EP0445705A1 - Verfahren und Vorrichtung zum hermetischen Umwickeln eines Gegenstandes mit einem synthetischen Film - Google Patents

Verfahren und Vorrichtung zum hermetischen Umwickeln eines Gegenstandes mit einem synthetischen Film Download PDF

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Publication number
EP0445705A1
EP0445705A1 EP91103239A EP91103239A EP0445705A1 EP 0445705 A1 EP0445705 A1 EP 0445705A1 EP 91103239 A EP91103239 A EP 91103239A EP 91103239 A EP91103239 A EP 91103239A EP 0445705 A1 EP0445705 A1 EP 0445705A1
Authority
EP
European Patent Office
Prior art keywords
film
heating
sheet
article
overlap
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.)
Withdrawn
Application number
EP91103239A
Other languages
English (en)
French (fr)
Inventor
Israel Sarid
Moshe Ginsberg
Ofer Ben-Ishai
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.)
SYFAN
Original Assignee
SYFAN
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 SYFAN filed Critical SYFAN
Publication of EP0445705A1 publication Critical patent/EP0445705A1/de
Withdrawn legal-status Critical Current

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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
    • B65B51/00—Devices for, or methods of, sealing or securing package folds or closures; Devices for gathering or twisting wrappers, or necks of bags
    • B65B51/10—Applying or generating heat or pressure or combinations thereof
    • B65B51/18—Applying or generating heat or pressure or combinations thereof by endless bands or chains
    • 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
    • B65B51/00—Devices for, or methods of, sealing or securing package folds or closures; Devices for gathering or twisting wrappers, or necks of bags
    • B65B51/10—Applying or generating heat or pressure or combinations thereof
    • B65B51/16—Applying or generating heat or pressure or combinations thereof by rotary members
    • 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
    • B65B53/00—Shrinking wrappers, containers, or container covers during or after packaging
    • B65B53/02—Shrinking wrappers, containers, or container covers during or after packaging by heat

Definitions

  • the present invention relates to a method and apparatus for tightly wrapping an article with a synthetic film. More particularly the invention relates to the use of shrink films for wrapping, labeling and the like purposes.
  • paper or plastic films for labeling purposes and for wrapping articles is known in the art.
  • polystyrene, polypropylene and PVC films are used as labeling material for bottles.
  • PVC and polyethylene shrink or non-shrink films are normally employed in wrapping both substantially two dimensional articles, such as magazines, and three-dimensional articles.
  • substantially two dimensional articles such as magazines, and three-dimensional articles.
  • the use of these films has been very limited for the following reasons.
  • sealing of the overlapping portions of the film is done by a variety of techniques, such as ionization, high-voltage and heat-seals, some of which require the melting of the film along the line of overlap. These techniques resul in connections which are relatively weak, and the appearance of which is bad due to the non uniform welding of the material.
  • Threee dimensional or rigid objects can normally withstand relatively high shrink forces, and thus shrink films can be used.
  • the resulting wrappings are not free from the need to provide a welding made along the overlapping part of the wrapping.
  • Is is another object of the invention to provide a method and apparatus by means of which substantially deformable and thin two dimensional objects can be wrapped using shrink films, to provide a tightly fitting wrapping without deformation.
  • films employed with the method and apparatus of the invention must have specific properties, which will become apparent as the present specification proceeds, and which will be apparent to the man of the art.
  • films employed for labeling purposes on deformable containers, such as PET bottles must have relatively low shrink forces, and preferably good adhesion properties, while adhesion is not desired when enveloping, e.g., sheets of paper.
  • Suitable shrink films are described, for instance, in copending Israeli Patent Applcation No. 92868, filed December 25, 1989, by the same applicant, the specification of which is incorporated herein by reference. Again, it is important to control the shrink force of the films, as one will like to provide low shrink tensions when enveloping a deformable object, while higher shrink tensions may be allowed when the object is substantially non-deformable.
  • weldings provided for sealing together the two layers which form the area of overlap result in a line having a bad appearance and unsatisfactory optical, sealing and strength properties.
  • the method for tightly wrapping an article or part thereof with a film comprises:
  • heat is applied together with pressure.
  • Heat may be applied by a variety of techniques, and preferred techniques are contact heat-exchange, forced convection and radiation.
  • the invention in another aspect, comprises a method for labeling a substantially tubular article, which method comprises providing a label made of a film as hereinbefore defined, wrapping the label around the tubular object and heating the label at least at the area of overlap, to obtain self-sealing thereof and shrink of the label. Shrink of the label is desirable, of course, as will be understood by the skilled person, to obtain a firm grip on the article.
  • pressure can be applied to the area of overlap to promote self-sealing.
  • This labeling method is particularly convenient when the article to be labeled is a bottle or a food or beverage can, particularly when these are made of deformable material, such as PET, as the shrink force can be controlled.
  • a method for wrapping a substantially two-dimensional object comprises providing a sheet made of a film as hereinbefore defined, enveloping the object providing an area of overlap therein, heat-sealing the open ends of the sheet and pressure-heating, at least at the area of the overlap, to obtain self-sealing thereof and, optionally, shrink of the envelope.
  • the heating cycle comprising a heating - cooling - heating - cooling sequence may be responsible for the improved results, particularly in the appearance of the final wrapping, which are better than those obtained when supplying the same amount of heat for the same time in a single step.
  • a method for wrapping a three-dimensional object comprises providing a sheet made of a film as hereinbefore defined, enveloping the object providing an area of overlap therein, heat-sealing the open ends of the sheet, pressure-heating the face of the object on which the area of overlap lies and heating one or more of the remaining surfaces of the object to obtain the shrinking of the film.
  • This heating to obtain the shrinking of the film can be effected by a variety of methods, such as contact or convection or radiation heating, or by a combination of two or more of the said heating methods.
  • the apparatus coprises two rotating cylinders, 1 and 1'. These cylinders are heated, by internal heating means or any other appropriate means, and they rotate to move an object, schematically indicated by 2, at the same time heating it and applying a pressure.
  • two results will be obtained, viz., the self-sealing of the area of overlap and the shrinking of the shrink film.
  • shrinking and sealing can be effected at the same time. In apparatus of the known art, sealing is done by one technique at one time, and shrinking is effected at a later time by entirely different methods.
  • the method of the invention not only provides better results, but is further convenient and economic.
  • two or more sets of cylinder couples, 1 and 1' may be provided in sequence, to effect different heating cycles.
  • the cylinders themselves can be made of, or coated with, different materials, such as stainless steel, silicone, etc., and the skilled engineer will be able to provide appropriate building materials for the desired heating conditions.
  • additional rotating cylinders 3 and 3' can be provided, which are shown in Fig. 1 in a detached position.
  • the two cylinders 3 and 3' will be brought into contact with the sides of article 2 and will also be heated, thus contributing to the shrinking fo the film which envelopes article 2 throughout most of its surface.
  • Cylinders 3 and 3' may contact the article 2 at the same time as cylinders 1 and 1', or may be positioned at a distance therefrom and act independently.
  • FIG. 2(a) is an elevated view of the article sealed by the technique shown in Fig. 1.
  • This article will have two open ends 4 and 4' which resulted from the wrapping up of the article by the sheet of material, which edges can be sealed by any known technique, such as by hot cutting or the like technique.
  • the area of overlap, 5, is clearly shown in the figure. This area results from the enveloping of the article by the sheet.
  • Fig. 2(b) this area is seen after self-sealing has been effected, as having a slightly thicker cross-section, indicated by numeral 6.
  • the sealing of the film is complete, it may be desirable to provide in the film some small openings to permit escape of air during press-sealing. This may be achieved, e.., by positioning a toothed wheel or the like device on the wrapping apparatus, which contacts the film before the article reaches the pressure area, and makes small openings therein. If such openings are not provided, air will create an escape at an uncontrolled location during pressure sealing. While this will generally result in acceptable products, it is desirable to be able to control the location, size and number of openings that will exist in the film.
  • Fig. 4 shows a diffrent arrangement, in which conveyor belts or ribbons are used instead of rotating cylinders.
  • two conveyor belts, 10 and 10' are shown, which amy be both heated, e.g., by plate 11 and 11', which can radiate heat toward the belt, or only one of the two belts can be heated.
  • the belts can be rotated in different directions, to achieve different modes of movement of a tubular object, such as tubular object 12 schematically shown in Fig. 4.
  • Turhtermore if the tubular object is a cylinder of the like, it may be convenient to leave an extra with of film at the extremities, which may be caused to shrink, e.g.
  • FIG. 5 Another possible arrangement of the belt is schematically shown in cross-section in Fig. 5.
  • a cross-section of a belt is shown which matches the shape of the article to be labeled, in this case a bottle.
  • a label 13 (shown in broken lines in the figure) is heated by means of heated belt 14 having the same shape, shrinking of the label at the changing diameter of the bottle, e.g., at the positions indicated by 15 and 16, is then achieved, and a strong grasp of the label on the bottle is obtained.
  • a labeling apparatus is schematically shown in Fig. 6.
  • the apparatus comprises a continuous lower conveyor belt 17, a first upper conveyor belt 18 and a second upper conveyor belt 19.
  • a bottle 20 entering the apparatus moves in the direction of the arrow by the movement of belts 17 and 18.
  • Preheating of the bottle can be effected, if desired, by heating elements 21.
  • a continuous labeling device (not shown) feeds labeling material 22 from a label roll 23, through nip rolls 24.
  • the label is guided toward the bottle 20 by means known to the skilled engineer and not shown for the sake of simplicity, and envelopes around it.
  • the continuous label 22 is then cut at the appropriate time by means known in the art (not shown), at a position between the bottle 20 and nip rolls 24.
  • the bottle on which the label is rolled is further moved on by the combined action of conveyor belts 17 and 19, and is heated while spinning by heating elements 21' of belt 17 and/or 25, of belt 19.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Labeling Devices (AREA)
EP91103239A 1990-03-07 1991-03-04 Verfahren und Vorrichtung zum hermetischen Umwickeln eines Gegenstandes mit einem synthetischen Film Withdrawn EP0445705A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IL93671A IL93671A0 (en) 1990-03-07 1990-03-07 Method and apparatus for tightly wrapping an article with a synthetic film
IL93671 1990-03-07

Publications (1)

Publication Number Publication Date
EP0445705A1 true EP0445705A1 (de) 1991-09-11

Family

ID=11060991

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91103239A Withdrawn EP0445705A1 (de) 1990-03-07 1991-03-04 Verfahren und Vorrichtung zum hermetischen Umwickeln eines Gegenstandes mit einem synthetischen Film

Country Status (3)

Country Link
EP (1) EP0445705A1 (de)
JP (1) JPH06122427A (de)
IL (1) IL93671A0 (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1055603A1 (de) * 1999-05-27 2000-11-29 G.D Societa' Per Azioni Verfahren und Vorrichtung zum Umhüllen eines Produktes mit einem Zuschnitt aus schrumpffähigem Verpackungsmaterial
DE102012207538A1 (de) * 2012-05-07 2013-11-07 Krones Ag Verfahren und Vorrichtung zum Anheften von Schrumpfhülsen auf Behältern
EP2565123B1 (de) 2011-09-02 2016-10-12 Dalli-Werke GmbH & Co. KG. Vorrichtung zur Weiterverarbeitung von in Folie eingehüllten Produkten
CN106275563A (zh) * 2011-12-23 2017-01-04 佛克有限及两合公司 用于制造具有收缩膜的包装件的方法和装置

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB752568A (en) * 1953-01-28 1956-07-11 Celanese Corp Improved process and apparatus for heat-sealing of films comprising thermoplastic material
DE1177067B (de) * 1960-03-24 1964-08-27 Strunck & Co Maschf H Verfahren und Vorrichtung zum Einwickeln und gegebenenfalls zum Etikettieren von runden sowie sechs- und mehreckigen Koerpern
US3385028A (en) * 1965-02-02 1968-05-28 Du Pont Packaging machine
DE1800529A1 (de) * 1967-10-03 1969-08-28 Grace W R & Co Vorrichtung zum festen Einwickeln von leicht rollbaren Gegenstaenden in einem Bogen aus waermeschrumpffaehigem Material
GB2015423A (en) * 1978-03-03 1979-09-12 Toyo Syokuhin Kikai Kk Wrapping machine
EP0245817A1 (de) * 1986-05-12 1987-11-19 Kabushiki Kaisha Fuji Seisakusho Verfahren zum Verpacken von Gegenständen in einer Folie
US4715166A (en) * 1987-01-07 1987-12-29 Tokiwa Kogyo Co., Ltd. Film packaging apparatus

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB752568A (en) * 1953-01-28 1956-07-11 Celanese Corp Improved process and apparatus for heat-sealing of films comprising thermoplastic material
DE1177067B (de) * 1960-03-24 1964-08-27 Strunck & Co Maschf H Verfahren und Vorrichtung zum Einwickeln und gegebenenfalls zum Etikettieren von runden sowie sechs- und mehreckigen Koerpern
US3385028A (en) * 1965-02-02 1968-05-28 Du Pont Packaging machine
DE1800529A1 (de) * 1967-10-03 1969-08-28 Grace W R & Co Vorrichtung zum festen Einwickeln von leicht rollbaren Gegenstaenden in einem Bogen aus waermeschrumpffaehigem Material
GB2015423A (en) * 1978-03-03 1979-09-12 Toyo Syokuhin Kikai Kk Wrapping machine
EP0245817A1 (de) * 1986-05-12 1987-11-19 Kabushiki Kaisha Fuji Seisakusho Verfahren zum Verpacken von Gegenständen in einer Folie
US4715166A (en) * 1987-01-07 1987-12-29 Tokiwa Kogyo Co., Ltd. Film packaging apparatus

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1055603A1 (de) * 1999-05-27 2000-11-29 G.D Societa' Per Azioni Verfahren und Vorrichtung zum Umhüllen eines Produktes mit einem Zuschnitt aus schrumpffähigem Verpackungsmaterial
EP2565123B1 (de) 2011-09-02 2016-10-12 Dalli-Werke GmbH & Co. KG. Vorrichtung zur Weiterverarbeitung von in Folie eingehüllten Produkten
CN106275563A (zh) * 2011-12-23 2017-01-04 佛克有限及两合公司 用于制造具有收缩膜的包装件的方法和装置
CN106275563B (zh) * 2011-12-23 2019-07-16 佛克有限及两合公司 用于制造具有收缩膜的包装件的方法和装置
DE102012207538A1 (de) * 2012-05-07 2013-11-07 Krones Ag Verfahren und Vorrichtung zum Anheften von Schrumpfhülsen auf Behältern

Also Published As

Publication number Publication date
JPH06122427A (ja) 1994-05-06
IL93671A0 (en) 1990-12-23

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