EP0376793B1 - Procédé pour faciliter l'ouverture d'un emballage à film de matière plastique, emballage obtenu à l'aide de ce procédé et machine pour sa mise en oeuvre - Google Patents
Procédé pour faciliter l'ouverture d'un emballage à film de matière plastique, emballage obtenu à l'aide de ce procédé et machine pour sa mise en oeuvre Download PDFInfo
- Publication number
- EP0376793B1 EP0376793B1 EP89403520A EP89403520A EP0376793B1 EP 0376793 B1 EP0376793 B1 EP 0376793B1 EP 89403520 A EP89403520 A EP 89403520A EP 89403520 A EP89403520 A EP 89403520A EP 0376793 B1 EP0376793 B1 EP 0376793B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- film
- stitching
- packing
- line
- wrapping
- 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
Links
Images
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
- B65D71/00—Bundles of articles held together by packaging elements for convenience of storage or transport, e.g. portable segregating carrier for plural receptacles such as beer cans or pop bottles; Bales of material
- B65D71/06—Packaging elements holding or encircling completely or almost completely the bundle of articles, e.g. wrappers
- B65D71/08—Wrappers shrunk by heat or under tension, e.g. stretch films or films tensioned by compressed articles
-
- 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
- B65D75/52—Details
- B65D75/58—Opening or contents-removing devices added or incorporated during package manufacture
- B65D75/66—Inserted or applied tearing-strings or like flexible elements
-
- 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
- B65D2571/00—Bundles of articles held together by packaging elements for convenience of storage or transport, e.g. portable segregating carrier for plural receptacles such as beer cans, pop bottles; Bales of material
- B65D2571/00006—Palletisable loads, i.e. loads intended to be transported by means of a fork-lift truck
- B65D2571/00012—Bundles surrounded by a film
- B65D2571/00018—Bundles surrounded by a film under tension
- B65D2571/00024—Mechanical characteristics of the shrink film
Definitions
- the subject of the invention is a method for facilitating the opening of a packaging with a plastic film, the packages or overpacks obtained using this method and a machine for its implementation.
- the problem therefore arises of providing, for packaging or overwrapping with a plastic film implemented by heat shrinking or cold shrinking, a means making it possible to facilitate opening while using, for the manufacture of the packaging or overwrapping, usual wrapping machines.
- an object of the invention to provide a method making it possible to facilitate the opening of plastic film packaging or overpacks, in particular those placed on one or more objects packed by heat shrink or cold shrink.
- an object of the invention to provide a packaging or overwrapping with plastic film easy to open, in particular such packaging or overpack obtained by heat shrinking or cold shrinking of the film wrapping the object or objects packed.
- an object of the invention to provide a machine allowing the simple and safe manufacture of such packages or overpacks.
- Such a sewing operation weakens the plastic film by the succession of needle holes, on the one hand, and associates with the film at least one thread causing it to tear when one pulls on a primer which it presents to a of its ends protruding from the film.
- the primer is provided with a means which facilitates gripping, such as a ring or the like.
- the seam (s) is (are) formed from one longitudinal edge to the other of the packaging film.
- the seam (s) is (are) formed (s) over only part of the width of the film.
- the seam (s) is (are) formed in the longitudinal direction of the packaging film.
- the thread (s) is (are) sewn (s) using a sewing head on the packaging film unwinding from a spool and before placing the film on the object (s) to be packaged, therefore, before the heat-shrinking operation.
- the seam (s) advantageously takes place before the film passes over the compensating rollers of the wrapping machine, that is to say in an area where the unwinding speed of the film is not constant, so that the invention provides for measuring this speed and taking it into account for the execution of the seam (s).
- the seam (s) takes place downstream of the compensating rollers, in the direction of travel of the strip, advantageously between said rollers and the film cutting members. in sections intended to form the packages or overpacks by heat-shrinking said sections.
- the invention also provides that the film of the plastic strip is pre-printed and that the seam (s) intended (s) to facilitate the opening of the packaging or overpack made from said film being executed in a predetermined location relative to a line or printing mark.
- the seam (s) is (are) executed (s) by keeping the thread coming from a spool momentarily stationary and by making a seam head move on the film during of the latter's temporary stop.
- a plastic film packaging or overpack in which are incorporated means allowing its opening to be facilitated, constituted by at least one zone of greater fragility than the rest of the film formed by perforations with which a wire is associated, is characterized according to the invention by the fact that the wire is placed in a zone distinct from that for closing said package or overpack and where the film prevails over a thickness only, that is to say without covering itself, and this by a seam made on said film using said one or more threads.
- the thread (s) form (s) a primer allowing their grip to, by traction, tear the film along the seam (s) and thus cause the opening of the packaging or overwrapping.
- the primer can be constituted simply by the free end of the wire (s) or, as a variant, comprise a gripping means such as a ring or the like fixed to said free end.
- the seam prevails only over part of the width of the film.
- the film has several seams directed along the longitudinal direction of the film to allow the packaging or overwrapping to be divided into a plurality distinct subsets of a more limited number of objects.
- seam (s) is (are) advantageously rectilinear, but the invention is not, of course, limited to such an embodiment.
- the plastic film is advantageously a heat-shrinkable film such as polyethylene with a thickness of between 20 and 300 ⁇ .
- the plastic film is a cold shrinkable or stretchable film such as polyethylene with a thickness of between 20 and 300 ⁇ .
- the invention also relates to a machine intended to the implementation of the method as defined above. Such a machine as defined in claim 17.
- the sewing head is arranged upstream of the compensating rollers of the shrinkwrapper, in the direction of travel of the film from the reel towards the heat-shrinking means.
- the invention then provides, in this embodiment, to associate with the sewing head means of measurement of the speed of the film, and of means for controlling the movement of the sewing head, from a marking signal, so that said seam has the desired shape, for example extends substantially perpendicular to the longitudinal edges of the film .
- the sewing head is placed downstream of the compensating rollers, in the direction of travel of the film in the wrapping machine.
- the sewing head is then associated, in this embodiment, only with means for detecting a possible marking signal, for example under form of an inscription carried by the film, and a device for controlling the movement of said head as a function of the advance of the film in order to obtain the desired line drawing (s).
- compensating rollers are applied to keep the film temporarily stopped and then move on said film then stopped a sewing head with which are further associated organs such as knives for cutting the sewing thread (s) on one of the edges of the film while retaining a primer on the other edge of the film.
- the film F is provided, before being placed on the group of bottles B, with one or more thread (s) sewn on it along a line of predetermined shape or, where appropriate, along several lines with a short length of thread (s) protruding from the film at one end of the seam line (s).
- the film F After heat-shrinking the film F, it covers the bottles B which it encloses, as shown in FIG. 1 and the appearance of the overpack is very close to that of the usual overpacks, provided that the latter presents the seam line (s) and the thread (s) previously sewn (s) on the film, for example on one of its faces, that is to say in a zone distinct from that where the film is welded to its closure.
- the invention also allows, if desired, to easily split the overpack in a plurality of separate packages, for example by providing one or more seam lines directed obliquely to the line 12, for example as shown in the figure 1 by the dashed lines f1 and f2.
- the invention provides for associating with a conventional wrapping machine means allowing the production of the seam (s) on the plastic film.
- a conventional wrapping machine means allowing the production of the seam (s) on the plastic film.
- the film F coming from a reel 20 flows in the direction of arrow A while being guided by support members like 21 up to a set 22 of compensating rollers 23 for adjusting the tension and the speed of advance of the film, which is driven by a wheeled device 24.
- a knife 25 cuts the film along sections T conveyed on a device conveyor belt 26 by rollers 27 to a table 28 on which are brought the groups of bottles B which, wrapped in the sections of film T by means known per se, are then directed to a tunnel where the section of film T is heat shrunk on the bottles to form the desired packaging or overpack E.
- FIGS. 4 and 5 the sewing head 30 of a machine according to the invention is arranged upstream of the compensating rollers, 22, 23, in the direction of travel of the film F from the reel 20.
- said sewing head is mounted to move on an arm 31 inclined in the direction of the median axis x of the film, forming with the latter an angle ⁇ which can be adjusted by pivoting the arm 31 around an axis of articulation 32 at one of its ends and by adjusting the position of the other end 33 relative to a fixed point 34 perpendicular to the axis 32.
- a sensor 40 which can be made sensitive, for example, to an inscription carried by the film, of the genre "pull to open here" or a line of contrasting color, or any other similar indication.
- the sewing thread (s) is (are) executed (s) in areas of the film which are not those intended for closure during the heat-shrinking operation of on the one hand, and on a single film thickness, on the other hand; the wire (s) advantageously protrude from the film F to form a primer to which can be attached, if necessary, a ring or other gripping member 16.
- the sewing head 30 ′ is provided downstream of the compensating rollers 22, 23, in the direction of travel of the film F.
- the head 30 ′ is also mounted to move on an arm 31 ′ pivotally articulated at one of its ends 32 ′, the other end 33 ′ being of position adjustable according to a value h relative to a horizontal line passing through point 32 ′.
- it eliminates the presence of a sensor like the sensor 35 of the previous embodiment, since the speed of the film is substantially constant up to the cutting device 25, the operation being for the rest identical to that described above.
- the sewing head 30a is provided between a first set of compensating rollers 22a, 23a, and a second set of compensating rollers 22b and 23b, which make it possible to define for the film F from a reel 20 a zone 50 where the film is flat on the one hand and where it can be immobilized, temporarily, between two jaws 51 and 52, on the other hand.
- the sewing head 30a the needle of which is shown diagrammatically at 53, has a U-shaped cross section, overlapping the film F by a first arm 54 somewhat similar to the crowbar of conventional sewing machines and a second arm 55 parallel to the first. and placed under the film F.
- the sewing head 30a is provided to move perpendicular to the film F momentarily stopped in the area 50, as shown by the arrow k , from an edge to the other from the film.
- the head 30a then moves being guided by a rail, not shown, parallel to the longitudinal direction of the film, that is to say in the direction of the arrow l , while the part of sewn film is released from under the sewing head.
- the head is moved in the opposite direction to that shown by arrow k until it reaches the other edge of the film.
- the head 30a then moves parallel to the film, in the direction opposite to that shown by the arrow l until it takes the initial position; during this movement, the second section of film which has been sewn is also released, a new section of film is brought in, and the process can start again by moving the sewing head along the path shown in phantom in the figure 8.
- the invention is not, however, and of course, limited to the embodiments described above. It includes in particular embodiments with several seam lines, and with seam lines of different shapes.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Packages (AREA)
- Wrappers (AREA)
- Containers And Plastic Fillers For Packaging (AREA)
- Auxiliary Devices For And Details Of Packaging Control (AREA)
- Making Paper Articles (AREA)
- Supplying Of Containers To The Packaging Station (AREA)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT89403520T ATE77997T1 (de) | 1988-12-27 | 1989-12-18 | Verfahren und vorrichtung zum herstellen einer leicht zu oeffnenden kunststoffolien-verpackung sowie so hergestellte verpackung. |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR8817211A FR2640951B1 (zh) | 1988-12-27 | 1988-12-27 | |
FR8817211 | 1988-12-27 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0376793A1 EP0376793A1 (fr) | 1990-07-04 |
EP0376793B1 true EP0376793B1 (fr) | 1992-07-08 |
Family
ID=9373442
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP89403520A Expired - Lifetime EP0376793B1 (fr) | 1988-12-27 | 1989-12-18 | Procédé pour faciliter l'ouverture d'un emballage à film de matière plastique, emballage obtenu à l'aide de ce procédé et machine pour sa mise en oeuvre |
Country Status (10)
Country | Link |
---|---|
EP (1) | EP0376793B1 (zh) |
JP (1) | JPH04504398A (zh) |
KR (1) | KR910700182A (zh) |
AT (1) | ATE77997T1 (zh) |
AU (1) | AU4804490A (zh) |
CA (1) | CA2006574A1 (zh) |
DE (1) | DE68902046T2 (zh) |
DK (1) | DK119091A (zh) |
FR (1) | FR2640951B1 (zh) |
WO (1) | WO1990007460A1 (zh) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2666568B1 (fr) * | 1990-09-10 | 1994-05-27 | Kaysersberg Sa | Ensemble de produits finis empiles sur une palette et procede pour realiser un tel ensemble. |
DE9201916U1 (de) * | 1992-02-14 | 1992-04-09 | Windmöller & Hölscher KG, 49525 Lengerich | Schrumpffolienverpackung |
IT230406Y1 (it) * | 1993-09-16 | 1999-06-07 | Cristofani Alessandro | Imballo multiplo per bottiglie perfezionato |
EP1321379B1 (en) * | 2001-12-20 | 2009-05-27 | Alessandro Cristofani | Heat-shrinkable film packaging for bottles and process for manufacturing said packaging |
EP1666376A1 (en) * | 2004-12-03 | 2006-06-07 | Philip Morris Products S.A. | Easy opening of film wrapper |
ITBO20060214A1 (it) † | 2006-03-29 | 2006-06-28 | Gd Spa | Metodo per la produzione di materiale da sovraincarto e confezione dotata del materiale cosi' prodotto. |
FR2964647B1 (fr) | 2010-09-14 | 2013-12-27 | Extrusion Du Polyethylene A Barbier & Cie Soc D | Film plastique pour recouvrir et contenir des lots de produits et permettre leur ouverture ou leur separation en sous-lots pour en faciliter leur deballage |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3137604A1 (de) * | 1981-09-22 | 1983-04-14 | N.V. Master Foods S.A., 2430 Olen | Kochbeutel |
US4586312A (en) * | 1984-04-02 | 1986-05-06 | Pet Incorporated | Method for producing heat shrinkable package with a frangible access panel |
US4567987A (en) * | 1984-08-27 | 1986-02-04 | Champion International Corporation | Easy opening pinch bottom bag |
JPS6228354A (ja) * | 1985-07-19 | 1987-02-06 | 本州製紙株式会社 | 易開封性シユリンク包装体ならびにその製造法 |
-
1988
- 1988-12-27 FR FR8817211A patent/FR2640951B1/fr not_active Expired - Fee Related
-
1989
- 1989-12-18 DE DE8989403520T patent/DE68902046T2/de not_active Expired - Fee Related
- 1989-12-18 WO PCT/FR1989/000659 patent/WO1990007460A1/fr unknown
- 1989-12-18 AU AU48044/90A patent/AU4804490A/en not_active Abandoned
- 1989-12-18 JP JP2501086A patent/JPH04504398A/ja active Pending
- 1989-12-18 KR KR1019900701814A patent/KR910700182A/ko not_active Application Discontinuation
- 1989-12-18 AT AT89403520T patent/ATE77997T1/de active
- 1989-12-18 EP EP89403520A patent/EP0376793B1/fr not_active Expired - Lifetime
- 1989-12-22 CA CA002006574A patent/CA2006574A1/fr not_active Abandoned
-
1991
- 1991-06-19 DK DK119091A patent/DK119091A/da not_active Application Discontinuation
Also Published As
Publication number | Publication date |
---|---|
KR910700182A (ko) | 1991-03-14 |
WO1990007460A1 (fr) | 1990-07-12 |
DK119091D0 (da) | 1991-06-19 |
ATE77997T1 (de) | 1992-07-15 |
FR2640951B1 (zh) | 1991-08-16 |
EP0376793A1 (fr) | 1990-07-04 |
CA2006574A1 (fr) | 1990-06-27 |
DE68902046T2 (de) | 1993-01-07 |
JPH04504398A (ja) | 1992-08-06 |
AU4804490A (en) | 1990-08-01 |
DK119091A (da) | 1991-06-19 |
FR2640951A1 (zh) | 1990-06-29 |
DE68902046D1 (de) | 1992-08-13 |
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