roving may be provided as shown in FIGURES 1 and 2. Nozzles 23 may be provided for directing sprays of water onto the newly formed filaments.

While it is preferable to form the roving in which the only material delivered onto the filaments is water, for certain end uses, it may be desirable to apply lubricants or coating materials to the filaments. For this purpose an applicator housing 26 supports an applicator 28 which, as shown in FIGURE 2, may be an endless belt partially immersed in coating material contained in the housing for transferring the coating material to the filaments through wiping action of the filaments engaging a film of coating material on the applicator belt 28.

The roving 22 is collected in a package by a Winding machine or apparatus 32, the roving being wound onto a collector, such as a tube or sleeve 34, telescoped onto a rotatable collet 36. The winding of the roving into a package attenuates the glass streams 18 to filaments 20. The winding collet 36 is rotated by an electrically energizable motor 38 contained within a housing 40 of the winding machine.

The speed of the motor 38 is varied in a manner hereinafter explained to reduce the rotational speed of the winding collet 36 as the package of roving 35 increases in size so as to maintain substantially constant the linear speed of the filaments to attenuate filaments of uniform size.

An important feature of the invention resides in the method and arrangement for guiding and traversing the roving as it is wound into a package wherein the traverse guide for the roving is maintained at all times close to the package in order that the roving is properly distributed on the package and is compacted at the end regions of the package.

The method involves the step of compacting the roving at the package ends, viz at the region of reversal of a traverse means for the roving to provide support for each succeeding layer to assure the formation of a square end package and eliminating a stair-step or tapering effect and consequently any tendency for the roving to slough off at the package ends, the package being formed without lateral support for the ends of the package. The traverse guide means for the roving is mounted on a support means or arm 60, shown in FIGURES 1 through 4, provided with a hollow or tubular horizontal section 62 in which a traverse actuating means or member 64 is journally mounted for rotation.

The member 64 is of cylindrical shape and is fashioned with a multiple return groove or cam 66 for reciprocating a traverse member 68. The axis of the traverse actuator 64 is parallel with the axis of the winding collet 36.

The traverse member 68, which may be of metal or rigid resinous material, is fashioned with grooves 70, the grooves accommodating ways 72 provided on the member 62 and which are parallel with the axis of the traverse actuator 64 providing for reciprocable movement of the traverse 68 along the ways 72.

The traverse 68 is equipped with a cam follower 74 of arcuate shape fitting in the cam grove 66. The follower 74- is formed with a tenon portion 76 which is journaled for pivotal movement in the traverse member 68, as shown in FIGURE 4, to accommodate swivel or pivotal movement of the follower 74 at the reversal regions 66' of the multiple return groove 66. The traverse member 68 is equipped with a guide means 78 for the roving, the guide means 78 also functioning to compact the roving at the ends of the package and to sense increase in the size of the package.

The traverse guide 78 for the roving includes a disclike portion 80 having a stem or shaft 82 slidably mounted in openings in bars 83 and 84 of the traverse member 68. The portion 80 supports a pad or member 86 of Micarta or other material having a recess or slot 87 accommodating the roving 22. for guiding the roving onto the package during reciprocating traverse of the guide. An abutment member or pin 88 carried by the stem 82 limits the outermost position of the pad 86. An expansive coil spring 90 engages the bar 84 and a washer 92 adjacent the pin 88 for biasing the traverse guide member toward the periphery of the package 35 on the collet 36.

As shown in FIGURES 2 and 3, the rotatable traverse actuator 64, journaled in the horizontal section 62 of the arm 60, has a shaft portion 94 equipped with a sprocket 95 connected by a nonslipping belt 96 with a second sprocket 98, the latter being mounted on a shaft 99 which is driven through suitable transmission gearing 180 from an electrically energizable motor 102, or connected through a nonslipping means with motor 38 to positively maintain constant ratio. The shaft 99 extends through a hollow portion 104 of the arm 60 extending into and journaled in bearings (not shown) mounted within the winding machine housing 40. In this manner the traversing cam 64 is rotated by the motor 102, or through other mechanical means, independently of the relative position of the arm 60. The traverse guide is reciprocated at a comparatively slow speed as filament attenuation is carried on at a comparatively slow speed. These characteristics substantially eliminate abrasion or impairment of the roving by the traverse guide.

The method of the invention involves maintaining the guide 78 close to the package and includes an arrangement responsive to the increase in size of the package for moving or repositioning the traverse support arm 60 to accommodate the enlarging package while maintaining the giude means 78 for the roving in substantially the same position close or adjacent to the periphery of the package throughout the formation of the package.

This arrangement includes means for initiating incremental movements of the arm 60 and the traverse guide 78 for the roving away from the package as the package increases in size. As shown in FIGURE 2, the journal portion 184 of the arm 60 is connected by power transmission mechanism 106 including speed reducing mechanism 108 with a motor 110.

The motor 110 is of a comparatively slow speed synchronous type rotating at about 70 rpm. The power transmission mechanism and speed reducing gearing may be of the planetary type although any suitable mechanism may be used to effect a high ratio reduction between the motor 110 and the arm 68.

The motor 110 for shifting the position of the traverse support arm 60 is in circuit with means for energizing and controlling the operation of the motor 110 through 'a sensing medium brought into operation by increase in the size of the package of roving.

Mounted on the traverse 68 is a microswitch 118, the operative plunger 128 of the microswitch being aligned with the plunger or stem 82. The pad 86 of the guide 78 is adapted to be engaged by the package upon an increase in size of the package and provides a sensor for repositioning the arm 60 and the traverse mechanism carried thereby whenever the package engages the member 86 to depress the stem or plunger 82 to actuate the microswitch 118 to energize the motor 118 to effect a very slight rotation of the arm 60 about the axis of shaft 99 laterally away from the package.

A timer or time delay relay 122 (shown in FIGURE 8) regulates the duration of rotation of the motor initiated by the closing of the microswitch 118 to move the strand guide and sensor 78 a very slight distance away from the package in increments, an increment of movement taking place with each actuation of the plunger 120 of the microswitch by the stem 82 of the sensor 78 when the enlarging package exerts sufiicient radial pressure on the traverse guide 86 to compress the spring 90.

It is preferable that the package size sensor circuit for moving the traverse support arm 60 be rendered operative when the traverse guide 78 is adjacent an end region of the package. The circuit through the microswitch 118 includes a spring contact member 124 which is adapted for engagement with a contact 126 mounted adjacent the region of reversal 66' at one end of the cam 64, the contact 126 being insulated from the horizontal section 62 ot' the traverse support means.

Through this arrangement the contact 124 engages the contact 126 through a short distance of traverse of the member 68 at one region of its reversal of movement. Thus while a sensor and guide 78 may at times be engaged by peripheral regions of the package being formed, the sensor circuit is rendered effective when the traverse member 68 is in a position engaging contact 124 with contact 126. A second set of contacts (not shown) similar to contacts 124 and 126 is provided for the other current conductor connected with the microswitch 118.

In operation of the traverse member 68 the member reciprocates full length of the cam groove 66 in one direction and at the region of reversal 66' reverses its direction and travels uninterrupted in the opposite direction until its reversal at the opposite end of the cam groove 66.

Through this method of traverse, the successive wraps or convolutions of roving are not in crossing relation but are collected in successive layers in which the convolutions of a layer are wound in the same direction with the wraps or convolutions of adjacent layers wound in a different direction to form a wound package.

It has been found that in winding a package of single strand roving without radial pressure on the package that the roving at the end regions of the package at the reversal zones of the traverse guide tends to form end zones 138, shown in broken lines in FIGURE 6, of larger diameter than the remainder of the package and increases the liability of the roving to slough off at package ends.

The method of the invention includes the steps of compacting the roving radially of the package at each end region of the package during package formation. This is accomplished by the traverse guide 78 for the roving. The expansive spring surrounding the stem or rod 82, shown in FIGURE 5, is fashioned to exert radial pressure against the roving in the end regions of the package sufiicient to compact the roving at said regions whereby to form a cylindrically shaped package as shown-in FIG- URE 7 with square ends 132, viz. the ends lying in parallel planes normal to the longitudinal axis of the package.

A conventional carpenters square 133 engaging the package in the manner shown in FIGURE 7 serves to illustrate the cylindrical package with square ends. Through this method a wound package is produced without the use of package end supports during winding.

With the form of package produced by the method and apparatus of the invention, the package is self-supporting and upon removal of the completed package 35 and collector 34, the collector, being a thin Walled tube, may be collapsed and removed from the interior of the package so that the roving may be withdrawn from the inside of the package for further processing.

The arrangement includes means for moving the traverse arm 60 and traverse guide away from the package at its completion in order to facilitate removing or dofiing the completed package from the collet 36, and for resetting or repositioning the traverse guide close to an empty collector telescoped onto the winding collet 36 upon which a new package is to be formed.

Mounted within the housing 4-0 is a cylinder 13%, shown in broken lines in FIGURES 1 and 2, in which is disposed a piston 135 attached to a piston rod 136, the piston rod being connected as at 138 with a member 140 secured to an extending portion 142 of the traverse arm construction 60. The cylinder 134 is equipped with fluid conveying tubes 144 and 146 to convey fluid such as compressed air, into the cylinder to move the piston rod in either direction for moving the traverse arm portion 62 toward or away from the winding collet 36.

Means is also provided for releasing a planetary ring of the speed reduction mechanism 168 arranged between the motor 110 and the drive shaft 99 for driving the traverse cam 64. In the embodiment illustrated, a cylinder 150 is provided with a piston and piston rod for actuating a clutch means (not shown) for engagement and disengagement with a planetary ring of the mechanism 1% to render ineffective the planetary speed reducing mechanism between the motor 116 and the arm 60 to enable fluid under pressure such as compressed air introduced into the cylinder 134 to move the traverse arm 60 independently of the drive motor 110 and the speed reducing mechanism 108.

A roving take-up or pull roll 160 is journaled in bearings (not shown) contained within the housing 40, the roll being driven by a motor 161, shown in FIGURE 8, energized by switch means 162 controlled by the operator. The purpose of the roving take-up roll 160 is to effect substantially continuous attenuation of the filaments forming the roving during the period of initial start-up and during the period in which the completed package is brought to rest, removed from the collet and an empty collector placed upon the collet preparatory to forming a new package. Through this arrangement, attenuation of the streams to filaments is maintained substantially continuous so as not to appreciably impair or affect the thermal conditions in the feeder during transfer of the roving onto an empty collector.

The circuits and programmer for controlling the several motors to accomplish the performance of method steps in winding packages of roving are schematically illustrated in FIGURE 8. The programmer 165 is for varying the speed of the collet drive motor 38 and varying the speed of the traverse -drive motor 102 and for conveying current to the traverse arm actuating motor 110. The programmer 165 is of the character disclosed and described in Smith Patent 3,109,602 wherein the speed of the collet driving motor 38 is gradually reduced as the package of roving increases in size and the speed of the traverse drive motor 102 is gradually reduced in order to maintain uniform the pattern of orientation of the roving in the package.

These are important factors in winding a satisfactory package of roving. The rate of progressive decrease in speed of the collet motor 38 is programmed to maintain substantially constant the linear speed of the filaments being attenuated in order that the filaments be of uniform size, and the traverse rotor is proportionately reduced in speed to facilitate the formation of a cylindrically-shaped package of roving having square ends.

The cycle of operations and sequence of method steps in forming a roving package is as follows: During formation of a package on the rotating collector 34, the advancing roving is being traversed by the traverse guide 78 which is reciprocated lengthwise of the package through the drive transmitted by the multiple return groove or cam 66 on the rotating traverse drive member 64 communicated to the traverse member 68 through the cam follower 74 engaged in the groove 66.

The roving is traversed throughout the full length of the package at each reciprocation of the traverse member 63 so that the successive wraps of roving are in wound relation. The traverse guide member 86, under the influonce of the force of the spring 90, exerts radial pressure on the roving in the package at the end regions thereof to compact the roving to successfully form a cylindricallyshaped square end package as hereinbcfore described.

In order to properly guide the roving as it is collected in the package, the traverse guide 86 should be substantially continuously maintained as close as practicable to the package. During formation, the package is progressivcly enlarging in diameter and the sensor arrangement for maintaining the traverse guide 78 close to the package functions as follows: As the package diameter increases, it exerts radial pressure on the guide 86 compressing the spring 91 the spring pressure compacting the roving at the ends of the package.

The enlarging package further compresses the spring until the plunger or stem 82 engages and depresses the plunger or operative member 120 of the microswitch 118 to close this switch. In this condition when the traverse member 68 approaches an end region of its travel, the microswitch 113 being in circuit closing position, the contact 124 engages the contact member 126 carried by the traverse support 62 and completes a circuit through the time delay relay 122 to energize the motor 119.

The rotation of the motor through the speed re ducing mechanism 108 effects a slight rotation of the arm 60 about the axis of shaft 99 in a counterclockwise direction as viewed in FIGURE 1 to move the traverse guide 86, member 68 and associated components a slight distance away from the periphery of the package. The time delay relay 122, shown in FIGURE 8, is of a character to maintain the motor 110 energized for a period of time to move the arm 60 and the traverse means 78 sufficient to relieve the compression of the spring 90 with the surface of the traverse guide 86 engaging the surface of the package or spaced not more than about 5 of an inch from the package.

Package winding continues with the arm 60 and section 62 in the re-adjusted position until the enlarging package again compresses the spring 96 to an extent to move the plunger 82 to actuate the plunger of the microswitch 118, this operation again closing the circuit of the motor 111} through the time delay relay 122 and repositioning the traverse support arm 60 and traverse guide 86.

Repetitive repositioning of the traverse mechanism and traverse guide continues until completion of the package to maintain the traverse guide 86 at all times in engagement with or close to the package.

When the package 35 is completed, the operator depresses a stop switch button 167, de-energizing, through the programmer, the collet motor 38 and the traverse drive motor 102, and energizes the pull roll drive motor 161. Solenoid actuated valve means (not shown) is energized by the switch button 167 to direct compressed air to the cylinder (shown in FIGURE 2) to release the planetary gearing 108 from the motor 110 and concomitantly direct compressed air through tube 146 into the right-hand end of cylinder 134 to move the piston 135 to swing the traverse arm 60 to its outermost position away from the completed package.

As the completed package approaches a position of rest, the operator breaks the roving and snubs the advancing roving onto the rotating pull or take-up roll to continue attenuation of the filaments. The operator doffs or removes the completed package from the collet and telescopes an empty tube 34 onto the collet. The operator depresses a foot-operated switch means to maintain an interruption of the circuit to the collet drive motor 38.

The depression of the foot-operated switch energizes valves means (not shown) to admit compressed air to the left-hand end of cylinder 134 to swing the traverse arm clockwise to its innermost position to bring the traverse guide 86 close to the empty collector as shown in broken lines in FIGURE 1 and to release air pressure in the cyl- 9 inder 150 for reestablishing the drive connection between the motor 110 and the traverse arm 60.

The operator then breaks the advancing roving and wraps a few convolutions on the empty collector and releases the foot-operated switch to energize the collet drive motor 38 and de-energize the pull roll drive motor 161.

When the winding collet reaches attenuating speed, the operator positions the advancing roving in the path of the traverse guide 86 which is self-threading, the roving automatically entering the groove 87 and traversing and package winding of the roving is carried on.

The collet motor 38 rotates the collet 36 at the proper speed to attenuate the streams 16 to continuous filaments and, as the package increases in size, the programmer 165 automatically and progressively reduces the speed of the collet drive motor 38 so as to maintain substantially constant the linear travel of the filaments so that the filaments throughout the package are of uniform size and progressively reduces the speed of the traverse member 68 to maintain the proper orientation of the roving throughout the package.

The package 35 of roving wound according to the method of and by the apparatus of the invention comprises successive layers of equal length and has square ends, that is, the planes of the ends are in substantial parallelism and the periphery of the package of cylindrical shape. The packages are wound without end supports. The method of forming the package eliminates sloughing of the roving at the package ends and enables the production of comparatively large packages of roving containing upwards of ninety pounds of roving in a single package. The method of forming and packaging the multi-filament roving substantially eliminates the so-called catenary effect heretofore encountered in forming roving usually resulting from unequal tension of the filaments.

The package of roving may be readily processed through a drying operation or the package impregnated with coating material if desired. The method and apparatus for guiding the roving onto the package by guide means disposed close to the package and sensing the enlarging package to successively reposition the traverse guide enables constant control of the roving by the traverse guide to effect a repetitive pattern of orientation of the roving in each layer of roving and secure substantially uniform tension throughout the package. The use of the method of the invention results in a novel roving of filaments ofglass which are directly attenuated from glass streams and the roving collected in comparatively large packages and at low cost rendering the method commercially economical.

It is apparent that, within the scope of the invention, modifications and different arrangements may be made other than as herein disclosed, and the present disclosure is illustrative merely, the invention comprehending all variations thereof.

We claim:

1. A method of packaging roving of filamentary material including winding the roving into a package upon a rotating collector, engaging the advancing roving during winding with a traverse guide at the zone of collection of the roving in the package, moving the traverse guide to distribute the roving lengthwise of the package, and compacting the roving in the package by the traverse guide at its end regions to form a cylindrically-shaped package with its ends in substantially parallel planes.

2. A method of packaging a roving comprising filaments of glass including winding the roving into a package upon a rotating collector, traversing the advancing roving during winding to distribute the roving lengthwise of the package, and engaging the roving at the end regions of the package with a body radially movable relative to the package to compact the roving in said end regions to form a cylindrically-shaped wound package having its ends in substantially parallel planes.

3. A method of producing and packaging a roving of continuous filaments including flowing streams of heatsoftened material from a supply, attenuating the streams to continuous filaments and collecting the filaments into a roving, winding the roving into a package upon a rotating collector, engaging the advancing roving during winding with a traverse guide at the zone of collection of the roving in the package, reciprocating the traverse guide to distribute the roving lengthwise of the package, and exerting radial pressure by the traverse guide on the roving in the package at its end regions to compact the roving at said regions.

4. A method of producing and packaging a roving of continuous filaments including flowing streams of heatsoftened glass from a supply, attenuating the streams of glass into continuous filaments and directing the filaments to form a roving, winding the roving into a package upon a rotating collector, engaging the advancing roving during winding with a traverse guide at the region of collection of the roving in the package, reciprocating the traverse guide to distribute the roving lengthwise of the package in successive layers with the convolutions of each layer in side-by-side noncrossing relation to form a wound package, and exerting pressure by the traverse guide on the roving in the package at its end regions to compact the roving at said regions.

5. The method of forming and packaging roving of mineral filaments including flowing streams of heat-softened mineral material from a stream feeder, attenuating the streams to continuous filaments by winding the roving of filaments on a rotating collector to form a package, modulating the rotating speed of the collector as the package increases in size to maintain substantially constant the linear speed of the filaments to form filaments of uniform size, traversing the roving by a traverse guide throughout the length of the package, modulating the speed of the traverse guide as the package increases in size, and compacting the roving by the traverse guide at the end regions of the package during collection of the roving to form a cylindrically-shaped package having square ends.

References Cited UNITED STATES PATENTS 954,344 4/1910 Rhoades 242-178 1,277,933 9/1918 Holt et al. 24218 3,109,602 11/1963 Smith 242-18 STANLEY N. GILREATH, Primary Examiner.

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