EP0667288B1 - Vorrichtung und Verfahren zum Verpacken von Produkten in hermetischen, wiederverschliessbaren Verpackungen - Google Patents

Vorrichtung und Verfahren zum Verpacken von Produkten in hermetischen, wiederverschliessbaren Verpackungen Download PDF

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Publication number
EP0667288B1
EP0667288B1 EP95400289A EP95400289A EP0667288B1 EP 0667288 B1 EP0667288 B1 EP 0667288B1 EP 95400289 A EP95400289 A EP 95400289A EP 95400289 A EP95400289 A EP 95400289A EP 0667288 B1 EP0667288 B1 EP 0667288B1
Authority
EP
European Patent Office
Prior art keywords
film
segments
heat sealing
strip
closure strip
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
EP95400289A
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English (en)
French (fr)
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EP0667288A1 (de
Inventor
Henri Bois
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.)
Flexico France SARL
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Flexico France SARL
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Filing date
Publication date
Application filed by Flexico France SARL filed Critical Flexico France SARL
Publication of EP0667288A1 publication Critical patent/EP0667288A1/de
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Publication of EP0667288B1 publication Critical patent/EP0667288B1/de
Anticipated expiration legal-status Critical
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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
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B9/00—Enclosing successive articles, or quantities of material, e.g. liquids or semiliquids, in flat, folded, or tubular webs of flexible sheet material; Subdividing filled flexible tubes to form packages
    • B65B9/10—Enclosing successive articles, or quantities of material, in preformed tubular webs, or in webs formed into tubes around filling nozzles, e.g. extruded tubular webs
    • B65B9/20—Enclosing successive articles, or quantities of material, in preformed tubular webs, or in webs formed into tubes around filling nozzles, e.g. extruded tubular webs the webs being formed into tubes in situ around the filling nozzles

Definitions

  • the invention relates to the packaging of products in sealed reclosable packages consisting of a flexible rectangular bag formed by two portions of film provided with a closing profile.
  • Such sachets generally include two portions of a film folded back on itself, closed longitudinally by welding and welded transversely on lateral sides parallel to each other and orthogonal to the longitudinal weld and to the closing profile.
  • the longitudinal closure profile is generally attached and welded to the film, parallel to the longitudinal weld.
  • the closure profile is generally a waterproof profile resealable comprising a male part and a female part already engaged or not, this profile can also be optionally provided ribs or other profiles allowing easy opening of the packaging.
  • the invention will be described in the context of packaging of a product operated simultaneously with the manufacture of sachet, the invention can also be applied to the manufacture of empty sachets, simply by omitting the step of placement of the product to be packaged.
  • the solution generally adopted consists of providing, between the step of transferring and welding the profile onto the film of the bag and that of transverse welding of the lateral sides, an intermediate step of pre-crushing of the ends of the profiles in the critical region located in the extension of the lateral sides.
  • the subsequent welding step should be slowed down because the amount of material provided by this part of the crushed profile requires an additional thermal contribution, therefore a longer application time along the welding jaws.
  • EP-A-0 528 721 proposes a different technique, consisting in feeding the profile no longer continuously, but by profile sections of length less than that of the bag to hold account for the distance between the transverse welds.
  • profile sections are brought to the machine on a support strip whose dimensions are greater than those of the profiles, both in the longitudinal direction and in the transverse direction; the profile is no longer welded directly to the bag, but via of this backing strip, which only creates in the end regions only a little extra thickness.
  • the support strip is, in section, more uniform than the profile, it nevertheless creates an extra thickness, so than the disadvantages of the usual technique (with crushing edges of the profiles), if they are attenuated, they are not deleted.
  • the synchronization of the film supply plastic with the backing strip is very delicate, and any offset (whether due to desynchronization or, for example, poor control of the elongation under tension of the support strip and of the film) causes a risk of welding on the profiles and therefore leakage.
  • this process is ill-suited to changes in length bag, profile width, etc., the preconditioning of the support strip and the machine setting to be changed each time time.
  • the object of the invention is to overcome all of the disadvantages of known techniques, by proposing a method and a packaging machine to completely eliminate the step pre-welding of conventional processes, ensuring positioning perfect profile without any risk of loss of sealing at the ends of it, and which is very easily modifiable according to the choice of profile and bag length.
  • the method of the invention is therefore of the generic type comprising the steps, carried out step by step and synchronously, consisting in: (a) unwinding longitudinally a continuous strip of film: (b) longitudinally folding this strip of film over it- even, in tubular form and join by welding the two longitudinal edges of the film; (c) longitudinally welding a closure profile to the film; (d) transversely weld the tubular film at regular intervals, along d a solder joint; and (e) cut the film transversely at the location of the transverse seal so as to individualize and separate the bags;
  • the closure profile is sectioned in a sequence of length equal to the length of the bag minus the width, in transverse direction, of the weld joint produced at the step (d) and prior to step (c) the individualized segments of the closure profile are introduced between two adjacent sheets of the film folded back on itself, so that the film training participates in the synchronous drive of said segments of closure profiles up to at the welding station carrying out the step (c) and that the transverse welds are formed in the intervals separating the successive segments.
  • the closing profile can be routed on the film under shape of precut segments.
  • the closing profile is preferably conveyed in the form of a continuous strip cut into segments during an intermediate stage prior to l step (c), also offset step by step and in synchronism with the other steps.
  • step (c) there is further provided a step additional consisting in checking the longitudinal positioning of the profile segment relative to the film.
  • the invention also relates to a packaging machine, comprising the means of synchronized implementation of the different above steps.
  • L invention finally relates to sachets of packaging obtained by the implementation of this process.
  • Figure 1 is a partial plan view of a sachet obtained by implementing a conventional packaging process.
  • Figure 2 illustrates a machine for the implementation of such a conventional process.
  • Figures 3, 4, 5 and 6 are schematic sections taken at level of lines III-III, IV-IV, V-V and VI-VI of figure 2.
  • FIG. 7 illustrates a machine for implementing the method of the invention.
  • Figure 8 shows in more detail the upper part of the machine of figure 7.
  • Figure 9 is equivalent to Figure 1, for a bag made by implementing the method of the invention.
  • Figure 10 schematically illustrates the relationship between the advance successive segments of cut profile and advances in lengths not sachets.
  • Figure 1 is a partial view of a bag made by setting work of a conventional process, such as that described by the documents US-A-4,756,629, US-A-5,024,537 and EP-A-0 302,144 cited above, by means of the machine illustrated schematically in Figure 2.
  • the raw material is a reel of film, printed or not, continuously supplied from an unwinder delivering a flat sheet 1.
  • This flat sheet is brought to a forming and filling station 2 where the tablecloth is folded on itself so as to form on a compound tube essentially two continuous sheets 3, 4 which will constitute the two walls of the bag when it is individualized.
  • a forming and filling station 2 where the tablecloth is folded on itself so as to form on a compound tube essentially two continuous sheets 3, 4 which will constitute the two walls of the bag when it is individualized.
  • we preferably at this same station filling the product with condition 5, which will be enclosed between the two sheets 3, 4 of film folded by the forming neck of station 2.
  • the first welding station is used to fix the longitudinal edges of the film, to longitudinally close the tube thus formed.
  • This welding station 7 can also be used to fix the closing profile 6 on the sheets 3, 4 of the film when this profile 6 is placed in an edge region of the film.
  • the closure profile 6 can be fixed to the film 1 to 1. using additional welding means, similar to means 7, when the closure profile 6 is placed at a distance from the edge region of the film. This stage does not pose any particular difficulty, since it is carried out over a length of film and section of uniform section, without protrusion; the heating jaws 8 are positioned in the direction of the unwinding of the film and carry out the welding by thermal input and transverse pressure, as can be seen in the section of FIG. 3.
  • pre-welding is essential in this conventional machine to crush ends of the profiles in the area where the welding will be carried out transverse, as explained in detail in the introduction to the present description.
  • two heating jaws 10 come, by mechanical, ultrasonic pressure, hydraulic or pneumatic, crush the section of profiles 6 which will later find in region 11 of the transverse weld operated downstream. It is, as can be seen in Figure 1, to flatten to better region 12 in order to standardize the transverse profile as much as possible of the bag in region 11 where the sides of the bag will be welded.
  • Figure 5 shows the appearance of the film-profile assembly after passage to the pre-welding station 9, with the crushed regions 13 and 14: as we can see, as it is a simple crush without removal of material, and as we just spread it, it will always remain, in transverse profile, surface inequalities which can later create leaks detrimental to the seal of the bag completed.
  • the next step, carried out at station 15, consists in carrying out the transverse weld (edge region 11 of the bag), which will thus seal packaging. This is done by compression between transverse heating jaws 16 (shown in section in the figure 6).
  • this step weld, however, poses the risk of imperfections, because it is carried out, as we have just explained, on a surface presenting at profile level a spread of material generating an extra thickness (referenced 17 in the section of FIG. 6) preventing a distribution uniform pressure support and heat transfer required to good weld quality.
  • the duration of application of jaws 16 should be extended, further slowing the rate of machine production.
  • the final step is to separate the bags 18, now individualized, by means of a separation blade which detaches the bags by separating them from the initial strip.
  • the invention essentially proposes to delete part of the profile in the transverse weld area this weld can then be carried out on a section with constant profile, without any extra thickness since the packaging obtained will no longer have a profile in this area.
  • the welding times will be reduced (because the sections to weld will have a constant profile) and the quality will be significantly improved, by eliminating any risk of flight to these regions.
  • FIGS. 7 and 8 provision is made, as illustrated in FIGS. 7 and 8, to place closure profiles routed in the form of d in the running circuit.
  • a continuous strip immediately upstream of the forming neck of station 2, a system making it possible to cut segments of sections simultaneously with their routing.
  • this system, referenced 18, comprises two assemblies 19 with belt and pulley coming to grip the continuous profile 6 and pass it in front of a shears 20 combined with upstream guides 21 and downstream 22.
  • profile segments are immediately introduced between the two sheets of film 3, 4, so that they participate in the synchronous drive of these segments to the associated welding station.
  • This welding station can be formed from station 7 if the closure profile is placed on an edge region of the film, as indicated previously, or else an additional welding station. So according to l invention he n it is not necessary to provide special means for supporting the individualized segments of closure profile during this process; downstream of this welding station 7, the profile segments are in the film and travel at the same time as the latter and at the same speed.
  • the synchronization of station 18 with the rest of the machine is made, in itself known manner, from coders, cells photoelectric, etc. and possibly automatons adapted to precision required.
  • means are provided to verify the correct longitudinal positioning of the profile segments relative to the film, in order to immediately notify the operator in the event of a shift so that he can intervene immediately and adjust the machine setting.
  • An additional advantage of the development of the invention is due to the fact that it can be directly adapted to a machine pre-existing, simply by adding the cutting system synchronized 18 immediately upstream of the forming neck of station 2 and by removing or deactivating the pre-welding station 9 (shown for this reason in dotted lines in Figure 7), now become unnecessary.
  • the closure profile 6 n is not routed in a continuous strip and cut in situ step by step immediately before the welding station using means 18, but the closure profile 6 is precut on a separate machine.
  • the cutting station 18 n is not necessary upstream of the forming neck 2.
  • the means of routing comprising a belt and pulley assembly 19 according to the embodiment described above can make the subject to many variations.
  • the longitudinal weld closing longitudinally l packaging can be provided either on an edge of the packaging leading to one end of the transverse welds, or anywhere along the length of the packaging and therefore opening out along the length of the transverse welds.
  • the closure profile 6 can be placed either on an edge of the packaging leading to one end of the transverse welds, or anywhere along the length of the packaging and therefore opening out along the length of the transverse welds.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Containers And Plastic Fillers For Packaging (AREA)
  • Auxiliary Devices For And Details Of Packaging Control (AREA)
  • Making Paper Articles (AREA)
  • Packages (AREA)
  • Vacuum Packaging (AREA)

Claims (10)

  1. Verfahren zum Verpacken von Produkten in dichten, wiederverschließbaren Verpackungen, welche durch einen flexiblen rechteckigen Beutel gebildet werden, welcher aus zwei mit einem Verschlußprofil versehenen Folienabschnitten gebildet ist, welches, schrittweise und synchron ausgeführt, die folgenden Schritte aufweist:
    a) Abrollen eines kontinuierlichen Folienbandes (1) in Längsrichtung,
    b) Zusammenbiegen dieses Folienbandes (1) longitudinal zu einer Rohrform und Verbinden der zwei Längsränder der Folie durch Schweißen,
    c) Verschweißen eines Verschlußprofils (6) mit der Folie (1) in Längsrichtung,
    d) Schweißen der rohrförmigen Folie (1) in Querrichtung in regelmäßigen Abständen (11) entlang eines Schweißstoßes und
    e) Abschneiden der Folie (1) in Querrichtung an dem Ort des querverlaufenden Schweißstoßes (11), so daß die Beutel individualisiert und getrennt werden,
    dadurch gekennzeichnet, daß das Verschlußprofil (6) in Segmente mit einer Länge, welche gleich der Länge des Beutels, verringert um die Breite dem Schweißstoßes in Querrichtung, ist, der in Schritt d) realisiert wird, vor Schritt c) unterteilt wird, wobei die individualisierten Segmente des Verschlußprofils (6) zwischen zwei benachbarten Blättern (3, 4) der zusammengebogenen Folie (1) derart eingeführt werden, daß der Antrieb der Folie an dem synchronen Antrieb der Verschlußprofilsegmente bis zu dem Schweißgerät partizipiert, welches den Schritt c) realisiert, und daß die Querverschweißungen in den Intervallen ausgebildet werden, welche die aufeinanderfolgenden Segmente trennen.
  2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß das Verschlußprofil (6) der Folie (1) in der Form von vorher zugeschnittenen Segmenten zugeführt wird.
  3. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß das Verschlußprofil (6) in der Form eines kontinuierlichen Bandes zugeführt wird und zu Segmenten während eines Zwischenschritts vor dem Schritt c) geschnitten wird, welcher ebenfalls schrittweise und synchron mit den anderen Schritten ausgeführt wird.
  4. Verfahren nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß es weiterhin den Zusatzschritt enthält, die Position des Profilsegmentes hinsichtlich der Längsrichtung bezüglich der Folie zu verifizieren.
  5. Vorrichtung zum Verpacken von Produkten in dichten, wiederverschließbaren Behältern, welche aus einem flexiblen rechteckigen Beutel bestehen, welcher aus zwei Abschnitten einer Folie gebildet wird, die mit einem Verschlußprofil versehen sind, welche umfaßt:
    eine Einrichtung zum Abrollen eines kontinuierlichen Folienbandes (1) in Längsrichtung,
    eine Einrichtung zum Zusammenbiegen dieses Folienbandes (1) longitudinal zu einer Rohrform und zum Verbinden der zwei Längsränder der Folie durch Schweißen,
    eine Einrichtung zum Verschweißen eines Verschlußprofils (6) mit der Folie (1) in Längsrichtung,
    eine Einrichtung zum Schweißen der rohrförmigen Folie in regelmäßigen Abständen in Querrichtung entlang eines Schweißstoßes und
    eine Einrichtung zum Abschneiden der Folie in Querrichtung an der Stelle des querverlaufenden Schweißstoßes derart, daß die Beutel individualisiert und getrennt werden,
    dadurch gekennzeichnet, daß sie eine Versorgungseinrichtung (18, 19), welche dafür vorgesehen ist, die Schweißeinrichtung mit dem Profil in Profilsegmenten mit einer Länge zu versorgen, welche gleich der Länge des Beutels, verringert um die Breite des Schweißstoßes, bezogen auf die Querrichtung, ist, welcher durch die Einrichtung zum Schweißen in Querrichtung realisiert wird, und eine Einrichtung aufweist, welche dafür geeignet ist, die individualisierten Verschlußprofilsegmente vor ihrer Befestigung durch Verschweißen zwischen zwei benachbarte Blätter (3, 4) der zusammengebogenen Folie derart einzuführen, daß der Antrieb der Folie an dem synchronen Antrieb der Verschlußprofilsegmente bis zu dem zugehörigen Schweißgerät partizipiert, und daß die aufeinanderfolgenden Segmente so angeordnet werden, daß zwischen ihnen ein Intervall für den querverlaufenden Schweißstoß verbleibt.
  6. Vorrichtung nach Anspruch 5, dadurch gekennzeichnet, daß die Versorgungseinrichtung dafür eingerichtet ist, vorher zugeschnittene Verschlußprofilsegmente der Folie (1) zuzuführen.
  7. Vorrichtung nach Anspruch 5, dadurch gekennzeichnet, daß die Versorgungseinrichtung eine Einrichtung zum Zuführen eines kontinuierlichen Bandes eines Verschlußprofils und eine Einrichtung (20) zum Unterteilen des kontinuierlichen Verschlußprofilbandes in Segmente vor der zugehörigen Schweißeinrichtung aufweist.
  8. Vorrichtung nach einem der Ansprüche 5 bis 7, dadurch gekennzeichnet, daß sie eine Einrichtung zum Verifizieren der Position der abgeschnittenen Profilsegmente hinsichtlich der Längsrichtung bezüglich der Folie (1) aufweist.
  9. Vorrichtung nach einem der Ansprüche 5 bis 8, dadurch gekennzeichnet, daß sie eine Einrichtung zum Zuführen von abgeschnittenen Profilsegmenten zwischen zwei Blätter (3, 4) der Folie (1) aufweist, welche durch eine Riemenantriebseinheit (19) gebildet wird.
  10. Dichte, wiederverschließbare Verpackung, gewonnen durch das Ausführen des Verfahrens entsprechend einem der Ansprüche 1 bis 4 oder mit Hilfe der Vorrichtung gemäß einem der Ansprüche 5 bis 9.
EP95400289A 1994-02-14 1995-02-13 Vorrichtung und Verfahren zum Verpacken von Produkten in hermetischen, wiederverschliessbaren Verpackungen Expired - Lifetime EP0667288B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9401630A FR2716158B1 (fr) 1994-02-14 1994-02-14 Machine et procédé de conditionnement de produits dans des emballages étanches refermables.
FR9401630 1994-02-14

Publications (2)

Publication Number Publication Date
EP0667288A1 EP0667288A1 (de) 1995-08-16
EP0667288B1 true EP0667288B1 (de) 1998-04-22

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EP95400289A Expired - Lifetime EP0667288B1 (de) 1994-02-14 1995-02-13 Vorrichtung und Verfahren zum Verpacken von Produkten in hermetischen, wiederverschliessbaren Verpackungen

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Country Link
EP (1) EP0667288B1 (de)
AT (1) ATE165294T1 (de)
DE (1) DE69502121T2 (de)
ES (1) ES2116689T3 (de)
FR (1) FR2716158B1 (de)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1295627B1 (it) 1997-10-17 1999-05-24 Ica Spa Soc Procedimento per applicare un segmento di zip chiuso all'interno di un contenitore di materiale flessibile durante il suo confezionamento.
FR2770487B1 (fr) 1997-11-06 2000-02-04 Flexico France Sarl Machine de formation, remplissage et fermeture automatique de sacs, a profiles de fermeture transversaux
US6286189B1 (en) † 1999-05-10 2001-09-11 Pactiv Corporation Zipper and zipper arrangements and methods of manufacturing the same
AU4103399A (en) * 1999-05-24 2000-12-12 Nigel Ervine Claxton Web structure and the production of a web structure
EP1106506B1 (de) 1999-12-03 2004-03-17 SIG Pack Systems AG Verfahren und Vorrichtung zur Herstellung von 3-Siegelrandbeuteln mit eingeschweisstem Verschlussprofil
US7244222B2 (en) 2004-03-05 2007-07-17 S.C. Johnson Home Storage, Inc. Apparatus for and method of positioning a slider on mating zipper elements
US7163133B2 (en) 2004-03-05 2007-01-16 S.C. Johnson Home Storage, Inc. Apparatus for and method of moving a slider along mating zipper elements
DE102009008129A1 (de) * 2009-02-09 2010-10-07 Focke & Co.(Gmbh & Co. Kg) Verfahren und Vorrichtung zur Herstellung von Beuteln
DE102011106301A1 (de) * 2011-07-01 2013-01-03 Lemo Maschinenbau Gmbh Beutel und Verfahren zu seiner Herstellung
CN112839876A (zh) * 2018-10-15 2021-05-25 Gea食品策划韦尔特公司 具有重新封口装置分段的袋子
ES2887073T3 (es) 2019-11-25 2021-12-21 Ulma Packaging Tech Ct Coop Máquina de envasado para generar envases recerrables

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4876842A (en) * 1988-01-15 1989-10-31 Minigrip, Inc. Method of and apparatus for packaging product masses in a form, fill and seal machine
CA2070937C (en) * 1991-08-09 1998-09-15 Paul Tilman Reclosable plastic bags and method of making same utilizing discontinuous zipper profile disposed along a continuous carrier strip

Also Published As

Publication number Publication date
ES2116689T3 (es) 1998-07-16
FR2716158A1 (fr) 1995-08-18
FR2716158B1 (fr) 1996-05-10
ATE165294T1 (de) 1998-05-15
DE69502121T2 (de) 1998-12-03
DE69502121D1 (de) 1998-05-28
EP0667288A1 (de) 1995-08-16

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