EP0106825A1 - Umwickeln von Waren mit bandförmigem Material - Google Patents

Umwickeln von Waren mit bandförmigem Material Download PDF

Info

Publication number
EP0106825A1
EP0106825A1 EP83850270A EP83850270A EP0106825A1 EP 0106825 A1 EP0106825 A1 EP 0106825A1 EP 83850270 A EP83850270 A EP 83850270A EP 83850270 A EP83850270 A EP 83850270A EP 0106825 A1 EP0106825 A1 EP 0106825A1
Authority
EP
European Patent Office
Prior art keywords
web
product
stock
strips
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.)
Ceased
Application number
EP83850270A
Other languages
English (en)
French (fr)
Inventor
Karl Johan Back
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.)
Stretch Emballering AB
Original Assignee
Stretch Emballering AB
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 Stretch Emballering AB filed Critical Stretch Emballering AB
Publication of EP0106825A1 publication Critical patent/EP0106825A1/de
Ceased 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
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B11/00—Wrapping, e.g. partially or wholly enclosing, articles or quantities of material, in strips, sheets or blanks, of flexible material
    • B65B11/04—Wrapping, e.g. partially or wholly enclosing, articles or quantities of material, in strips, sheets or blanks, of flexible material the articles being rotated
    • B65B11/045—Wrapping, e.g. partially or wholly enclosing, articles or quantities of material, in strips, sheets or blanks, of flexible material the articles being rotated by rotating platforms supporting the articles

Definitions

  • the invention relates to a method in wrapping a product, where a web-like wrapping material is wound round the product.
  • the invention also relates to a store of a wrapping material web which is to be wound round the product for carrying out the method.
  • the invention also relates to an apparatus for wrapping a product.
  • goods are often wrapped by being wound round with a material web consisting of stretch film, for example.
  • the wrapping operation is accomplished by the goods, e.g. a pallet with a stack of articles, being rotated about its axle relative a store of web-like wrapping material so that the latter is wound round the goods.
  • the goods e.g. a pallet with a stack of articles
  • the wrapping operation is accomplished by the goods, e.g. a pallet with a stack of articles, being rotated about its axle relative a store of web-like wrapping material so that the latter is wound round the goods.
  • substantial wrinkling of the film transverse its winding direction, as well as enclosure of air between the film and the goods or underlying turns of the film is not given the desired smoothness and transparency.
  • a desire often recurring is to have the wrapping web of substantially the same height as the goods, at least when the latter has a uniform cross section along an axis at right angles to the longitudinal direction of the wrapping material web, and parallel to the plane of the web.
  • the winding speed is preferably kept as heigh as possible as well.
  • An object of the invention is therefore to propose a method,an apparatus and a wrapping material web store which substantially limit the air enclosrues in the wrapping, limit the tendency of the web to wrinkle transverse its longitudinal direction on the goods, and thereby permit increased winding speed and/or increased width of the material web.
  • the inventive method relates to wrapping a product by winding a web-like wrapping material, preferably stretch film,about the product.
  • the wrapping material is wound in the form of at least two parallel strips running substantially edge to edge, which in consecutive length sections are separated from each other along at least a portion of the section length.
  • the strip material can be arranged in the form of a coil which is orbitted relative the product in an encompassing path round the product while being drawn out and wound round the product.
  • the method is particularly well found in the cases where the surface of the product to be wrapped has varying distance from the rotational centre of the film orbitting along its wrapping periphery.
  • the strip material can be arranged in the form of a single web in a store, e.g. a web material coil, which is orbitted relative the product, the web being slit while being withdrawn from the store to form the said strips.
  • a store e.g. a web material coil, which is orbitted relative the product, the web being slit while being withdrawn from the store to form the said strips.
  • a store of a wrapping material web which is to be wound round a product for carrying out the method is essentially distinguished in that the web has the form of two strips which are substantially parallel and run edge to edge during withdrawal from the store, said strips being separated from each other, at least along a portion of the length of the section, in consecutively following length sections.
  • the web may be perforated, the perforations preferably having the form of slits which extend in the longitudinal direction of the web.
  • the strips of the material web can also be completely separated and arranged as contiguous coils on a common core.
  • the outer end of the web may be arranged cuneiformed with the tip of the cuneiform shape at the web end, and substantially at the parting line between the strips of the web.
  • a preferably weakly adhesive glue spot can be arranged between the tip portion of the web and the nearest underlying turn of the web.
  • Detection marking can furthermore be arranged on the web in the area of the end of the web, such marking being a spot of ferromagnetic material, for example, which can be detected for indicating the need of new web stock.
  • the apparatus comprises a conventional wrapping device that is holder for a stock of or guide for a wrapping material web and means for relatively rotating the holder or guide and the article so as to wrap the article, and is distinguished by means for slitting the web in a position between the article and the holder or guide, said slitting means being arranged to slit the web into at least two strips as it passes the slitting means during a wrapping operation.
  • Fig. 1 schematically illustrates a wrapping plant with a stock of material web in accordance with the invention.
  • Fig. 2 schematically illustrates an alternative plant in which the method and stock in accordance with the invention may be utilized.
  • Fig. 3 schematically illustrates the function of the inventive technique.
  • Fig. 4 schematically illustrates a stock in accordance with the invention.
  • Fig. 5 schematically illustrates an alternative stock in accordance with the invention.
  • Fig. 6 illustrates an apparatus for carrying out the method in accordance with the invention.
  • Fig. 7 is a view taken along the line VII-VII in Fig. 6.
  • a cylindrical product 1 is illustrated in Fig. 1, e.g. a paper coil from a paper mill.
  • the coil 1 is to be wrapped with a web 2 of stretch film.
  • the coil 1 is carried by two parallel, spaced rotating rolls 3, so that the coil 1 rotates about its axis 4, which can be assumed to be in a horizontal plane.
  • the web 2 is then unwound in the horizontal plane about the roll 1 while being withdrawn from a stock coil 7 carried by, and orbited about an axis 5, which is thus vertical and placed approximately directly above the product 1.
  • the stretch film 2 is pierced along the whole of its length to form two strips 21 which are kept together by the material remaining between the individual perforations 10.
  • this minimization can be achieved by two measures, namely utilizing as wide a web 2 as possible, and by orbiting the stock 7 at a speed as great as possible about the axis 5 relative the product 1.
  • Fig. 3 there is here illustrated a side view of the product 1 in Fig. 1, and the film 2 is schematically depicted such as it appears after having been wound about the end edge of the product 1.
  • the web 2 will have a curved profile due to the slipstream, and furthermore this curved configuration is emphasized by the film 2 being curved by contact with the end edge of the product 1.
  • the result will be that the end edges of the film 2 will come into contact with the product while encapsulating air in a space 8 between the film 2 and the surface of the product 1.
  • Due to the perforations 10, the air which tends to be encapsulated can flow out again through said perforations, as illustrated by the arrows in Fig. 3.
  • the perforations 10 also let air through during the winding process itself, before the film part pulled out from the stock 7, has yet come into contact with the product 1, for which reason the film 2 will not assume such an accentuated curvilinear configuration.
  • the transverse profile of the film 2 will not be as curved, and this means in turn that the heavy transverse wrinkling of the film 2 previoulsy experienced along the cylindrical surface of the product 1 will not be so accentuated as previously.
  • Fig. 2 illustrates a standing stack 1a of articles, e.g. such as are carried on a pallet, this stack being rotated on a turntable 30 while the film stock 7 is vertically raisable and lowerable, the film 2 being wound onto a mantle surface of the stack 1 by rotation of the turntable 30.
  • the stretch film 2 will tend to assume the curved profile illustrated in Fig. 3, this tendency being heavily reduced, however, by the inventive perforations 10.
  • Fig. 4 illustrates a stock in accordance with the invention, in the form of a coil 7 of a stretch film web 2 divided into two strips 21 with the aid of a perforation 10.
  • Fig. 5 illustrates an alternative stock in accordance with the invention, comprising a coil 7 of a stretch film web 2, which is pierced along the whole of its length by a slit 100 to form two completely separate strips 21 lying edge to edge, adapted on a common core 18.
  • Figs. 6 and 7 illustrate how the stock 7 may consist of a stretch film web without any perforations or slits, the stock being arrangeCL in the form of a roll from which the stretch film web is wound off.
  • a disc-like serrated slitting knife 41 is arranged in contact with the web 2, which is drawn from the stock 7 such that under rotation the knife perforates the web with a plurality of slits 10 as illustrated in Fig. 7, the inventive effect thus occurring.
  • the forward end of the stretch film may be "cuneiform and provided with a glue spot 40 for retaining the film end on the roll during transport of the film roll, and also serving to allow simple connection of the outer end of a new coil of film to the inner end of a coil of film which is about to become exhausted.
  • the stretch film in the area of its terminal end may be provided with a detectable marking, e.g. in the form of a magnetically or optically detectable spot, which can be read off for indicating the need of replacing a film stock with a new one.
  • the web 2 is perforated or slit at preferably about half its width, when two strips 21 are to be formed. If more strips are to be formed, the slits or perforations are placed so that the strips are mutually just as wide.
  • the inventive technique has its use, particularly when the strips are wound with partial overlapping of the turns, whereby the slits, perforations or the like, of the web will be covered by the strips in turns lying on top.
  • the web material is generally air tight or air catching, in an extent such that it tends to behave in the manner described in the background portion of the specification.
  • a typical web material with such properties is plastics stretch film, but the invention is applicable also for other conventional wrapping webs, such as plastics foils or paper, which are used not only for stabilizing the wrapped article or article stack, but also for protecting the article or stack against the environment, e.g. rain.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Basic Packing Technique (AREA)
  • Wrapping Of Specific Fragile Articles (AREA)
  • Package Frames And Binding Bands (AREA)
  • Wrappers (AREA)
EP83850270A 1982-10-20 1983-10-10 Umwickeln von Waren mit bandförmigem Material Ceased EP0106825A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE8205969 1982-10-20
SE8205969A SE454872B (sv) 1982-10-20 1982-10-20 Forfarande och apparat for emballering av en produkt

Publications (1)

Publication Number Publication Date
EP0106825A1 true EP0106825A1 (de) 1984-04-25

Family

ID=20348287

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83850270A Ceased EP0106825A1 (de) 1982-10-20 1983-10-10 Umwickeln von Waren mit bandförmigem Material

Country Status (4)

Country Link
EP (1) EP0106825A1 (de)
JP (1) JPS5993612A (de)
FI (1) FI833750A7 (de)
SE (1) SE454872B (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1002728A1 (de) 1998-11-17 2000-05-24 Eastman Kodak Company Vorrichtung zum Perforieren einer Folie

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1063656A (zh) * 1990-05-28 1992-08-19 日本石油化学株式会社 包装方法及其装置

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3043071A (en) * 1960-02-29 1962-07-10 J B Dove & Sons Inc Packaging machine
US4079565A (en) * 1974-03-25 1978-03-21 Lantech Inc. Stretch-wrapped package, process and apparatus
US4281500A (en) * 1979-07-13 1981-08-04 Wisconsin Tissue Mills Inc. Wrapping apparatus and method

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3043071A (en) * 1960-02-29 1962-07-10 J B Dove & Sons Inc Packaging machine
US4079565A (en) * 1974-03-25 1978-03-21 Lantech Inc. Stretch-wrapped package, process and apparatus
US4281500A (en) * 1979-07-13 1981-08-04 Wisconsin Tissue Mills Inc. Wrapping apparatus and method

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1002728A1 (de) 1998-11-17 2000-05-24 Eastman Kodak Company Vorrichtung zum Perforieren einer Folie

Also Published As

Publication number Publication date
SE8205969D0 (sv) 1982-10-20
FI833750L (fi) 1984-04-21
FI833750A7 (fi) 1984-04-21
FI833750A0 (fi) 1983-10-14
SE454872B (sv) 1988-06-06
JPS5993612A (ja) 1984-05-30
SE8205969L (sv) 1984-04-21

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Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): DE FR GB IT

17P Request for examination filed

Effective date: 19841017

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION HAS BEEN REFUSED

18R Application refused

Effective date: 19860722

RIN1 Information on inventor provided before grant (corrected)

Inventor name: BACK, KARL JOHAN