EP1144253B1 - Procede pour la production d'un sachet refermable - Google Patents

Procede pour la production d'un sachet refermable Download PDF

Info

Publication number
EP1144253B1
EP1144253B1 EP00900072A EP00900072A EP1144253B1 EP 1144253 B1 EP1144253 B1 EP 1144253B1 EP 00900072 A EP00900072 A EP 00900072A EP 00900072 A EP00900072 A EP 00900072A EP 1144253 B1 EP1144253 B1 EP 1144253B1
Authority
EP
European Patent Office
Prior art keywords
sheet
pouch
fold portion
folded
mouth
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.)
Expired - Lifetime
Application number
EP00900072A
Other languages
German (de)
English (en)
Other versions
EP1144253A1 (fr
Inventor
Stephen John Holloway
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.)
Imperial Tobacco Group Ltd
Original Assignee
Imperial Tobacco Ltd Great Britain
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
Application filed by Imperial Tobacco Ltd Great Britain filed Critical Imperial Tobacco Ltd Great Britain
Priority to EP00900072A priority Critical patent/EP1144253B1/fr
Publication of EP1144253A1 publication Critical patent/EP1144253A1/fr
Application granted granted Critical
Publication of EP1144253B1 publication Critical patent/EP1144253B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B61/00—Auxiliary devices, not otherwise provided for, for operating on sheets, blanks, webs, binding material, containers or packages
    • B65B61/18—Auxiliary devices, not otherwise provided for, for operating on sheets, blanks, webs, binding material, containers or packages for making package-opening or unpacking elements
    • B65B61/188—Auxiliary devices, not otherwise provided for, for operating on sheets, blanks, webs, binding material, containers or packages for making package-opening or unpacking elements by applying or incorporating profile-strips, e.g. for reclosable 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
    • B31B70/8132—Applying the closure elements in the machine direction

Definitions

  • the present invention relates to a method for producing a resealable pouch such as that used for storing tobacco.
  • the invention relates in particular to a method for inserting a resealable fastener into a pouch during the forming process of a standard tobacco pouch from a continuous reel of material.
  • a pouch for tobacco is conventionally formed from a thermoplastic material, capable of being welded to itself using a combination of heat and pressure.
  • the continuous material, or web is folded on itself along the length of the web from one side towards the other side, the fold being approximately a third the way along the width of the web, thus forming a double thickness web with a fold at one side and an extension of single thickness material extending from the double thickness to the opposite side of the web.
  • the distance from the folded edge to the extremity of the double thickness will be approximately the same as the distance from the double thickness part of the web to the other edge.
  • the double thickness part of the folded web is then welded, at fixed intervals across the width of the web, forming a continuous length of folded material formed into individual pockets of equal size, by the welds.
  • the welds formed are of a reasonable thickness.
  • the continuous length of formed pockets are cut by a knife along the welds, forming individual pouches welded at each side, with an extended flap approximately equal in length to the depth of the pouch.
  • the individual pouches are filled with the product, tobacco, through the mouth of the pouch.
  • the extended flap of the pouch is folded below the mouth of the pouch, but over the pouch mouth, so as to form the flap around the pouch.
  • a second fold of the flap is made around the base of the pouch to form a completely wrapped pouch. This method of wrapping does not prevent loss of moisture from the contents, or spillage of the contents, before and during use.
  • Document WO 83 04011 A discloses a method of producing a resealable pouch comprising a reclosable fastener.
  • the pouch is formed from a plastic film and the reclosable fastener is welded to the film during a first step of the process.
  • the object of the present invention is to provide a method of producing a resealable pouch by inserting a resealable fastener into the pouches during the forming process so as to enable enhanced moisture retention of the product, or perceived moisture retention by the user, and to enable a reduction in spillage of the product before and during the use of the pouch.
  • the present invention provides a method of producing resealable filled pouches comprising the steps of folding across part of its original width a length of thermoplastics sheet to produce a folded sheet having a fold portion running lengthways of the sheet having a folded edge which fold portion extends across part of the original width of the sheet and a non fold portion extending from the fold portion to the other edge of the sheet; in a direction at right angles to the folded edge and at regular intervals along the folded edge, welding the fold portion together to form individual pockets of equal size having welded wall edges along the length of the sheet; cutting the sheet, across the width of the sheet and along the line of the welds, to produce individual pouches each having a mouth, welded edges and an extended flap portion; filling each pouch, through its mouth, with desired contents and folding the extended flap over the mouth so as to form the flap around the pouch; characterised in that, at the time of forming the fold portion of the sheet, a resealable fastener is located on the sheet in a direction parallel to the edges
  • the fastener is supplied in the form of two interengaging closure strips, supplied in the engaged position.
  • Each strip is typically formed with a protrusion, designed to engage with the complimentary strip, and flanges extending from the sides of the protrusion.
  • the base of each of the closure strips may be provided with one or more flanges. It is a requirement that the closure strips are introduced and fixed into position, whilst engaged, so as to ensure perfect alignment between the two complimentary strips to ensure resealability. Any misalignment between the two complimentary strips will act so as to prevent full re-closure of the fastener or render the resealing action unworkable by the user. It is also a requirement of the process to ensure the closure is in the unengaged position when the pouch reaches the filling position. Both these actions are achieved in the manner described below.
  • the pouch is formed in the manner described for a standard pouch, the resealable fastener, in its engaged position, being introduced into the forming process as the thermoplastic sheet is folded.
  • the fastener is guided into the folded sheet into the position at which it is to be secured, i.e., immediately below what will become the mouth of the pouch,and the flanges of the closure strips are then welded to the pouch material in the correct position.
  • Welding the fastener into the pouch while engaged ensures alignment is maintained between the complimentary strips. Care should be taken to ensure that the flanges from opposing complementary closure strips do not become welded together.
  • the material and closure strips may be chilled, by a cooling mechanism, so as to prevent stretching or puckering of the material, which may occur due to retained heat.
  • the closure strips which up to this point in time are engaged together are disengaged, whilst maintaining the positioning of the complimentary strips relative to each other.
  • the opposing closure strips are welded together using a high-energy method of welding, such as ultra-sonic welding, at fixed points along their lengths which points coincide with the positions at which the side welds, to form the pouches, will be made.
  • These welds are generally of a similar width as the side welds and act to ensure proper location of the opposing closures by closing the closures at the point of the weld, and "crushing" the closure with the ultra-sonic weld, or similar high-energy weld.
  • an ultra-sonic weld or similar high-energy weld, ensures the opposing closures are securely welded together, such that the weld will not break under normal use of the pouch, and also acts to produce a thin weld, which does not adversely affect the visual impact of the pouch. It is important to note that, at this point, the closure, welded into mouth of the pouch, is in the unengaged position, and that the closure has to remain generally unengaged for the remainder of the forming and filling process. Also note that the ultra-sonic weld is designed to extend slightly beyond the width of the fastener for reasons that will become apparent.
  • welds are made from the weld at the closure to the fold in the web, in the same manner as for the standard side weld.
  • the side weld preferably does not extend to the same distance as the original weld, as the closure weld would cause adverse interference with side weld. Therefore, the side weld preferably welds from the fold in the web to immediately below the closure flanges, and acts to interfere with the extension of the closure weld below the flanges. This interference is important to ensure an airtight weld is maintained from the web fold to above the fastener.
  • the guide strip used preferably extends throughout the pouch forming process up to the point the side welds are made, thus aiding with positive location and tracking of the closure and material.
  • the continuous web of formed pouches, with the resealable fastener secured into the mouths of the pouches, is cut down the centre of the weld to form individual pouches sealed at each side, the resealable fastener remaining generally open. Any partial closing of the fastener that may have occurred can be eliminated by a blast of compressed air aimed at the mouth of the pouch.
  • the individual pouches are then filled, subsequent to all formation of the individual pouches, through the mouth of the pouch.
  • the preferred application of the invention is in the production of resealable pouches of tobacco, it is possible to fill the pouches with different products, such as food products.
  • the fastener After deposition of the product into the pouch, the fastener is closed by means of pressure exerted onto the fastener.
  • the pouch is preferably folded in a similar manner to that used in conventional pouch production; the first fold occurring between the filled pouch and the bottom of the fastener.
  • the fastener is positioned such that the fold occurs in the same place as it does in a conventional pouch and hence does not affect the capacity of the pouch.
  • a second fold of the flap around the base of the pouch can be made as in the conventional pouch.
  • thermoplastics sheet used may be a sheet of polyethylene.
  • the sheet may also be a laminate of a thermosplastics material with one or more layers of similar or different thermoplastics material, a metalised or metal coated sheet material or a paper Web.
  • thermoplastics sheet may be supplied from a continuous reel.
  • thermoplastics sheet may be folded such that the distance from the folded edge to the mouth of the pouch is equal to the distance from the mouth of the pouch to the edge of the extended flap.

Landscapes

  • Mechanical Engineering (AREA)
  • Engineering & Computer Science (AREA)
  • Making Paper Articles (AREA)
  • Bag Frames (AREA)
  • Packages (AREA)
  • Adhesives Or Adhesive Processes (AREA)
  • Containers And Plastic Fillers For Packaging (AREA)
  • Auxiliary Devices For And Details Of Packaging Control (AREA)
  • Polysaccharides And Polysaccharide Derivatives (AREA)
  • Supplying Of Containers To The Packaging Station (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)
  • Sealing Material Composition (AREA)
  • Wrappers (AREA)

Claims (12)

  1. Procédé de fabrication de sachets remplis refermables comprenant les étapes consistant à :
    plier sur une partie de sa largeur initiale une longueur de feuille thermoplastique pour produire une feuille pliée présentant une portion de pli s'étendant sur la longueur de la feuille présentant un bord plié, ladite portion de pli s'étend sur une partie de la largeur initiale de la feuille, et une portion sans pli s'étendant de la portion de pli à l'autre bord de la feuille ;
    dans une direction à angles droits au bord plié et à des intervalles réguliers le long du bord plié, souder la portion de pli ensemble pour former des pochettes individuelles d'une taille égale présentant des bords de paroi soudés sur la longueur de la feuille ;
    couper la feuille, sur la largeur de la feuille et le long de la ligne des soudures, pour produire des sachets individuels présentant chacun une ouverture, des bords soudés et une portion de rabat étendue ;
    remplir chaque sachet, à travers son ouverture, du contenu prévu et plier le rabat étendu sur l'ouverture de manière à former le rabat autour du sachet ;
       caractérisé en ce que, au moment de la formation de la portion de pli de la feuille, une attache refermable est placée sur la feuille dans une direction parallèle aux bords de la feuille et dans une position prédéterminée pour se situer directement en dessous des ouvertures des sachets, où l'attache refermable comprend deux bandes de fermeture à inter-engagement dans une position engagée, chaque bande de fermeture de celui-ci comportant une portion de base, et en ce que les portions de base de chacune des deux bandes de fermeture à inter-engagement, pendant que les bandes sont en prise, sont soudées aux surfaces opposées de la feuille respectivement dans la portion de pli et où, après le soudage de l'attache refermable, les bandes de fermeture sont désengagées l'une de l'autre, les bandes de fermeture étant amenées à venir en prise l'une avec l'autre après le remplissage du sachet et avant la formation du rabat étendu sur le sachet.
  2. Procédé selon la revendication 1, où la feuille thermoplastique est une feuille de polyéthylène.
  3. Procédé selon l'une des revendications 1 ou 2, où la feuille est un laminé d'un matériau thermoplastique avec une ou plusieurs couches d'un matériau thermoplastique similaire ou différent, d'un matériau de feuille métallisée ou plaquée métal ou d'une bande de papier.
  4. Procédé selon l'une des revendications 1 à 3, où le soudage est exécuté par un soudage à ultrasons.
  5. Procédé selon l'une des revendications 1 à 5, où la base de chacune des bandes de fermeture présente un ou plusieurs rebords.
  6. Procédé selon la revendication 5, où la portion pliée de la feuille est soudée jusqu'à directement en dessous des rebords sur la bande de fermeture.
  7. Procédé selon l'une des revendications 1 à 6, où l'attache refermable est refroidie immédiatement à la suite du soudage à la feuille thermoplastique.
  8. Procédé selon l'une des revendications 1 à 7, où le rabat étendu de chaque sachet formé individuellement est plié sur le sachet, après le remplissage de celui-ci, à une position entre le sachet rempli et le fond de l'attache.
  9. Procédé selon l'une des revendications 1 à 8, où le rabat, après avoir été plié sur l'ouverture du sachet, est plié autour de la base du sachet.
  10. Procédé selon l'une des revendications 1 à 9, où les sachets sont remplis de tabac.
  11. Procédé selon l'une des revendications 1 à 10, où la feuille thermoplastique est fournie à partir d'une bobine continue.
  12. Procédé selon l'une des revendications 1 à 11, où la feuille thermoplastique est pliée de telle sorte que la distance du bord plié à l'ouverture du sachet est égale à la distance de l'ouverture du sachet au bord du rabat étendu.
EP00900072A 1999-01-06 2000-01-06 Procede pour la production d'un sachet refermable Expired - Lifetime EP1144253B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP00900072A EP1144253B1 (fr) 1999-01-06 2000-01-06 Procede pour la production d'un sachet refermable

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
EP99300091 1999-01-06
EP99300091 1999-01-06
PCT/GB2000/000020 WO2000040465A1 (fr) 1999-01-06 2000-01-06 Procede pour la production d'un sachet refermable
EP00900072A EP1144253B1 (fr) 1999-01-06 2000-01-06 Procede pour la production d'un sachet refermable

Publications (2)

Publication Number Publication Date
EP1144253A1 EP1144253A1 (fr) 2001-10-17
EP1144253B1 true EP1144253B1 (fr) 2002-10-09

Family

ID=8241176

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00900072A Expired - Lifetime EP1144253B1 (fr) 1999-01-06 2000-01-06 Procede pour la production d'un sachet refermable

Country Status (19)

Country Link
EP (1) EP1144253B1 (fr)
JP (1) JP2002534293A (fr)
CN (1) CN1336888A (fr)
AT (1) ATE225733T1 (fr)
AU (1) AU771156B2 (fr)
CA (1) CA2358541C (fr)
CZ (1) CZ300194B6 (fr)
DE (1) DE60000572T2 (fr)
DK (1) DK1144253T3 (fr)
EA (1) EA003007B1 (fr)
EE (1) EE200100357A (fr)
ES (1) ES2180507T3 (fr)
HK (1) HK1043098A1 (fr)
HU (1) HU224878B1 (fr)
ID (1) ID30078A (fr)
NZ (1) NZ512603A (fr)
PT (1) PT1144253E (fr)
WO (1) WO2000040465A1 (fr)
ZA (1) ZA200105581B (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CZ300194B6 (cs) * 1999-01-06 2009-03-11 Imperial Tobacco Limited Zpusob výroby opetovne utesnitelného vácku
USD805687S1 (en) 2014-10-02 2017-12-19 Digirettes, Inc. Vaping device tank

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102152497B (zh) * 2010-11-30 2012-12-26 厦门亚太创新机器有限公司 折叠和冲切塑料袋的生产设备
EP3330190A1 (fr) * 2016-12-02 2018-06-06 Swedish Match North Europe AB Procédé et agencement pour l'emballage par portion d'un produit à priser emballé oral

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4205504A (en) * 1978-09-01 1980-06-03 Gregg Engineering Corp. Method and device for making envelopes from a continuous web and including the stuffing and sealing of those envelopes
WO1983004011A1 (fr) * 1982-05-17 1983-11-24 Harold Forman Procede et dispositif de formation continue d'emballages refermables d'articles
FR2613691B1 (fr) * 1987-04-10 1989-09-29 Kaysersberg Sa Procede et dispositif pour realiser un etui avec etiquette rapportee
US5247781A (en) * 1991-08-08 1993-09-28 Kraft General Foods, Inc. In-line application of closure to packaging film
GB9711248D0 (en) * 1997-05-31 1997-07-23 Imp Tobacco Co Ltd Resealable pouch for tobaco
EP1144253B1 (fr) * 1999-01-06 2002-10-09 Imperial Tobacco Limited Procede pour la production d'un sachet refermable
EP1048230A1 (fr) * 1999-04-29 2000-11-02 Imperial Tobacco Limited Appareil pour la fabrication de blagues refermables

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CZ300194B6 (cs) * 1999-01-06 2009-03-11 Imperial Tobacco Limited Zpusob výroby opetovne utesnitelného vácku
USD805687S1 (en) 2014-10-02 2017-12-19 Digirettes, Inc. Vaping device tank
USD805686S1 (en) 2014-10-02 2017-12-19 Digirettes, Inc. Vaping device

Also Published As

Publication number Publication date
JP2002534293A (ja) 2002-10-15
ID30078A (id) 2001-11-01
ZA200105581B (en) 2002-06-21
HUP0104893A2 (hu) 2002-04-29
CZ20012463A3 (cs) 2002-01-16
WO2000040465A1 (fr) 2000-07-13
ATE225733T1 (de) 2002-10-15
HU224878B1 (en) 2006-03-28
ES2180507T3 (es) 2003-02-16
DE60000572T2 (de) 2003-06-26
HUP0104893A3 (en) 2002-11-28
AU771156B2 (en) 2004-03-18
CA2358541C (fr) 2007-02-20
NZ512603A (en) 2002-12-20
EA200100751A1 (ru) 2001-12-24
DE60000572D1 (de) 2002-11-14
EA003007B1 (ru) 2002-12-26
AU1883800A (en) 2000-07-24
CA2358541A1 (fr) 2000-07-13
PT1144253E (pt) 2003-02-28
DK1144253T3 (da) 2002-10-28
CZ300194B6 (cs) 2009-03-11
HK1043098A1 (zh) 2002-09-06
EE200100357A (et) 2002-10-15
CN1336888A (zh) 2002-02-20
EP1144253A1 (fr) 2001-10-17

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