EP1270437A2 - Verpackungsfilm für Nahrungsmittel - Google Patents

Verpackungsfilm für Nahrungsmittel Download PDF

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Publication number
EP1270437A2
EP1270437A2 EP02007817A EP02007817A EP1270437A2 EP 1270437 A2 EP1270437 A2 EP 1270437A2 EP 02007817 A EP02007817 A EP 02007817A EP 02007817 A EP02007817 A EP 02007817A EP 1270437 A2 EP1270437 A2 EP 1270437A2
Authority
EP
European Patent Office
Prior art keywords
film
roll
cuts
ribbon
side edges
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
EP02007817A
Other languages
English (en)
French (fr)
Other versions
EP1270437B1 (de
EP1270437A3 (de
Inventor
Alberto Malaspina
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.)
Nuova Poliver Srl
Original Assignee
Nuova Poliver di Oddone Colomba and C SNC
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Nuova Poliver di Oddone Colomba and C SNC filed Critical Nuova Poliver di Oddone Colomba and C SNC
Publication of EP1270437A2 publication Critical patent/EP1270437A2/de
Publication of EP1270437A3 publication Critical patent/EP1270437A3/de
Application granted granted Critical
Publication of EP1270437B1 publication Critical patent/EP1270437B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • B65D65/00—Wrappers or flexible covers; Packaging materials of special type or form
    • B65D65/02—Wrappers or flexible covers
    • B65D65/22—Details
    • 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
    • B65D83/00—Containers or packages with special means for dispensing contents
    • B65D83/08—Containers or packages with special means for dispensing contents for dispensing thin flat articles in succession
    • B65D83/0805—Containers or packages with special means for dispensing contents for dispensing thin flat articles in succession through an aperture in a wall
    • B65D83/0811—Containers or packages with special means for dispensing contents for dispensing thin flat articles in succession through an aperture in a wall with means for assisting dispensing
    • B65D83/0841—Containers or packages with special means for dispensing contents for dispensing thin flat articles in succession through an aperture in a wall with means for assisting dispensing and for cutting interconnected articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H35/00—Delivering articles from cutting or line-perforating machines; Article or web delivery apparatus incorporating cutting or line-perforating devices, e.g. adhesive tape dispensers
    • B65H35/0006—Article or web delivery apparatus incorporating cutting or line-perforating devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2701/00—Handled material; Storage means
    • B65H2701/10—Handled articles or webs
    • B65H2701/17—Nature of material
    • B65H2701/175—Plastic
    • B65H2701/1752—Polymer film

Definitions

  • This invention relates to an improved film of synthetic material, particularly, though not exclusively, polyethylene or polypropylene, especially for packing foodstuff.
  • polyethylene films both in the home and in canteens, self-service restaurants, etc., for covering trays or food-containers in order to protect foodstuffs from outside contamination.
  • These films are generally transparent and are made adhesive on one or both their faces so that they will stick to the smooth surface of trays or containers and seal them.
  • the films are typically manufactured in the form of ribbons, so that they can be rolled up on a cylindrical cardboard core, and they are packed in cardboard boxes having a rectilinear slot, parallel to the axis of the roll, through which slot the film is pulled out.
  • a metal saw extending along the whole length of one of the edges parallel to the slot, is attached to the box in such a way that the cutting border slightly projects beyond the edge.
  • the user after pulling the desired amount of film out of the box, can then sever it by pressing it against the saw along the line of the desired cut, and by exerting a moderate pull.
  • Another disadvantage of the known film is that attaching a saw to the container box is a relatively complex and time-consuming operation, which increases the manufacturing costs, due both to the cost of the saw itself and to the cost of the additional manufacturing equipment.
  • a further disadvantage of this film is that the user may be hurt by the metal saw, which must be sharp enough to produce a tear as smooth as possible. Not only the operator's safety is jeopardized thereby, but also the sanitary conditions of the packing process.
  • a saw is shaped directly on one of the major walls of the cardboard box, i.e. on one of the edges parallel to the slot through which the film is pulled. Consequently, no metal saw needs to be fastened to the box, and the problem of the injuries to the user is partly solved.
  • the cardboard saw has an inherent lower efficiency than the metal saw, and the efficiency tends to decrease as the saw is used, because of the wear of the saw-teeth.
  • Film-holders are also commercially available, where a roll of film is rotationally supported, the film is extracted through a slot, and a slidable blade parallel to the slot can be operated to cut the film.
  • these film-holders are heavy, cumbersome and expensive, so that, while they may be acceptable for professional use, they are less suitable for home use.
  • the main object of the present invention is therefore to overcome the above disadvantages, by providing an improved film of synthetic material, which can be smoothly cut without requiring neither tools nor particular care by the user.
  • Another object of the invention is to provide an improved film which does not require any associated cutting devices, such that may be liable to harm the operator, cause delays in the packing process and jeopardize the sanitary conditions of the packing.
  • an object of the invention is to provide the above improved film so that it can be manufactured cheaply and easily.
  • a ribbon of polyethylene film 20 is wound on a supporting cylindrical cardboard core 14, to form a roll 10.
  • the lateral edges of the film ribbon are incised with short cuts 18 at right angles to the edges and at spaced intervals along the edges.
  • the cuts are about 1 mm deep and the intervals are less than 50 mm, preferably about 10 mm.
  • film 20 is manufactured so that the preferential direction of tear propagation is transverse to the length of the ribbon. This can be achieved by means of a technique usable when manufacturing the polyethylene film by the so-called blown-film technology.
  • blown-film is manufactured by extruding a tubular film through an annular die, by pulling the film upwards and inflating it to form a bubble, while cooling and calibrating the bubble.
  • a transverse orientation of macromolecules can be achieved, for instance, if the value of the Blow Up Ratio (BUR), i.e. the ratio of the bubble diameter to the die diameter, usually in the range 1.5 to 6, is chosen near the upper limit of the range.
  • BUR Blow Up Ratio
  • TUR Take-Up Ratio
  • Cuts 18 can be made by any suitable process, e.g. by making the individual cuts, one by one, along the ribbon as it is fed along the manufacturing line.
  • the cuts are all made in one stroke in the finished roll of film, by means of a cutting tool 26 comprising spider-arranged cutting blades 28 between a hub 30 and a peripheral wall 32.
  • Cutting tool 26 is arranged to hit the lateral surface of the roll of film 10 with an impact that will cause the sharp blades to penetrate the side surface of the roll for the desired small depth.
  • the roll of film of the invention is preferably packed in a cardboard box 12 having a rectilinear slot 24, parallel to the axis the roll, through which slot the film can be pulled out by the user.
  • box 12 carries a waxy strip 22 extending near one of its edges. The user, after pulling the desired amount of film 20 with one hand, presses the film down against the waxy strip and pulls downwards. The film will stick to the waxy strip and will offer a resistance to traction, so that a tear will start at the nearest cut 18. After the cut 18 has promoted the start of the tear, the tear will then propagate substantially along edge 16, which acts as a guide, because the preferential direction of tearing propagation is transverse to the roll.
  • the invention solves the stated problem, by providing an improved film which can be smoothly torn in a substantially transverse direction, without requiring particular care by the operator.
  • Another advantage of the invention is that it dispenses with any cutting devices, which may be dangerous for the user and may jeopardize the sanitary conditions of the foodstuff packing procedure.
  • a further advantage of the invention is that the cutting means are not liable to rapid wear and that their efficiency is substantially constant during the lifetime of the roll of film.
  • Another advantage of the invention is that the improved film, including the associated box and cuts, is cheap and easy to manufacture.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Details Of Rigid Or Semi-Rigid Containers (AREA)
  • Cartons (AREA)
  • Wrappers (AREA)
  • Packages (AREA)
  • Storage Of Web-Like Or Filamentary Materials (AREA)
  • Laminated Bodies (AREA)
EP02007817A 2001-06-29 2002-04-08 Verpackungsfilm für Nahrungsmittel Expired - Lifetime EP1270437B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITTO20100110U 2001-06-29
IT2001TO000110U ITTO20010110U1 (it) 2001-06-29 2001-06-29 Pellicola perfezionata di materiale sintetico, particolarmente per l'imballaggio di prodotti alimentari.

Publications (3)

Publication Number Publication Date
EP1270437A2 true EP1270437A2 (de) 2003-01-02
EP1270437A3 EP1270437A3 (de) 2004-02-04
EP1270437B1 EP1270437B1 (de) 2008-07-09

Family

ID=11458520

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02007817A Expired - Lifetime EP1270437B1 (de) 2001-06-29 2002-04-08 Verpackungsfilm für Nahrungsmittel

Country Status (7)

Country Link
US (1) US20030001034A1 (de)
EP (1) EP1270437B1 (de)
AT (1) ATE400511T1 (de)
CA (1) CA2385197A1 (de)
DE (1) DE60227457D1 (de)
ES (1) ES2309120T3 (de)
IT (1) ITTO20010110U1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2473046A (en) * 2009-08-28 2011-03-02 Personal Lifting Ltd A support element for a transfer trolley with a removable cover
WO2016186026A1 (ja) * 2015-05-15 2016-11-24 旭化成株式会社 フィルム収納容器、フィルム、フィルム巻回体及びフィルム収納体

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2303144A (en) * 1941-05-26 1942-11-24 Walter E Stephenson Tape
US2508855A (en) * 1947-04-26 1950-05-23 Clayton H Brown Adhesive tape with tearing facilities
US3503292A (en) * 1968-02-19 1970-03-31 Paper Novelty Mfg Co Sheet cutting device
JPS5422484Y2 (de) * 1975-05-23 1979-08-06
US5743398A (en) * 1984-05-22 1998-04-28 Southpac Trust International, Inc. Floral wrapper utilizing a breathable packaging material
FR2574051B1 (fr) * 1984-12-03 1990-01-19 Asahi Chemical Ind Emballage hermetique en matiere plastique, procede de fabrication et outil correspondant
US4851064A (en) * 1987-02-24 1989-07-25 Darbo Howard H Tear-off tape and method of making the same
US6410464B1 (en) * 1998-10-02 2002-06-25 3M Innovative Properties Company Hand-tearable tape

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2473046A (en) * 2009-08-28 2011-03-02 Personal Lifting Ltd A support element for a transfer trolley with a removable cover
WO2016186026A1 (ja) * 2015-05-15 2016-11-24 旭化成株式会社 フィルム収納容器、フィルム、フィルム巻回体及びフィルム収納体
JPWO2016186026A1 (ja) * 2015-05-15 2017-11-16 旭化成株式会社 フィルム収納容器、フィルム、フィルム巻回体及びフィルム収納体

Also Published As

Publication number Publication date
DE60227457D1 (de) 2008-08-21
US20030001034A1 (en) 2003-01-02
CA2385197A1 (en) 2002-12-29
ES2309120T3 (es) 2008-12-16
ATE400511T1 (de) 2008-07-15
ITTO20010110U1 (it) 2002-12-30
EP1270437B1 (de) 2008-07-09
EP1270437A3 (de) 2004-02-04
ITTO20010110V0 (it) 2001-06-29

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