Classifications

• • 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
• • 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
  • B31B70/8133—Applying the closure elements in the cross direction
• • 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
  • B31B2155/00—Flexible containers made from webs
• • 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
  • B31B2155/00—Flexible containers made from webs
  • B31B2155/003—Flexible containers made from webs starting from tubular webs
• • 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
  • B31B2160/00—Shape of flexible containers
  • B31B2160/10—Shape of flexible containers rectangular and flat, i.e. without structural provision for thickness of contents
• • 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
• • 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
  • B31B70/92—Delivering
  • B31B70/94—Delivering singly or in succession
  • B31B70/942—Delivering singly or in succession by winding up
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10S493/00—Manufacturing container or tube from paper; or other manufacturing from a sheet or web
  • Y10S493/916—Pliable container
  • Y10S493/927—Reclosable

Definitions

• the present invention relates to the field of manufacturing bags known as “strings”, ie bags connected one after the other at the end of the manufacturing process, but capable of being separated during a subsequent filling step or after it.
• the present invention relates to the manufacture of sachets provided with complementary closure profiles, adapted to alternately allow the opening and closing, on demand, of the sachets.
• the present invention now aims to propose new means designed for the production of bags in a chain.
• a method comprising the steps which consist of sequentially depositing sections of a closure system comprising two complementary closure profiles, transversely on a film intended to form the walls of the bags, and to fix the support webs of these two complementary closure profiles, respectively on the internal faces of the two walls of the bag, taking care to sequentially provide a transverse opening in the film allowing access between the two profiles.
• the method according to the present invention consists in depositing transversely on a film, sections of the closure system having a length of the order of half the width of said film, in cutting the film transversely on substantially half its width on the outside of the closure system, fold the film over itself and fix the support webs of the two profiles of the closure system, respectively on the two walls of the bag.
• the present invention also relates to a machine for implementing the above method, as well as the strings of bags thus obtained.
• This machine comprises means capable of sequentially depositing sections of a closure system comprising two complementary closure profiles transversely on a film intended to form the walls of the bags, and means capable of fixing the support webs of these two closure profiles complementary, respectively on the internal faces of the two walls of the bag, taking care to sequentially provide a transverse opening in the film allowing access between the two profiles.
• the machine according to the present invention preferably comprises means capable of depositing transversely on a film, sections of closure system having a length of the order of half the width of said film, means capable of cut the film over substantially half its width on the outside of the closure system, means capable of folding the film over itself and means capable of fixing the support webs of the two profiles of the closure system, respectively on the two walls of the bag.
• strings of bags comprise sections of the closure system comprising two complementary closure profiles, the support webs of which are fixed transversely respectively to the internal faces of the walls of the bags, an opening being made in the film to allow a access between the two profiles.
• FIGS. 1, 2, 3 and 4 schematically represent four successive stages of a process for manufacturing bags in a chain, in accordance with the present invention
• FIG. 5 represents a variant of the step of FIG. 1, in the event of the offset of the closure profiles
• FIG. 6 schematically illustrates a string of bags according to the present invention
• FIG. 7 represents a cross-sectional view of the mouth of a bag according to the present invention, according to an alternative embodiment according to which the closure profiles are assembled, in the open position,
• FIG. 8 represents a string of bags according to the present invention, arranged in a coil
• FIG. 9 represents a cross-sectional view of a bag according to the present invention produced using two separate film sheets
• FIGS. 10 and 11 show sectional views of closure profiles in accordance with two alternative embodiments of the present invention.
• FIG. 12 represents a similar view of the closing means and illustrates an insulating insert inserted between the support webs to avoid a connection between them,
• FIG. 13 shows another view of the closure means according to a variant comprising support webs of different widths
• FIG. 14 shows another view of such closing means comprising a support web only partially fixed on the film
• FIG. 15 represents a view similar to FIG. 5, of another alternative embodiment
• FIG. 16 shows a later view of the manufacturing process. We will first describe the preferred method of the present invention with reference to Figures 1 to 4 attached.
• FIG. 1 thus illustrates a step which consists in depositing sections 20 of the closure system on a film 10.
• the film 10 is preferably continuously scrolled along the length, that is to say in the direction D.
• the sections 20 of the closure system are deposited transversely on the film 10, that is to say perpendicular to this direction D.
• the closure system sections 20 have a length L1 equal to half the width L2 of the film 10 or substantially equal to half of this width L2.
• FIG. 5 Such a variant with off-center sections 20 is illustrated in FIG. 5.
• the closure profiles 20 can be the subject of numerous alternative embodiments. These are preferably respectively male 22 / female 24 complementary sections carried by respective support webs 21, 23. Such an embodiment is shown diagrammatically in FIG. 10. The structure of such complementary male 22 / female 24 profiles is conventional. in itself and will therefore not be described in more detail below.
• the complementary closure profiles 20 can be formed from hook structures 22a, 22b, 24a, 24b, again carried by respective webs 21 and 23.
• the film 10 is cut transversely and sequentially, near the sections 20, the cut 12 however being limited on the outside of the closing sections 20.
• the sections of the closing sections 20 are centered on the film 10, two aligned cutouts 12 are thus formed each having a length of the order of a quarter of the width L2 of the film
• the cutout 12 is formed in a zone of the film situated outside the bag with respect to the closure profiles 20.
• a line of weakness or precut 14 between the cutting sections 12.
• the purpose of such a line of weakness or precut 14 is to facilitate the separation of bags thereafter.
• This line of weakness or precut 14 can be formed for example of a series of dashes of perforations.
• the film 10 is folded back on itself and the longitudinal edges 15 and 16 of the film 10 are welded together. This weld is referenced 17 in FIG. 3.
• the support web 23 of the upper closure profile 24 is welded to the adjacent wall of the bag formed by the folding of the film 10.
• the two walls of the bag are welded transversely to the level of the bottom 18 of it.
• This weld 18 must of course be carried out at a distance from the sections 20, above the cutting line 12. The distance which separates the sections 20 and the weld 18 defines the depth of the bags.
• closure profiles 20 and fix them on the walls of the bag in the open state, that is to say in a state or both closure profiles 22 and 24 are separated.
• the two closure profiles 22 and 24 are however joined together at their ends, by respective welds 25, 26.
• such a string of bags can be wound on itself before filling, in the form of a coil capable of supplying a packaging machine.
• the means in accordance with the present invention make it possible to produce bags in a chain provided with complementary closure profiles 20, suitable for automatic packaging. These means are simple.
• the means for guiding the rosary can be very simple. In fact, for example, a simple support axis for the reel of the chain of bags is sufficient.
• the support webs 21, 23 can be produced 21 and 23 in the form of a complex structure each comprising an outer layer and an inner layer, in which the outer layer has a lower melting temperature than that of the inner layer.
• the closing system 20 can be fitted with an actuating slider.
• an actuating slider facilitates the handling of the closure profiles 22 and 24, respectively at the opening and at the closing.
• each slider is composed of a sole which carries on one face two lateral wings and a central separation rib which defines in combination with the two lateral wings, two converging / diverging corridors, according to the direction considered, intended to receive respectively one of the sections 22 or 24.
• Each section of the closure system 20 can be pre-equipped with a slider when it is deposited on the film 10.
• the sliders can be added to the closure profiles 20, after fixing them on the film 10, at least after the first support veil 21 is fixed on the film 10. Examples of means suitable for adding a slider can be found in documents EP-A-05101à, EP-A-102301 and EP -A-479661.
• the film 10 (or the sheets 10a and 10b) can be the subject of numerous embodiments. It may be a simple film of thermoplastic material, or even a composite thermoplastic film, that is to say formed by juxtaposition of different layers of different nature, or else a complex film formed for example of coated paper. a layer of plastic or a metallized film.
• the two sheets 10a, 10b care must be taken to provide in at least one of the two sheets 10a, 10b, a cutout allowing access to the closure profiles 20 or else route this sheet (preferably the top sheet 10b). in the form of successive sections whose length corresponds to the depth of the sachets.
• the two sheets 10a and 10b are welded along their two longitudinal edges 15, 16, as shown diagrammatically at 17a and 17b in FIG. 9.
• the connections previously described, in particular the connection of the walls of the bag, on the outside of the closure profiles 20, transversely, after filling the bags can be produced not by thermal welding, but by bonding.
• a strip of suitable glue preferably a strip of self-adhesive material.
• this strip of adhesive material can be covered with a strip of peelable film.
• the complementary profiles 22, 24 are not facing each other, but are aligned, that is to say that they are encountered successively when the film 10 is traversed along its width .
• the two support webs 21 and 23 which respectively carry the closure sections 22 and 24 are then preferably welded simultaneously to the film and not successively as indicated above.
• the sections 22 and 24 can be formed of separate sections routed successively on the film or be connected, joined, in the position illustrated in FIG. 15, when they are simultaneously conveyed on this film 10.
• the profiles 22, 24 are arranged opposite thereafter, during the step of folding the film 10 on itself as illustrated in FIG. 16. During this operation, the profiles 22 and 24 can be brought into engagement, or alternatively be kept opposite but separate, their engagement then being operated later only after filling the bag.
• the film 10 is split over half of its width before being folded back on itself to form the transverse opening necessary to allow access between the sections 22 and 24.
• this cut 12 is preferably extended by a line of weakness 14 to facilitate the subsequent separation of the sachets.

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• Making Paper Articles (AREA)
• Bag Frames (AREA)

Applications Claiming Priority (3)

Publications (2)

Family

ID=9528522

Family Applications (1)

Country Status (15)

Cited By (2)

Families Citing this family (15)

Family Cites Families (16)

• 1998
  • 1998-07-10 FR FR9808884A patent/FR2780913B1/fr not_active Expired - Lifetime
• 1999
  • 1999-07-09 ES ES99929457T patent/ES2189437T3/es not_active Expired - Lifetime
  • 1999-07-09 AU AU46268/99A patent/AU749778B2/en not_active Ceased
  • 1999-07-09 US US09/720,251 patent/US6789374B1/en not_active Expired - Lifetime
  • 1999-07-09 EP EP99929457A patent/EP1094932B1/de not_active Expired - Lifetime
  • 1999-07-09 BR BR9911967-6A patent/BR9911967A/pt not_active IP Right Cessation
  • 1999-07-09 AP APAP/P/2001/002029A patent/AP2001002029A0/en unknown
  • 1999-07-09 JP JP2000558969A patent/JP4644369B2/ja not_active Expired - Fee Related
  • 1999-07-09 DE DE69905893T patent/DE69905893T2/de not_active Expired - Lifetime
  • 1999-07-09 WO PCT/FR1999/001678 patent/WO2000002722A1/fr active IP Right Grant
  • 1999-07-09 NZ NZ509279A patent/NZ509279A/en not_active IP Right Cessation
  • 1999-07-09 AT AT99929457T patent/ATE234195T1/de not_active IP Right Cessation
  • 1999-07-09 CN CN99808469A patent/CN1107587C/zh not_active Expired - Fee Related
  • 1999-07-09 DK DK99929457T patent/DK1094932T3/da active
  • 1999-07-09 CA CA002337811A patent/CA2337811C/fr not_active Expired - Fee Related

Non-Patent Citations (1)

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