EP0995695A1 - Beutel für Nahrungsmittel aus abziehbaren Folien und Verfahren zur Hestellung - Google Patents

Beutel für Nahrungsmittel aus abziehbaren Folien und Verfahren zur Hestellung Download PDF

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Publication number
EP0995695A1
EP0995695A1 EP99113038A EP99113038A EP0995695A1 EP 0995695 A1 EP0995695 A1 EP 0995695A1 EP 99113038 A EP99113038 A EP 99113038A EP 99113038 A EP99113038 A EP 99113038A EP 0995695 A1 EP0995695 A1 EP 0995695A1
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EP
European Patent Office
Prior art keywords
packaging
film
product
sealing
order
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.)
Granted
Application number
EP99113038A
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English (en)
French (fr)
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EP0995695B1 (de
Inventor
Paolo Fioravanti
Fréderic Mauclair
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PFM SpA
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PFM SpA
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Application filed by PFM SpA filed Critical PFM SpA
Priority to DE29923644U priority Critical patent/DE29923644U1/de
Priority to CA 2288498 priority patent/CA2288498C/en
Publication of EP0995695A1 publication Critical patent/EP0995695A1/de
Priority to US09/900,290 priority patent/US6688078B2/en
Application granted granted Critical
Publication of EP0995695B1 publication Critical patent/EP0995695B1/de
Anticipated expiration legal-status Critical
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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
    • B65D75/00—Packages comprising articles or materials partially or wholly enclosed in strips, sheets, blanks, tubes, or webs of flexible sheet material, e.g. in folded wrappers
    • B65D75/04—Articles or materials wholly enclosed in single sheets or wrapper blanks
    • B65D75/20—Articles or materials wholly enclosed in single sheets or wrapper blanks in sheets or blanks doubled around contents and having their opposed free margins united, e.g. by pressure-sensitive adhesive, crimping, heat-sealing, or welding

Definitions

  • the present invention relates to a peelable film pouch or packaging to be used for storage of food products at large, advantageously cheese, said pouch or packaging having such a conformation that once opened, it can be closed more than once for the preservation of freshness and flavour of the food therein contained.
  • the present invention relates to a process for the production of a peelable film pouch or packaging of the type mentioned above.
  • the present invention relates to a machine suitable for carrying out said process.
  • the present invention finds a particularly suitable employment in the field of food industry and in that of food packaging.
  • Packagings for storage of foodstuffs in general are known in the art, said packagings being made of a suitable plastic film and obtained by sealing, according to well-known techniques in the field.
  • a typical packaging process is accomplished by an automatic machine called "flow-pack", wherein, once placed in a horizontal position, a certain produce is made to move forward along a suitable conveyor whilst a plastic film is unwrapped from a suitable support spool and suitably shaped in such a way to wrap the produce itself.
  • a suitable bag forming means is present, and this is generally made of a tubular plate, which is suitable for folding the packaging plastic film so as to allow the packed product to be introduced into said tubular plate and wrapped in the plastic film after that.
  • the plastic film is initially made to undergo a first sealing operation which is longitudinal with respect to the forward direction followed by the product itself.
  • Said first sealing operation is generally carried out by using a plurality of coupled rollers which are positioned opposite to each other and on both sides of the product so as to act on both sides of the plastic packaging film.
  • said rollers normally comprise a first couple of rollers that accomplish their function of leading the sliding of the film, a second couple of rollers that carry out the longitudinal sealing operation of the film, along the advancement direction of the product, a third couple of rollers equippped with a cutting blade in order to eliminate the portions of film that are found beyond the sealed edges, and a fourth couple of rollers generally made of rubber for dragging the film itself.
  • said first sealing operation can be carried out by means different from those described above, that is by sealing blocks.
  • a second sealing is carried out transversally with respect to the forward motion of the product, so as to obtain a first short side of a given packaging; this second sealing is carried out by means of a couple of sealing plates which are placed downstream from said rollers.
  • said sealing plates are fixed onto a moving mechanism that goes forward in parallel with the product in such a way that the plates remain in contact with the film to be sealed for a predetermined length of time; in case the product advances intermittently, the sealing plates are uniquely capable of a back and forth movement towards each other.
  • the plates are opened and, in case of intermittent advancement of the product, this is made to move forward stepwise, so that said sealing plates can be closed again downstream from the product in order to be capable of carrying out a third sealing operation which is transversal to the forward motion, in so doing obtaining the short side of the packaging.
  • the mechanism on which the sealing plates are fixed causes their withdrawal and their closing exactly in correspondence with the second side to seal.
  • the plastic film cutting operation is carried out and so the product results to have been adequately packed and and it is ready for the following packaging and storage phases.
  • a controlled atmosphere is generally obtained employing a gas or a mixture of gases among which there are nitrogen, carbon dioxide, and oxygen, said gases being used as they hinder the oxidation phenomena involving pigments, flavours and fats of the product, as well as to delay the growth and reduce the proliferation rate of molds and aerobic bacteria.
  • the gas or the mixture of gases employed are suitably blown in during the packaging process, down an injection tube positioned downstream from the first longitudinal sealing operation and immediately upstream from the sealing plates that accomplish the transversal sealing, to obtain a perfectly airtight packaging.
  • a first important drawback of certain solutions known in the art is constituted by the packaging being formed by coupling two plastic films which are simultaneously unwrapped from two separate reels.
  • the type of packaging having a zipper placed inside of the sealed area presents more than few disadvantages because the positioning of the lock below the longitudinal sealing does not guarantee a perfect airtightness of the packaging just as on the other hand it results to be necessary in order to preserve the food product therein contained.
  • the known packagings provided with a zipper placed outside of the sealing line involve other disadvantages and drawbacks which are essentially due to the fact that when the film is folded in order to form the pouch, the welding operation is carried out between respective inner and outer portions of the film; by way of example, in a pouch made of multi-layer peelable film constituted by an inner polyethylene layer and an outer polypropylene layer, when the inner and outer layers are welded to each other the resulting chemical link is often not very homogeneous and the airtightness of the inner part of the pouch cannot be guaranteed.
  • the zip cannot be considered to be an airtight closing means.
  • plastic films used for the accomplishment of the packagings of the prior art are generally chosen in the group comprising: polyethylene, polypropylene, polystyrene, polyvinylchloride, polyvinylidene chloride, polyesters, polyamides.
  • plastic films resorted to are laminates coupled to form a multilayer structure of the polypropilene/polyethylene or polyester/polyethylene, or further of the polyamide/polyethylene types.
  • the sealing material used which is normally constituted by polyethylene, does not indeed allow the sealing to be delaminated and the consumer cannot therefore avail of the sealing lines such as those which are to be followed during the opening of the packaging itself.
  • the product which has not been consumed is unavoidably in contact with the outside environment, provided that the packaging is still in such a condition to be used, i.e. if it has not been completely destroyed at that stage.
  • the present invention aims at overcoming the problems, drawbacks and disadvantages of the prior art by proposing an airtight packaging for foodstuffs in general, advantageously for cheese, said packaging being suitable for being opened with no tearing involved, said packaging further being closable more than once, in so doing safeguarding the correct preservation and keeping of the product therein contained, said packaging further having its longitudinal sealing located along one of its small faces, this making it possible for an easier reding to be made of the information relative to the product that is printed on the packaging itself.
  • a further aim of the present invention is to provide a process for the production of pouches or packagings for foodstuffs on an industrial scale and on a continuous basis, said process being viable both by dint of a flow-pack machine with a horizontal advancement of the product to be packed, and of a packaging machine of the vertical type, wherein the product to be packed is unloaded from up above into a packaging that forms beneath the container where the product to be packed is found, at regular intervals of time.
  • a further object of the present invention is to propose a packaging machine of the "flow-pack" type which is capable of carrying out the sealing operation of a packaging which is formed around a product motioned on a small face thereof on the conveyor.
  • the pouch or packaging for the storage of foodstuffs according to the present invention is manufactured starting from a single film of the peelable type with a high sealability degree, and advantageously with a high impermeability degree, so as to allow said pouch or packaging to have the necessary airtightness for the keeping of a modified atmosphere.
  • the peelability of said film allows the user to open said packaging by delaminating the sealing, that is detaching the limbs of which above by applying a traction force to them.
  • the user has therefore access to the product without running any risk of tearing the packaging at the time of opening, which is just what happens to the packagings of the prior art because of the high resistance offered by the materials they are made of, said materials not allowing to be delaminated along any of their sealing lines.
  • the peelable film consists of an oriented polyamide first layer which is coupled with a coextruded peelable polyethylene layer, like for example that produced by the German firm Südpburg GmbH, Ochsenhausen.
  • the first oriented polyamide layer has a thickness of approx. 15 ⁇ m
  • the second coextruded peelable polyethylene layer has a thickness of approximately 60 ⁇ m.
  • the sealing between the two portions of said peelable film to form a packaging is carried out on the inner polyethylene side.
  • the packaging for foodstuffs, advantageously cheese, obtained with the above described peelable film has a first limb which is higher than the second limb, therefore said first limb being advantageously suitable for being folded over said second limb.
  • Said second foldable limb is in fact engaged with the packaging by suitable folding means, an adhesive layer for example, that make it possible to achieve an effective sealing of the packaging to resort to at the moment when this has already been opened once or more.
  • Said closing operation has in fact the undoubted advantage to be suitable for being repeated more than once, making it possible for the user to help himself with the product contained in said packaging at different moments; in such a way, the user is not forced to resort to other means like other containers or different types of film in order to preserve the product or to fully consume said product, after the packaging that contains has been opened for the first time, in so doing not running the risk of having it deteriorating after direct contact with air and/or losing its own specific taste with time.
  • the process for the production of said packaging involves the employment of a "flow-pack" type machine with a horizontal advancement of the product, equipped with a suitable forming means which is suitable for getting the packaging ready, said packaging consisting of a peelable film suitably unwrapped from a suitable reel, the product to be packed being motioned in such a way that one of its small faces lies on the conveyor.
  • the peelable film is wrapped around the forming means in such a way that a first limb of said film has a height which is higher than that of a second limb.
  • the product On leaving the forming means the product is therefore wrapped with the peelable film in an asymmetrical fashion, whereas a suitable series of rollers is suitable for facilitating the sliding of said film and further suitable for performing a first vertical sealing, that is a sealing that has been executed on the film along its advancement direction.
  • Said first sealing operation is carried out at a slightly lower level than that of the height of said second limb, so that during the first packaging opening phase, a given user can avail of the unsealed surface of said first and second limbs as a valid hand grip for an easier and faster access to the product.
  • a gas or a suitable mixture of gases is pumped in so as to create a modified atmosphere.
  • the film gets to a couple of sealing plates which are suitable for carrying out a second sealing in the transversal direction which is itself suitable for yielding the first short side of the packaging.
  • the sealing plates are fixed to a mechanism that sets and keeps them in motion, which operates motioning the plates so as to make them follow a rotary motion around perpendicular axes.
  • the speed of rotation is in coordination with the advancement speed of the products on the conveyor and it accounts for the length of each unit of product so as to act exactly in correspondence with the ends thereof.
  • the film is cut by a blade which the sealing plates are equipped with, or, according to a further form of embodiment, by a mechanism which is separate therefrom.
  • each of the sealing plates is made so as to be integral with cylinders that rotate at an angular speed that is synchronised with the speed with which the product advances on the conveyor, so as to complete a rotation around its own axis for each unit of product that passes by.
  • each sealing plate is provided with a blade which is suitable for cutting the film made of plastic material, said blade being positioned at equal distances from the edges of the sealing plate, and being integral to it.
  • the peelable film is suitably cut as described above and the first limb, that is the longer limb, is folded over onto the packaging; at that stage a suitable equipment applies an adhesive label onto said first limb so as to allow its coupling to the packaging which is then ready for packaging and storing.
  • the packaging according to the present invention is provided with a zip mechanical closing system, which is itself also made of a plastic material, said closing system being of an already known type and generally employed in the packaging field at large.
  • said zip is located ouside of the first longitudinal sealing and not within the sealed area containing the product, as it happens for some packagings known in the art.
  • the positioning of the zip outside of said first sealing results to be extremely advantageous because of the fact that it is located in an area of the packaging which is not involved in containing the product and the modified atmosphere that surrounds it.
  • the process for the production of the zip equipped pouches or packagings involves the employment of a forming means constituted by a tubular plate that the wraps the peelable film around the product to pack in a symmetrical manner, that is without leaving a first limb which is more protruding than the other, as described in the case represented by the first form of embodiment mentioned above.
  • the peelable film wraps the product and a plurality of rollers make the film itself advance and further carry out the first longitudinal sealing of ot in a way which is analogous with that of the process which has just been described above.
  • a gas or a mixture thereof is blown into the film, said gas or mixture thereof being suitable for creating the desired modified atmosphere and, furthermore, the zip is positioned in the area of the packaging that results to be above said longitudinal sealing.
  • Said zip can be positioned by respectively sealing the two male and female elements that it consists of with both the two limbs of the film, or sealing the support element to which the zip can be advantageously coupled onto them.
  • the packaging keeps advancing towards a couple of sealing plates (that can be of the rotational type, as detailed above) , which are brought closer to the packaging in order to carry out said sealings of the second and third transversal types so as to close the two short sides of the packaging and to obtain a complete airtightness of said packaging.
  • a couple of sealing plates that can be of the rotational type, as detailed above
  • the film is transversally cut, and the packaging which is obtained by it results to be ready for the following packaging and storage phases.
  • reference signs 10, 20 generally indicate a pouch or packaging made of peelable film according to the present invention.
  • FIG. 1 a first form of embodiment is shown of the foldable packaging 10 according to the present invention.
  • a packaging 10 made of a peelable film 11 consisting of an oriented polyamide first layer which is coupled with a coextruded peelable polyethylene layer can be produced by wrapping said film 11 around a certain product 12 passing through a suitable tubular forming means (not shown in the figure), said wrapping being carried out so as to obtain a first limb 11' and a second limb 11'' having different heights.
  • the first limb 11' which is higher than the second limb 11'', is suitably folded over said second limb, achieving packaging 10 according to the present invention.
  • sealing 13 operation is carried out on the same inner polyethylene layer of the film, whereby sealing 13 is perfectly homogeneous and airtightness can be guaranteed.
  • sealings 14, 15 are carried out in succession (shown on fig. 2) as well as the necessary film cutting operations that follow when the packaging has been fully completed according to the invention.
  • side sealing operations 14, 15 are also carried out by coupling the inner polyethylene portions of film 11.
  • a suitable coupling means 16 like an adhesive label is applied to the first longer limb 11' through which said first foldable limb 11' is engaged to packaging 10 (arrow A in figure 1) making it possible to close and open said packaging even when it has been opened for the first time, with an ensuing delamination of sealing 13, which makes packed product 12 accessible.
  • Fig. 2 shows how the first sealing 13 is accomplished at a slightly lower level than the height of the second limb 11'' in such a way that during the opening phase, the user can employ the unsealed surfaces 11', 11'' as hand grip surfaces, for an easier and quicker opening operation of packaging 10.
  • Fig. 3 shows another form of embodiment 20 of the packaging according to the present invention.
  • Said packaging 20 results to be provided with a mechanical zipping closing system 21 made of plastic material.
  • packaging 20 is obtained by wrapping film 11 around the product 12 with a symmetrical fashion, and, once said first sealing 13 has been carried out, zip 21 is applied to packaging 20 by welding it to the film.
  • the film is further sealed 14, 15 and cut to obtain a packaging that can be opened and closed whenever wanted, all the same accomplishing a correct and effective preservation of the product therein contained.
  • Fig. 4 shows a schematical view of a packaging machine of the "flow-pack" type.
  • a single film is here unwrapped from a reel 50 and fed to a tubular forming device through which a series of products 12 lying on a conveyor with their small faces are made to advance.
  • a pair of rollers 55, 56 carry out a first longitudinal sealing 13 of the film limbs, while a device 60 provided a pair of welding blocks and cutting blades carries out the sealing and cutting operations of the transversal edges 14, 15 of the packaging.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Preparation And Processing Of Foods (AREA)
  • Packages (AREA)
  • Bag Frames (AREA)
  • Wrappers (AREA)
  • Containers And Plastic Fillers For Packaging (AREA)
  • Food Preservation Except Freezing, Refrigeration, And Drying (AREA)
  • Laminated Bodies (AREA)
  • Packging For Living Organisms, Food Or Medicinal Products That Are Sensitive To Environmental Conditiond (AREA)
EP99113038A 1998-10-23 1999-07-06 Beutel für Nahrungsmittel aus abziehbaren Folien und Verfahren zur Hestellung Expired - Lifetime EP0995695B1 (de)

Priority Applications (3)

Application Number Priority Date Filing Date Title
DE29923644U DE29923644U1 (de) 1998-10-23 1999-07-06 Verpackung für Nahrungsmittel aus einer abziehbaren Folie
CA 2288498 CA2288498C (en) 1998-10-23 1999-10-22 Pouch or packaging for foodstuffs made of a peelable film and process for the production thereof
US09/900,290 US6688078B2 (en) 1998-10-23 2001-07-06 Pouch or packaging for foodstuffs made of a peelable film and process for the production thereof

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT1998VR000092A IT1304213B1 (it) 1998-10-23 1998-10-23 Confezione in film pelabile per prodotti alimentari, e procedimentoper l'ottenimento della stessa.
ITVR980092 1998-10-23

Publications (2)

Publication Number Publication Date
EP0995695A1 true EP0995695A1 (de) 2000-04-26
EP0995695B1 EP0995695B1 (de) 2002-06-12

Family

ID=11428621

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99113038A Expired - Lifetime EP0995695B1 (de) 1998-10-23 1999-07-06 Beutel für Nahrungsmittel aus abziehbaren Folien und Verfahren zur Hestellung

Country Status (6)

Country Link
EP (1) EP0995695B1 (de)
AT (1) ATE219013T1 (de)
DE (1) DE69901771T2 (de)
DK (1) DK0995695T3 (de)
ES (1) ES2175880T3 (de)
IT (1) IT1304213B1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010129976A1 (de) * 2009-05-13 2010-11-18 Rupp Ag Folie zur verpackung eines gegenstandes
WO2022013402A1 (en) * 2020-07-16 2022-01-20 Société des Produits Nestlé S.A. Device and method for forming a soft container by heat-sealing

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008048781A1 (de) 2008-09-24 2010-03-25 Multivac Sepp Haggenmüller Gmbh & Co. Kg Verpackung aus Folie, Verfahren zum Herstellen der Verpackung sowie Verpackungsmaschine zur Durchführung des Verfahrens

Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4240241A (en) 1979-08-09 1980-12-23 W. R. Grace & Co. Method and apparatus for making a reclosable package
US4589145A (en) 1983-10-31 1986-05-13 Signode Corporation Packaging material and package
US4617683A (en) 1984-01-30 1986-10-14 Minigrip, Inc. Reclosable bag, material, and method of and means for making same
FR2637872A1 (fr) * 1988-10-14 1990-04-20 Reybier Fromageries Portion de fromage preemballee
US4969309A (en) 1989-01-27 1990-11-13 Kramer & Grebe Canada, Ltd. Method and apparatus for producing resealable packages
EP0513550A2 (de) 1991-04-19 1992-11-19 T.W. Kutter, Inc. Wiederverschliessbare Verpackungen sowie Verfahren und Vorrichtung zu ihrer Herstellung
EP0516393A1 (de) 1991-05-31 1992-12-02 Kraft Foods, Inc. Wiederverschliessbarer Beutel und Verfahren und Vorrichtung zur Herstellung, zum Füllen und zum Versiegeln desselben
EP0608123A1 (de) 1993-01-19 1994-07-27 Kraft Foods, Inc. Leicht zu öffnender und zu schliessender Beutel sowie Verfahren und Einrichtung für dessen Herstellung
US5351464A (en) * 1991-12-04 1994-10-04 Cavanna S.P.A. Packaging machine, particularly for forming flow-pack wrappers and the like and a method of operating the machine
US5400568A (en) * 1988-04-07 1995-03-28 Idemitsu Petrochemical Co., Ltd. Method and apparatus for making and filling a bag
EP0696991A1 (de) 1993-05-05 1996-02-21 Danisco Flexible Raackmann A S Beutel aus flexiblem verpackungsmaterial und verfahren zu dessen herstellung
EP0834454A1 (de) * 1997-06-03 1998-04-08 Seisan Nippon Sha, Ltd. Beutel mit Verschluss aus Kunststoff und Verfahren zu dessen Herstellung

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3720809A1 (de) * 1986-08-13 1988-02-18 M & W Mildenberger U Willing G Aufreissbare einzelverpackung fuer einen hygieneartikel

Patent Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4240241A (en) 1979-08-09 1980-12-23 W. R. Grace & Co. Method and apparatus for making a reclosable package
US4589145A (en) 1983-10-31 1986-05-13 Signode Corporation Packaging material and package
US4617683A (en) 1984-01-30 1986-10-14 Minigrip, Inc. Reclosable bag, material, and method of and means for making same
US5400568A (en) * 1988-04-07 1995-03-28 Idemitsu Petrochemical Co., Ltd. Method and apparatus for making and filling a bag
FR2637872A1 (fr) * 1988-10-14 1990-04-20 Reybier Fromageries Portion de fromage preemballee
US4969309A (en) 1989-01-27 1990-11-13 Kramer & Grebe Canada, Ltd. Method and apparatus for producing resealable packages
EP0513550A2 (de) 1991-04-19 1992-11-19 T.W. Kutter, Inc. Wiederverschliessbare Verpackungen sowie Verfahren und Vorrichtung zu ihrer Herstellung
EP0516393A1 (de) 1991-05-31 1992-12-02 Kraft Foods, Inc. Wiederverschliessbarer Beutel und Verfahren und Vorrichtung zur Herstellung, zum Füllen und zum Versiegeln desselben
US5351464A (en) * 1991-12-04 1994-10-04 Cavanna S.P.A. Packaging machine, particularly for forming flow-pack wrappers and the like and a method of operating the machine
EP0608123A1 (de) 1993-01-19 1994-07-27 Kraft Foods, Inc. Leicht zu öffnender und zu schliessender Beutel sowie Verfahren und Einrichtung für dessen Herstellung
EP0696991A1 (de) 1993-05-05 1996-02-21 Danisco Flexible Raackmann A S Beutel aus flexiblem verpackungsmaterial und verfahren zu dessen herstellung
EP0834454A1 (de) * 1997-06-03 1998-04-08 Seisan Nippon Sha, Ltd. Beutel mit Verschluss aus Kunststoff und Verfahren zu dessen Herstellung

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010129976A1 (de) * 2009-05-13 2010-11-18 Rupp Ag Folie zur verpackung eines gegenstandes
WO2022013402A1 (en) * 2020-07-16 2022-01-20 Société des Produits Nestlé S.A. Device and method for forming a soft container by heat-sealing

Also Published As

Publication number Publication date
ES2175880T3 (es) 2002-11-16
IT1304213B1 (it) 2001-03-13
DK0995695T3 (da) 2002-07-29
DE69901771D1 (de) 2002-07-18
DE69901771T2 (de) 2003-01-09
ATE219013T1 (de) 2002-06-15
EP0995695B1 (de) 2002-06-12
ITVR980092A1 (it) 2000-04-23

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