US3537137A - Machine for hot-crimping skirts of plastic capsules and the like - Google Patents

Machine for hot-crimping skirts of plastic capsules and the like Download PDF

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Publication number
US3537137A
US3537137A US684045A US3537137DA US3537137A US 3537137 A US3537137 A US 3537137A US 684045 A US684045 A US 684045A US 3537137D A US3537137D A US 3537137DA US 3537137 A US3537137 A US 3537137A
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crimping
machine
hot
skirts
turret
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US684045A
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Francois Lancesseur
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/56—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using mechanical means or mechanical connections, e.g. form-fits
    • B29C65/567—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using mechanical means or mechanical connections, e.g. form-fits using a tamping or a swaging operation, i.e. at least partially deforming the edge or the rim of a first part to be joined to clamp a second part to be joined
    • B29C65/568—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using mechanical means or mechanical connections, e.g. form-fits using a tamping or a swaging operation, i.e. at least partially deforming the edge or the rim of a first part to be joined to clamp a second part to be joined using a swaging operation, i.e. totally deforming the edge or the rim of a first part to be joined to clamp a second part to be joined
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/78—Means for handling the parts to be joined, e.g. for making containers or hollow articles, e.g. means for handling sheets, plates, web-like materials, tubular articles, hollow articles or elements to be joined therewith; Means for discharging the joined articles from the joining apparatus
    • B29C65/80—Rotatable transfer means for loading or unloading purposes, i.e. turret transfer means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
    • B29C66/112—Single lapped joints
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/13—Single flanged joints; Fin-type joints; Single hem joints; Edge joints; Interpenetrating fingered joints; Other specific particular designs of joint cross-sections not provided for in groups B29C66/11 - B29C66/12
    • B29C66/135—Single hemmed joints, i.e. one of the parts to be joined being hemmed in the joint area
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/20—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines
    • B29C66/24—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being closed or non-straight
    • B29C66/242—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being closed or non-straight said joint lines being closed, i.e. forming closed contours
    • B29C66/2422—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being closed or non-straight said joint lines being closed, i.e. forming closed contours being circular, oval or elliptical
    • B29C66/24221—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being closed or non-straight said joint lines being closed, i.e. forming closed contours being circular, oval or elliptical being circular
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
    • B29C66/53—Joining single elements to tubular articles, hollow articles or bars
    • B29C66/534—Joining single elements to open ends of tubular or hollow articles or to the ends of bars
    • B29C66/5346—Joining single elements to open ends of tubular or hollow articles or to the ends of bars said single elements being substantially flat
    • B29C66/53461—Joining single elements to open ends of tubular or hollow articles or to the ends of bars said single elements being substantially flat joining substantially flat covers and/or substantially flat bottoms to open ends of container bodies
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/61—Joining from or joining on the inside
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/814—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/8141—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined
    • B29C66/81411—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined characterised by its cross-section, e.g. transversal or longitudinal, being non-flat
    • B29C66/81425—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined characterised by its cross-section, e.g. transversal or longitudinal, being non-flat being stepped, e.g. comprising a shoulder
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/814—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/8141—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined
    • B29C66/81427—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined comprising a single ridge, e.g. for making a weakening line; comprising a single tooth
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/814—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/8141—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined
    • B29C66/81431—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined comprising a single cavity, e.g. a groove
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/816—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the mounting of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/8167—Quick change joining tools or surfaces
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/82—Pressure application arrangements, e.g. transmission or actuating mechanisms for joining tools or clamps
    • B29C66/822—Transmission mechanisms
    • B29C66/8226—Cam mechanisms; Wedges; Eccentric mechanisms
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
    • B29C66/832—Reciprocating joining or pressing tools
    • B29C66/8322—Joining or pressing tools reciprocating along one axis
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D51/00—Closures not otherwise provided for
    • B65D51/24—Closures not otherwise provided for combined or co-operating with auxiliary devices for non-closing purposes
    • B65D51/28—Closures not otherwise provided for combined or co-operating with auxiliary devices for non-closing purposes with auxiliary containers for additional articles or materials
    • B65D51/30—Closures not otherwise provided for combined or co-operating with auxiliary devices for non-closing purposes with auxiliary containers for additional articles or materials for desiccators
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/814—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/8141—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined
    • B29C66/81411—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined characterised by its cross-section, e.g. transversal or longitudinal, being non-flat
    • B29C66/81421—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined characterised by its cross-section, e.g. transversal or longitudinal, being non-flat being convex or concave
    • B29C66/81423—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined characterised by its cross-section, e.g. transversal or longitudinal, being non-flat being convex or concave being concave

Definitions

  • Plastics stoppers, capsules and gaskets of round, square or other general configuration, comprising a skirt portion are now frequently used in many applications requiring, in said skirt portion, the presence of a dehydrating product in the form of a tablet, powder or the like, which is retained in position by a cardboard disc; in all cases, to prevent the escape of the aforesaid dehydrating product the edge of the skirt is crimped onto the tablet or the cardboard disk; in certain cases, this skirt is provided internally and an external skirt is added for imparting a greater flexibility to the capsule or stopper.
  • Stoppers, capsules, gaskets or boxes of which the skirt has been crimped by the machine of this invention are easily distinguished from other similar articles by the quality of the crimping.
  • FIG. 1 is an axial section showing in vertical axial alignment, before the beginning of the crimping operation proper, a stopper of which the skirt is to be crimped, and the corresponding crimping head;
  • FIG. 2 is a similar view showing the same elements at the beginning of the crimping operation
  • FIG. 3 is an elevational view of an automatic crimping machine with parts shown in section taken along the line III-III of FIGURE 4;
  • FIG. 4 is a horizontal section taken upon the line IV- IV of FIGURE 3.
  • the plastic stopper illustrated by way of example in the drawing comprises a bottom 1 and an external skirt 2; it further comprises an internal skirt 3 formed with an inner shoulder 4 and provided at its outer end with a thinner lip 5; a dehydrating product 6 in granular or powder form is adapted to be disposed within the inner skirt 3 and a cardboard disc or washer 7 bearing on the shoulder 4 is provided for retaining this product 6 in position.
  • a tool head 8 shown in FIGS. 1 and 2 is used; this head 8 is adapted to be heated by using electric current or any other suitable source of energy, and comprises at its lower portion a circular annular groove 9 of curved radial configuration; the contour of this groove 9 is such that if a pressure is exerted on the tool head 8 in a direction parallel to its axis and towards the stopper the heated circular groove 9 will soften the material constituting the thinner lip 5 of skirt 3 so as to crimp said lip over the washer or disc 7.
  • This operation may be carried out automatically by using the machine illustrated diagrammatically in FIG- URES 3 and 4.
  • This machine comprises a turret-platform 10 formed with spaced peripheral notches 11 each adapted to receive an open-ended tubular plastic stopper 12 to be crimped; these stoppers are fed from a transverse chute 13 either by gravity alone, due to its inclination, or by being carried along by an endless belt conveyor 14 driven from a motor 16 by means of a transmission 15, the shaft of this motor 15 having secured thereon a pair of cams 17 and 18.
  • the first cam 17 controls the rocking motion of a twoarmed lever 19 fulcrumed about a vertical pivot pin 20; the end of lever 19 which is opposite the follower end 21 engaging the contour of cam 17 carries an integral foot 22 adapted to stop the aligned stoppers 23 in their guide chute 13; thus, when the cam 17 causes the lever 19 to pivot about its pin 20 in the clockwise direction as shown by the arrow, this foot 22 releases the leading stopper 23 so that the latter can move forwards until it engages an abutment 24; during its movement in the opposite direction restoring said lever to the position illustrated, the heel 25 of foot 22 causes a stopper 12 to penetrate into the notch 11 then registering therewith.
  • the crimping heads 8a, 8b are mounted by pairs on the lower end of rods 30a, 30b guided by a mounting ring 31 rotatably rigid with said turret platform 10, and carried by a strap 32 constantly biased upwardly by a return spring 33, so that the roller 34 carried by strap 32 rolls on a fixed cam 50 concentric to said turret-platform 10'.
  • the assembly comprising said tool heads 8a, 8b and their supporting members 30a, 30b, 31, 32, 33 and 34 revolves bodily with the turret-platform 10.
  • the stoppers 35 held in position by exert a certain pressure on the thin lips or open end portion of the skirts 3 to be crimped by means of their curved grooves 9, this pressure being exerted during more than one-half of a revolution of said turret-platform the heat is eflfective immediately so as to facilitate the crimping operation, as these heads are brought to the proper temperature to this end.
  • an inclined abutment member 38 is sufiicient, when the heads 8a and 8b have been raised again to their upper, inoperative position, for gradually extracting the stoppers from their notches 11 and bring them in succession firstly to position 39 and then to position 40 on the discharge chute 41, as shown in FIG. 4.
  • a machine for hot-crimping open-ended tubular plastic stoppers comprising a rotatably mounted turret; drive means for rotationally driving said turret; means defining a plurality of Work stations on said turret for receiving and holding open-ended tubular plastic stoppers stations; each of said crimping elements having a working position operable to effect a hot-crimping operation; each crimping element comprising a crimping head having an annular portion arcuate in cross section dimensioned to encircle and deform inwardly the open end portion of a tubular plastic stopper seated in one of said work station's, heating means for heating each crimping head, follower means cooperative with said stationary cam track in response to rotation of said turret to eflect movement of each crimping head to said working position and maintain it therein throughout the hot-crin1ping operation, connecting means for connecting said crimping elements together in pairs; and wherein each said follower means comprises a cam follower rotatably

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Package Closures (AREA)
  • Labeling Devices (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)

Description

Nov. 3, 1970 F. LANCESSEUR 3,537,137
MACHINE FOR HOT-CRIMPING SKIRTS OF PLASTIC CAPSULES AND THE LIKE Filed Nov. 17, 1967 2 Sheets-Sheetl Fin-.1. Fi .2.
7 E 9 4 5 4 5 2 I 2 a {a}; a 6 f a Nov. 3, 1970 F. LA NCESSEUR 3,537,137
MACHINE FOR HOT-CRIMPING SKIRTS OF PLASTIC CAPSULESAND THE LIKE Filed Nov. 17, 1967 3 Sheets-Sheet 2 J S: 11 21 [L 20 24 22 23 15 United States Patent 3,537,137 MACHINE FOR HOT-CRIMPING SKIRTS 0F PLASTIC CAPSULES AND THE LIKE Francois Lancesseur, 1 Rue du Dome, Paris, France Filed Nov. 17, 1967, Ser. No. 684,045 Claims priority, application France, Oct. 20, 1967,
125,242 Int. Cl. B29c 17/00, 3/00 US. Cl. 18-19 1 Claim ABSTRACT OF THE DISCLOSURE Machine for hot-crimping the skirts, plastic stoppers, capsules and gaskets, comprising a turret-platform, sta tions disposed at spaced intervals along the periphery of said turret-platform and adapted to receive the plastic stoppers to be crimped, crimping heads rotatably driven by said-turret platform, corresponding in number to, and overlying, said stations, said head being mounted for vertical sliding movement, spring means constantly urging said heads away from the underlying stations, a fixed ca-m concentric to said turret-platform and resiliently engaged by an upper extension of each crimping head, said cam being adapted to move each crimping head downwards toward the stopper to be crimped and thus cause said crimping operation to take place and subsequently allow said head to rise again under the control of said spring means upon completion of the crimping operation.
BACKGROUND OF THE INVENTION Plastics stoppers, capsules and gaskets of round, square or other general configuration, comprising a skirt portion, are now frequently used in many applications requiring, in said skirt portion, the presence of a dehydrating product in the form of a tablet, powder or the like, which is retained in position by a cardboard disc; in all cases, to prevent the escape of the aforesaid dehydrating product the edge of the skirt is crimped onto the tablet or the cardboard disk; in certain cases, this skirt is provided internally and an external skirt is added for imparting a greater flexibility to the capsule or stopper.
Up to now the crimping operation was carried out mainly by using a conventional roller.
SUMMARY OF THE INVENTION It is the essential object of the present invention to provide a machine for hot-crimping plastic stoppers, capsules or gaskets, which is characterized notably in that it comprises a crimping head proper, made of bronze, brass or the like, adapted to be heated to the desired temperature and shaped to produce the desired crimping step by simply exerting a pressure, without any movement of rotation, so as to prouce a permanent distortion of the plastic material constituting the outer lip of the skirt.
Stoppers, capsules, gaskets or boxes of which the skirt has been crimped by the machine of this invention are easily distinguished from other similar articles by the quality of the crimping.
BRIEF DESCRIPTION OF THE DRAWING The attached drawing illustrates by way of example a typical form of embodiment of a machine constructed according to the teachings of this invention. In the drawmg:
FIG. 1 is an axial section showing in vertical axial alignment, before the beginning of the crimping operation proper, a stopper of which the skirt is to be crimped, and the corresponding crimping head;
3,537,137 Patented Nov. 3, 1970 "ice FIG. 2 is a similar view showing the same elements at the beginning of the crimping operation;
FIG. 3 is an elevational view of an automatic crimping machine with parts shown in section taken along the line III-III of FIGURE 4;
FIG. 4 is a horizontal section taken upon the line IV- IV of FIGURE 3.
DESCRIPTION OF THE PREFERRED EMBODIMENT The plastic stopper illustrated by way of example in the drawing comprises a bottom 1 and an external skirt 2; it further comprises an internal skirt 3 formed with an inner shoulder 4 and provided at its outer end with a thinner lip 5; a dehydrating product 6 in granular or powder form is adapted to be disposed within the inner skirt 3 and a cardboard disc or washer 7 bearing on the shoulder 4 is provided for retaining this product 6 in position.
To keep the assembly in position the lip 5 of inner skirt 3 must be crimped over the disc or washer 7.
To this end, a tool head 8 shown in FIGS. 1 and 2 is used; this head 8 is adapted to be heated by using electric current or any other suitable source of energy, and comprises at its lower portion a circular annular groove 9 of curved radial configuration; the contour of this groove 9 is such that if a pressure is exerted on the tool head 8 in a direction parallel to its axis and towards the stopper the heated circular groove 9 will soften the material constituting the thinner lip 5 of skirt 3 so as to crimp said lip over the washer or disc 7.
This operation may be carried out automatically by using the machine illustrated diagrammatically in FIG- URES 3 and 4.
This machine comprises a turret-platform 10 formed with spaced peripheral notches 11 each adapted to receive an open-ended tubular plastic stopper 12 to be crimped; these stoppers are fed from a transverse chute 13 either by gravity alone, due to its inclination, or by being carried along by an endless belt conveyor 14 driven from a motor 16 by means of a transmission 15, the shaft of this motor 15 having secured thereon a pair of cams 17 and 18.
The first cam 17 controls the rocking motion of a twoarmed lever 19 fulcrumed about a vertical pivot pin 20; the end of lever 19 which is opposite the follower end 21 engaging the contour of cam 17 carries an integral foot 22 adapted to stop the aligned stoppers 23 in their guide chute 13; thus, when the cam 17 causes the lever 19 to pivot about its pin 20 in the clockwise direction as shown by the arrow, this foot 22 releases the leading stopper 23 so that the latter can move forwards until it engages an abutment 24; during its movement in the opposite direction restoring said lever to the position illustrated, the heel 25 of foot 22 causes a stopper 12 to penetrate into the notch 11 then registering therewith.
Then, the other cam 18 moves the stud 26 to the left against the resistance of a return spring 27, thus moving the hook member 28 and causing the turret-platform 10 to be intermittently rotated due to engagement with one tooth 29; the number of teeth 29 corresponds to that of said peripheral notches 11; therefore, another notch is substituted for the one having just received a stopper 12 and is therefore ready to receive another stopper.
The crimping heads 8a, 8b are mounted by pairs on the lower end of rods 30a, 30b guided by a mounting ring 31 rotatably rigid with said turret platform 10, and carried by a strap 32 constantly biased upwardly by a return spring 33, so that the roller 34 carried by strap 32 rolls on a fixed cam 50 concentric to said turret-platform 10'.
The assembly comprising said tool heads 8a, 8b and their supporting members 30a, 30b, 31, 32, 33 and 34 revolves bodily with the turret-platform 10.
During this rotation, the stoppers 35 held in position by exert a certain pressure on the thin lips or open end portion of the skirts 3 to be crimped by means of their curved grooves 9, this pressure being exerted during more than one-half of a revolution of said turret-platform the heat is eflfective immediately so as to facilitate the crimping operation, as these heads are brought to the proper temperature to this end.
At the end of the travel, an inclined abutment member 38 is sufiicient, when the heads 8a and 8b have been raised again to their upper, inoperative position, for gradually extracting the stoppers from their notches 11 and bring them in succession firstly to position 39 and then to position 40 on the discharge chute 41, as shown in FIG. 4.
Of course, the specific form of embodiment described hereinabove with reference to the accompanying drawing is given by way of example only and it will be readily understood that many modifications and variations may be brought thereto without'departing from the spirit and scope of the invention as set forth in the appended claim.
What I claim is:
1. A machine for hot-crimping open-ended tubular plastic stoppers comprising a rotatably mounted turret; drive means for rotationally driving said turret; means defining a plurality of Work stations on said turret for receiving and holding open-ended tubular plastic stoppers stations; each of said crimping elements having a working position operable to effect a hot-crimping operation; each crimping element comprising a crimping head having an annular portion arcuate in cross section dimensioned to encircle and deform inwardly the open end portion of a tubular plastic stopper seated in one of said work station's, heating means for heating each crimping head, follower means cooperative with said stationary cam track in response to rotation of said turret to eflect movement of each crimping head to said working position and maintain it therein throughout the hot-crin1ping operation, connecting means for connecting said crimping elements together in pairs; and wherein each said follower means comprises a cam follower rotatably mounted on said connecting means, and biasing means for continuously biasing said cam follower into contact with said stationary cam track. t
References Cited UNITED STATES PATENTS 610,630 9/1898 Miller.
941,085 11/1909 Marthinson. 1,846,999 2/ 1932 Eaton 1820 1,991,706 2/ 1935 Seabury 1820 2,169,315 8/1939 Yngve 18-19 XR 2,354,029 7/1944 Kingston 18-20 2,573,365 10/1951 Scholes 1820 XR 2,748,424 6/1956 Fay 18--20 2,803,853 8/ 1957 Brazier 18-20 2,961,717 11/ 1960 Morin.
J. SPENCER OVERHOLSER, Primary Examiner R. L. SPICER, JR., Assist-ant Examiner US. Cl. X.R. 1820
US684045A 1967-10-20 1967-11-17 Machine for hot-crimping skirts of plastic capsules and the like Expired - Lifetime US3537137A (en)

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US3729281A (en) * 1968-12-13 1973-04-24 Matsushita Electric Ind Co Ltd Apparatus for compression-molding a powder within containers
US4121896A (en) * 1976-03-24 1978-10-24 Shepherd Thomas H Apparatus for the production of contact lenses
US20020197347A1 (en) * 2001-06-25 2002-12-26 Patel Naresh C. Rotary tableting press
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CN110424032A (en) * 2019-09-10 2019-11-08 江苏师范大学 A kind of jet stream electric deposition device and its method for principal axis of pressing machine reparation

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DE3240143A1 (en) * 1982-10-29 1984-05-03 Akzo Gmbh, 5600 Wuppertal Process for embedding membranes in a thermoplastic material
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US20090288462A1 (en) * 2006-10-02 2009-11-26 Tomotaka Nishimoto Component crimping apparatus control method, component crimping apparatus, and measuring tool
US8078310B2 (en) * 2006-10-02 2011-12-13 Panasonic Corporation Component crimping apparatus control method, component crimping apparatus, and measuring tool
CN110424032A (en) * 2019-09-10 2019-11-08 江苏师范大学 A kind of jet stream electric deposition device and its method for principal axis of pressing machine reparation

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GB1173407A (en) 1969-12-10
FR1552001A (en) 1969-01-03

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