WO2000008963A1 - Bande dechirable et fabrication de sacs a fermeture par pression - Google Patents

Bande dechirable et fabrication de sacs a fermeture par pression Download PDF

Info

Publication number
WO2000008963A1
WO2000008963A1 PCT/GB1999/002661 GB9902661W WO0008963A1 WO 2000008963 A1 WO2000008963 A1 WO 2000008963A1 GB 9902661 W GB9902661 W GB 9902661W WO 0008963 A1 WO0008963 A1 WO 0008963A1
Authority
WO
WIPO (PCT)
Prior art keywords
zipper strip
male
female profile
profile portions
holes
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/GB1999/002661
Other languages
English (en)
Inventor
Murray Edward Bruce Leighton
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SUPREME PLASTICS GROUP Ltd
Original Assignee
SUPREME PLASTICS GROUP Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from GBGB9817438.6A external-priority patent/GB9817438D0/en
Priority claimed from GBGB9820696.4A external-priority patent/GB9820696D0/en
Application filed by SUPREME PLASTICS GROUP Ltd filed Critical SUPREME PLASTICS GROUP Ltd
Priority to AU53804/99A priority Critical patent/AU5380499A/en
Publication of WO2000008963A1 publication Critical patent/WO2000008963A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • 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
    • B65D33/00—Details of, or accessories for, sacks or bags
    • B65D33/16—End- or aperture-closing arrangements or devices
    • B65D33/25—Riveting; Dovetailing; Screwing; using press buttons or slide fasteners
    • B65D33/2508—Riveting; Dovetailing; Screwing; using press buttons or slide fasteners using slide fasteners with interlocking members having a substantially uniform section throughout the length of the fastener; Sliders therefor
    • 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
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • 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
    • B29C66/1122—Single lap to lap joints, i.e. overlap 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
    • B29C66/346—Making joints having variable thicknesses in the joint area, e.g. by using jaws having an adapted configuration
    • 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
    • B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
    • B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
    • B29C66/43—Joining a relatively small portion of the surface of said articles
    • B29C66/431—Joining the articles to themselves
    • B29C66/4312—Joining the articles to themselves for making flat seams in tubular or hollow articles, e.g. transversal seams
    • B29C66/43121—Closing the ends of tubular or hollow single articles, e.g. closing the ends of bags
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B70/00—Making flexible containers, e.g. envelopes or bags
    • B31B70/74—Auxiliary operations
    • B31B70/81—Forming or attaching accessories, e.g. opening devices, closures or tear strings
    • B31B70/813—Applying closures
    • B31B70/8131—Making bags having interengaging closure elements

Definitions

  • This invention relates to an improved zipper for use in the operation of form- fill -seal and conversion machines as used for the manufacture and filling of resealable plastics bags.
  • Such bags have a reclosable fastening strip adjacent to the mouth of the bag.
  • the invention also relates to methods of and apparatus for the making of resealable plastics bags, pouches and the like using such zipper.
  • the inclusion of an ultrasonic welding station to fuse the zipper strip considerably complicates the travel path of the web/zipper combination and inter alia creates problems of synchronisation between the first and second stations, as well as wandering of the web.
  • this object is achieved by the use of a zipper strip having male and female profile portions and provided at intervals along its length with holes therethrough of a size and location to bridge the male and female profile portions.
  • a zipper strip with holes, e.g. punched holes, of a dimension to bridge the male/female profile portion of the zipper strip achieves the same result as is achieved by the known fusing technique, but in a far simpler manner, as well as producing an attractive product .
  • the particular advantage of providing spaced punched holes in the zipper strip is that this can be carried out before the zipper and web of sheet material are brought together and heat sealed one to the other.
  • the punching of the zipper strip is preferably carried out at a position shortly before the zipper is sealed onto the web. This minimizes any problems of synchronisation due to stretch.
  • a method of making zipper strip which comprises the steps of : a) delivering zipper strip having interengaged male and female profile portions to a perforating device; and b) making holes therethrough at intervals along the length of the strip of a size and location to bridge the male and female profile portions.
  • the method includes fusing the male and female profile portions together adjacent to each side of each hole .
  • the invention also includes a method of manufacturing a reclosable plastics bag which comprises the steps of: i) delivering a film or web of plastics material from a supply means to bag-forming means; ii) delivering zipper strip having male and female profile portions from a supply means to the film or web and sealing the zipper strip thereto; and iii) before the aforesaid sealing, making holes through the zipper strip at intervals along its length of a size and location to bridge the male and female profile portions.
  • apparatus for making reclosable plastics bags which comprises: i) supply means for a film or web of plastics material ; ii) supply means for zipper strip having interengageable male and female profile portions; iii) sealing means arranged to seal the zipper strip to the film or web; iv) bag-forming means following the sealing means; and v) perforating means on the path of the zipper strip between its supply means and the sealing means, the perforating means being arranged to make holes through the zipper strip at intervals along its length of a size and location to bridge the male and female profile portions.
  • Fig. 1 is a schematic diagram showing a length of zipper strip having a hole punched therethrough
  • Fig. 2 is a schematic diagram illustrating one arrangement for producing the perforated zipper shown in Fig.
  • FIG. 3 is a schematic illustration of an alternative arrangement to that shown in Fig. 2;
  • Fig. 4 illustrates the passage of the film/zipper combination through part of a form-fill-seal machine
  • Fig. 5 is a schematic illustration of a further alternative arrangement
  • Fig. 6 is a schematic diagram of a modified embodiment of hole punch unit .
  • Fig. 7 shows a zipper strip having been processed by the hole punch unit of Fig. 6.
  • Fig. 1 shows a zipper strip 10 having the customary male and female profiles which are interengageable to enable the fastener to be releasable and reclosable.
  • the respective parts of the zipper strip to be attached to opposite sides of a bag, pouch or the like.
  • the male/female profiled portion of the zipper strip is indicated generally at 12.
  • holes 14 are punched or otherwise made through the zipper strip at predetermined spaced intervals along its length.
  • the holes 14 are preferably circular or elliptical and must be of a dimension across the zipper sufficient to bridge the profiled portion
  • Fig. 2 shows a reel 16 from which the zipper strip 10 is unwound.
  • the zipper strip passes around a series of dancer rollers 18a, 18b, 18c, before passing on to be united with the film of plastics material which will constitute the bags.
  • a punch unit indicated generally at 20, which serves to provide the perforations 14 as shown in Fig. 1.
  • This arrangement requires the movement of the zipper strip 10 to be intermittent as it is taken from the reel 16, so that the holes 14 can be punched through the material when the zipper strip is stationary.
  • Fig. 3 shows an alternative arrangement in which the punch unit 20 is positioned between two dancer units 18a, 18b, 18c and 22a, 22b, 22c.
  • Fig. 4 illustrates how the punched-out holes 14 are made effective within the form-fill-seal machine.
  • the incoming film 24 after having passed around a forming shoulder (not shown) and after having the punched zipper strip 10 sealed thereto passes downwardly as indicated.
  • the bottom of the bag is indicated at 25.
  • Below the end of the tube which is formed by the film 24 is a pair of heat sealing and severing jaws 26 which produce side seams in the tube to form the bags .
  • the machine is operated so that the side seams which are produced by the jaws 26 are in alignment with the perforations 14 which, as indicated in Fig. 4, are spaced at bag-width intervals .
  • the holes 14 will serve to seal each side of the bag against leakage.
  • the holes in the zipper strip 10 are punched shortly after the zipper strip leaves the supply reel 16, the punching operation may be better carried out at a point shortly before the zipper is heat sealed to the film, as shown in Fig. 5. This is to minimise problems of stretch and therefore synchronisation. If the holes are produced early in the path from reel to web, then the hole spacing may have lost some regularity by the time the zipper is heat sealed to the web.
  • the movement of the zipper can be intermittent to enable the punching to be carried out when the zipper is stationary, or alternatively one can arrange for just a section of the zipper to be brought to a stationary position for the purpose of punching the holes while the rest of the zipper maintains its motion, by judicious choice of dancer rollers or equivalent means to take up the motion.
  • Fig. 5 shows the zipper supply reel 16 and a film supply reel 30. Shortly before the zipper 10 and film 32 enter a heat sealing unit 34 the zipper strip 10 is punched by punch unit 20. The film then carrying the zipper passes to a forming shoulder 36 and onwards. Although punching of the holes 14 is preferred, other methods of perforating the zipper can alternately be used.
  • the zipper strip 10 shown in Fig. 7 is again provided with the customary male and female profiles, indicated generally at 12.
  • An elongate hole 14 is punched or otherwise made through the zipper strip at predetermined spaced intervals along its length.
  • the hole 14 is here shown as generally elliptical and must be of a dimension across the zipper sufficient to bridge the profiled portion 12. Other shapes of hole 14 may be used as desired.
  • Fig. 6 shows, in schematic form, a unit 40 which can be used to achieve this result.
  • the unit 40 comprises a central punch 20 of a shape to match the dimensions of the hole 14.
  • the unit 40 also includes two heated pins 42 which are arranged to pass through holes in a die 44 and then pierce through the zipper at the fusion points 38. The heat from the pins 42 causes the fusion.
  • the unit 40 is arranged to move in a reciprocating manner relative to the zipper strip, with the motion of the unit 40 and strip 10 being synchronised to produce the spaced holes 14.
  • the primary advantages of this embodiment of zipper strip in accordance with the invention are that the fusing of the profiles together means that one stops the holes from slipping apart, and also that the profiles are kept together so that when one starts to close the bag or pouch the male and female profiles are already together.
  • the hole punch in accordance with the invention can be fitted to both vertical and horizontal form-fill-seal machines, as well as to conversion machines.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Making Paper Articles (AREA)

Abstract

L'invention concerne une bande déchirable (10) destinée à des sacs plastiques à fermeture par pression et possédant des parties (12) de profil mâle et femelle capables de s'engrener mutuellement, la bande déchirable présentant à intervalles déterminés sur toute sa longueur des trous (14) possédant une taille et une localisation telles qu'ils relient les parties de profil mâle et femelle. Cela facilite le scellement par les joints latéraux des sacs remplis. Des points de fusion peuvent également être formés de manière contiguë à chaque côté de trou pour permettre la fusion des parties de profil mâle et femelle à ces points.
PCT/GB1999/002661 1998-08-12 1999-08-12 Bande dechirable et fabrication de sacs a fermeture par pression Ceased WO2000008963A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU53804/99A AU5380499A (en) 1998-08-12 1999-08-12 Zipper strip and making of resealable bags

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
GBGB9817438.6A GB9817438D0 (en) 1998-08-12 1998-08-12 Zipper for form-fill-seal machines
GB9817438.6 1998-08-12
GBGB9820696.4A GB9820696D0 (en) 1998-09-24 1998-09-24 Zipper for form-fill-seal machines
GB9820696.4 1998-09-24

Publications (1)

Publication Number Publication Date
WO2000008963A1 true WO2000008963A1 (fr) 2000-02-24

Family

ID=26314188

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB1999/002661 Ceased WO2000008963A1 (fr) 1998-08-12 1999-08-12 Bande dechirable et fabrication de sacs a fermeture par pression

Country Status (2)

Country Link
AU (1) AU5380499A (fr)
WO (1) WO2000008963A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2441685A4 (fr) * 2009-06-12 2013-01-23 Idemitsu Unitech Co Ltd Procédé de fabrication pour sac d'emballage à bande de fermeture à glissière et appareil de fabrication associé
DE102020126880A1 (de) 2020-10-13 2022-04-14 Rovema Gmbh Vorrichtung zur Bearbeitung eines Verschlussbandes in einer Verpackungsmaschine

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0481783A2 (fr) * 1990-10-19 1992-04-22 Reynolds Consumer Products, Inc. Méthode et appareil pour la formation d'un emballage refermable
US5273511A (en) * 1993-03-30 1993-12-28 Illinois Tool Works Inc. Method to improve welding of profiled plastic film or tape
WO1996011138A2 (fr) 1994-10-11 1996-04-18 Hanlex Limited Fabrication et remplissage de sacs en plastique

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0481783A2 (fr) * 1990-10-19 1992-04-22 Reynolds Consumer Products, Inc. Méthode et appareil pour la formation d'un emballage refermable
US5273511A (en) * 1993-03-30 1993-12-28 Illinois Tool Works Inc. Method to improve welding of profiled plastic film or tape
WO1996011138A2 (fr) 1994-10-11 1996-04-18 Hanlex Limited Fabrication et remplissage de sacs en plastique

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2441685A4 (fr) * 2009-06-12 2013-01-23 Idemitsu Unitech Co Ltd Procédé de fabrication pour sac d'emballage à bande de fermeture à glissière et appareil de fabrication associé
DE102020126880A1 (de) 2020-10-13 2022-04-14 Rovema Gmbh Vorrichtung zur Bearbeitung eines Verschlussbandes in einer Verpackungsmaschine
DE102020126880B4 (de) 2020-10-13 2022-10-27 Rovema Gmbh Vorrichtung zur Bearbeitung eines Verschlussbandes in einer Verpackungsmaschine

Also Published As

Publication number Publication date
AU5380499A (en) 2000-03-06

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