WO1997048607A1 - Verfahren zur herstellung von öffnungsmitteln für eine verpackung - Google Patents
Verfahren zur herstellung von öffnungsmitteln für eine verpackung Download PDFInfo
- Publication number
- WO1997048607A1 WO1997048607A1 PCT/DE1997/001293 DE9701293W WO9748607A1 WO 1997048607 A1 WO1997048607 A1 WO 1997048607A1 DE 9701293 W DE9701293 W DE 9701293W WO 9748607 A1 WO9748607 A1 WO 9748607A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- cuts
- width
- plastic film
- polyamide
- packaging
- Prior art date
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
- B65B61/182—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 tear-strips or tear-tapes
Definitions
- the invention relates to a method for producing a packaging which essentially consists of plastic film, with means for opening the packaging without the aid of tools, and to a packaging which can be produced thereafter.
- Packaging that can be opened without the aid of tools such as knives, can openers etc., i.e. So-called easy-open systems have become increasingly important in recent years due to the significant simplification of handling by the consumer.
- tear strips are known which are either incorporated into the film material or are subsequently attached to the fully filled packaging by welding with simultaneous embossing.
- the object of the present invention is to overcome the disadvantages of the known prior art and to provide a method with which an easy-open concept can be reliably implemented in a packaging made of plastic film.
- this object is achieved in that the plastic film is fed from the roll to a cutting station in which the size of the final sealing pack adapted clock cuts are made, the width of which is less than the width of the plastic film and cut through the thickness completely; that in the area of the cuts, these completely covering covering strips are applied in a sealing but removable manner; and that the plastic film prepared in this way is then further processed in a manner known per se for the final packaging.
- the width of the cuts is 1/4 to 3/4, more preferably 1/3 to 1/2, most preferably approximately 1/3 of the width of the plastic film.
- the cuts are made by a number of partial cuts separated by webs.
- the width of the partial cuts and / or the webs can be the same at different points in the cuts or, in the second alternative, different.
- the invention further provides that a first sequence of partial cuts of constant width comprising a number n of partial cuts is applied alternately with a second sequence of partial cuts of constant width comprising a number m of partial cuts, the width of the partial cuts belonging to the first sequence being of width the partial cuts belonging to the second sequence is different.
- n 1 and m is 1.
- n 1 and m is 2.
- a laminate with the following sequence of layers is preferably used as the plastic film: polypropylene, single or multi-layer polyamide, polypropylene, the polyamide layer preferably being either a co-extruded polyamide or consisting of at least two polyamide layers, the one layer consisting of a polyamide with high barrier properties, while the other layer consists of a polyamide with high shrinkage capacity.
- a laminate is preferably used as the material for the cover strip, the inner layer of which is arranged above the cuts in the plastic film and consists of an adhesive, peelable plastic, preferably a copolymer of polyethylene and polypropylene.
- the method of the present invention realizes several advantages which - at least in this combination - have not hitherto been achieved in methods according to the prior art.
- a packaging produced by the method according to the invention is particularly easy to open by pulling off the cover strip over the cut and breaking the packaging by deforming it in the area of the cut, and the contents can be removed.
- the advantages described are particularly evident when the filled packaging is subjected to a sterilization process.
- the system described is easily able to withstand the temperatures and internal pressures in such a process, and on the other hand, the packaging material is subject to shrinkage in the case of such a heat treatment, which causes the breakdown of the Packaging is further facilitated by deformation after pulling off the cover strip over the cut.
- the advantages described for packaging that are subjected to a sterilization process cannot be achieved with known easy-open systems.
- the use of the preferred materials, both for the plastic film and for the cover strip, has further advantages.
- the particularly preferred laminate plastic film offers sufficient stability that there is no stretching and no further tearing of the cut due to the pulling off the roll.
- the cover strip under the influence of heat, not only is the cut reliably sealed, but also the upper layer of the laminate plastic is melted and forms an additional seal of the cut in a partial area, so that the product is torn off when the cover strip is torn off not directly exposed, but can be easily exposed by slightly deforming the packaging.
- each of the cuts made in a stroke adapted to the size of the final packaging is made by a number of partial cuts separated by webs an increased mechanical stability of the packaging that can be produced by the method is achieved.
- This increased mechanical stability also manifests itself in the pull-off behavior during film transport in the packaging machine in such a way that thinner films can be used.
- the risk of the film tearing further is reduced.
- the quality of the sealed seam increases due to the higher strength.
- the heating energy requirement, which is necessary when the cover strip is sealed, is reduced.
- Another procedural advantage is that by making the cut through a number of partial cuts separated by webs, the supply of the heating energy required for sealing is simplified from the side opposite the tear strip.
- the packaging which can be produced by the method according to the invention has a higher mechanical stability compared to transport stress, which not only leads to a reduction in the product losses caused by transport damage, but also, particularly if the products are perishable, reduce the risk of microbial spoilage device.
- the width of the partial cut delimited by two webs is greater or less than or equal to the width of a web.
- FIG. 1 shows a device for carrying out the method according to the invention and the process sequence
- FIG. 2 shows the structure of a special embodiment of the packaging according to the invention in cross-section in the area of the covered cut.
- FIGs. 3 to 7 show different embodiments of the cut made by a number of web sections, the width of which is less than the width of the plastic film and which completely cuts through the plastic film.
- the plastic film 10 to be used for the packaging is fed from a supply roll over the rollers (not shown) which serve to smooth out the film run to a cutting station 20.
- a cut 11 is made by means of a cutting tool 25.
- the cut 11 is made centrally in the film 10, the width of the cut 11 being chosen such that - depending on the plastic material used - The further removal of the film prevents stretching or tearing of the cut. It is essential that the cut 11 not only weakens the plastic material, but also cuts it completely.
- a supply roll 32 is fed to a cutting station 34, in which cover strips 15 are produced in the desired width, for example 6 to 12 mm. These cover strips are fixed by a vacuum on a stamp 35 of a sealing device 36. Then the sealing device 36 is rotated by 180 ° and the with Vacuum-fixed cover strips 15 are sealed onto the next cut 11 supplied in the plastic film 10 at a temperature of approx. 210 ° C. in such a way that the cut is covered in a completely sealing manner.
- the packaging is fed to a hose forming and filling station (not shown) known per se, in which e.g. a sausage-like product is produced.
- the preferred material according to the invention consists of two layers of polypropylene 12, 12 ', between which a single or multi-layer polyamide layer 13 is arranged, the polyamide layer being a coextruded polyamide or two polyamide layers 13', 13 '' can consist of what the upper, ie the layer 13 'facing the outer polypropylene layer 12 consists of a polyamide with high barrier properties, while the lower, i.e. the layer 13 '' facing the inner polypropylene layer 12 'consists of a polyamide with high shrinkage properties.
- Such a construction of the plastic material makes it possible to provide a packaging material which, on the one hand, has excellent barrier properties against oxygen and water vapor and, moreover, can be optimally printed on the polyamide layer.
- a cover strip 15 which completely covers the width and length and which is preferably also constructed as a laminate. It should be ensured that the layer 16 of the laminate facing the cut has the necessary adhesive properties, ie can be fixed firmly over the cut, but at the same time is optimally peelable, ie peelable i st.
- a copolymer of polyethylene and polypropylene has proven to be particularly preferred.
- the layers 17, 18 arranged above are less critical in their composition. In the exemplary embodiment shown, this can be a PET layer 17 and a final polypropylene layer 18, although other materials are also conceivable.
- FIG. 3 shows a section consisting of a sequence of partial sections 11b of constant width separated by webs 11a of constant width, the width of the partial sections being a multiple of the width of the webs separating the partial sections.
- FIG. 4 shows a sectional design in which the width of the partial cuts 11b approximately corresponds to the width of the webs 11a arranged between the partial cuts.
- FIG. 5 shows an embodiment of the cut design, in which the width of the webs 11a arranged between the partial cuts 11b is smaller than the width of the partial cuts, the partial cuts consisting of an alternating sequence of partial cuts, again the The width of a partial cut is larger or smaller than that of the following partial cut.
- FIG. 6 shows an embodiment of the cut design in which a sequence 11c consisting of two partial cuts is alternately applied with a sequence 11d from a partial cut.
- the partial sections included in the first sequence have the same width as one another, but are shorter than the width of the partial section included in the second sequence.
- the width of the webs arranged between the different sequences is approximately constant over the entire cutting width.
- the width of the webs arranged between the partial sections of the first sequence can be approximately equal to the width of the webs arranged between the partial sections of the second sequence.
- FIG. 4 a sectional design is shown which is similar to that in FIG. 4 is the cut embodiment shown, but both the width of the webs and that of the partial cuts are substantially reduced, so that a perforation line is formed in the present case.
- the method according to the invention is particularly suitable for the production of cylindrical packaging in the form of a sausage, which can either be sausage products for the food sector or sausage-presented animal food products such as a so-called dog sausage, in the latter case the filling being made from a moist to semi-moist chunky dog food can exist.
- a sausage which can either be sausage products for the food sector or sausage-presented animal food products such as a so-called dog sausage, in the latter case the filling being made from a moist to semi-moist chunky dog food can exist.
- Other forms of application are conceivable, since the method according to the invention provides an easy-open concept which offers advantages in many types of packaging.
- the features of the invention disclosed in the above description, in the drawing and in the claims can be essential both individually and in any combination for realizing the invention in its various embodiments.
Abstract
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DK97932703T DK0912400T3 (da) | 1996-06-17 | 1997-06-17 | Fremgangsmåde til fremstilling af åbningsmidler for en emballage |
AU36186/97A AU715834B2 (en) | 1996-06-17 | 1997-06-17 | Process for manufacture of a pack and pack manufacturable therewith |
EP97932703A EP0912400B2 (de) | 1996-06-17 | 1997-06-17 | Verfahren zur herstellung von öffnungsmitteln für eine verpackung |
DE59706253T DE59706253D1 (de) | 1996-06-17 | 1997-06-17 | Verfahren zur herstellung von öffnungsmitteln für eine verpackung |
NO985859A NO985859L (no) | 1996-06-17 | 1998-12-14 | FremgangsmÕte for fremstilling av Õpningsmidler for en forpakning |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE1996124042 DE19624042C2 (de) | 1996-06-17 | 1996-06-17 | Verfahren zur Herstellung einer Verpackung sowie danach herstellbare Verpackung |
DE19624042.5 | 1996-06-17 | ||
DE19634759A DE19634759C2 (de) | 1996-06-17 | 1996-08-28 | Verfahren zur Herstellung einer Verpackung sowie danach herstellbare Verpackung |
DE19634759.9 | 1996-08-28 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1997048607A1 true WO1997048607A1 (de) | 1997-12-24 |
Family
ID=26026633
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/DE1997/001293 WO1997048607A1 (de) | 1996-06-17 | 1997-06-17 | Verfahren zur herstellung von öffnungsmitteln für eine verpackung |
Country Status (8)
Country | Link |
---|---|
EP (1) | EP0912400B2 (de) |
AU (1) | AU715834B2 (de) |
CA (1) | CA2258645A1 (de) |
DE (2) | DE19634759C2 (de) |
DK (1) | DK0912400T3 (de) |
NO (1) | NO985859L (de) |
NZ (1) | NZ333794A (de) |
WO (1) | WO1997048607A1 (de) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1110878A1 (de) * | 1997-06-03 | 2001-06-27 | Kabushiki Kaisha Hoseki Planning | Mit Abdeckstreifen verschlossener Schlauchbeutel und Verfahren zu seiner Herstellung |
EP1627822A2 (de) * | 2004-08-16 | 2006-02-22 | Sealstrip Corporation | Leicht zu öffnende Verpackungen |
WO2010063890A1 (en) * | 2008-12-05 | 2010-06-10 | Lamican Oy | A method and an apparatus for placing a sealing strip |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2005105582A1 (de) | 2004-04-30 | 2005-11-10 | Robert Bosch Gmbh | Verpackungsmaschine zur herstellung von schlauchbeuteln und schlauchbeutel |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH427637A (de) * | 1963-02-25 | 1966-12-31 | Milliken Tetra Pak A Division | Mit Flüssigkeit gefüllter, dichtverschlossener Tetraederbehälter |
EP0668150A1 (de) * | 1994-02-18 | 1995-08-23 | Tetra Laval Holdings & Finance SA | Verfahren und Vorrichtung zum Überführen von Laschen an eine laufende Materialbahn |
EP0752375A1 (de) * | 1995-07-05 | 1997-01-08 | Techmay S.A. | Leicht zu öffnende Vorrichtung für eine Verpackung aus zerreissbarer Folie sowie Verfahren und Maschine zum Ausstatten einer Verpackung mit dieser Vorrichtung |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SE329968B (de) * | 1964-01-16 | 1970-10-26 | Tetra Pak Int | |
US4840270A (en) * | 1987-12-21 | 1989-06-20 | Nice-Pak Products, Inc. | Re-sealable label flap |
DE3828355A1 (de) * | 1988-08-20 | 1990-02-22 | Hoechst Ag | Mehrschichtige verpackungsfolie mit gasbarriere |
DE4041743A1 (de) * | 1990-12-24 | 1992-06-25 | Schickedanz Ver Papierwerk | Kontinuierliches verfahren zum herstellen wiederverschliessbarer folienverpackungen |
DE4238127A1 (de) † | 1992-11-12 | 1994-05-19 | Wolff Walsrode Ag | Mehrschichtige coextrudierte, schrumpffähige verstreckte Schlauchfolie |
-
1996
- 1996-08-28 DE DE19634759A patent/DE19634759C2/de not_active Expired - Fee Related
-
1997
- 1997-06-17 AU AU36186/97A patent/AU715834B2/en not_active Ceased
- 1997-06-17 DK DK97932703T patent/DK0912400T3/da active
- 1997-06-17 CA CA002258645A patent/CA2258645A1/en not_active Abandoned
- 1997-06-17 DE DE59706253T patent/DE59706253D1/de not_active Expired - Fee Related
- 1997-06-17 WO PCT/DE1997/001293 patent/WO1997048607A1/de active IP Right Grant
- 1997-06-17 NZ NZ333794A patent/NZ333794A/xx unknown
- 1997-06-17 EP EP97932703A patent/EP0912400B2/de not_active Expired - Lifetime
-
1998
- 1998-12-14 NO NO985859A patent/NO985859L/no not_active Application Discontinuation
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH427637A (de) * | 1963-02-25 | 1966-12-31 | Milliken Tetra Pak A Division | Mit Flüssigkeit gefüllter, dichtverschlossener Tetraederbehälter |
EP0668150A1 (de) * | 1994-02-18 | 1995-08-23 | Tetra Laval Holdings & Finance SA | Verfahren und Vorrichtung zum Überführen von Laschen an eine laufende Materialbahn |
EP0752375A1 (de) * | 1995-07-05 | 1997-01-08 | Techmay S.A. | Leicht zu öffnende Vorrichtung für eine Verpackung aus zerreissbarer Folie sowie Verfahren und Maschine zum Ausstatten einer Verpackung mit dieser Vorrichtung |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1110878A1 (de) * | 1997-06-03 | 2001-06-27 | Kabushiki Kaisha Hoseki Planning | Mit Abdeckstreifen verschlossener Schlauchbeutel und Verfahren zu seiner Herstellung |
EP1627822A2 (de) * | 2004-08-16 | 2006-02-22 | Sealstrip Corporation | Leicht zu öffnende Verpackungen |
EP1627822A3 (de) * | 2004-08-16 | 2008-05-21 | Sealstrip Corporation | Leicht zu öffnende Verpackungen |
WO2010063890A1 (en) * | 2008-12-05 | 2010-06-10 | Lamican Oy | A method and an apparatus for placing a sealing strip |
Also Published As
Publication number | Publication date |
---|---|
NZ333794A (en) | 2000-08-25 |
EP0912400B2 (de) | 2005-08-03 |
AU3618697A (en) | 1998-01-07 |
AU715834B2 (en) | 2000-02-10 |
NO985859D0 (no) | 1998-12-14 |
NO985859L (no) | 1998-12-14 |
DE59706253D1 (de) | 2002-03-14 |
DK0912400T3 (da) | 2002-05-13 |
DE19634759A1 (de) | 1998-03-05 |
EP0912400A1 (de) | 1999-05-06 |
EP0912400B1 (de) | 2002-01-30 |
CA2258645A1 (en) | 1997-12-24 |
DE19634759C2 (de) | 2003-11-06 |
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