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US20070056252A1 - Cover film stretching device - Google Patents

Cover film stretching device Download PDF

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Publication number
US20070056252A1
US20070056252A1 US10/554,467 US55446704A US2007056252A1 US 20070056252 A1 US20070056252 A1 US 20070056252A1 US 55446704 A US55446704 A US 55446704A US 2007056252 A1 US2007056252 A1 US 2007056252A1
Authority
US
United States
Prior art keywords
cover film
packaging
film
troughs
stretching
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.)
Abandoned
Application number
US10/554,467
Other languages
English (en)
Inventor
Thomas Wetter
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.)
GEA CFS Germany GmbH
Original Assignee
Individual
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 Individual filed Critical Individual
Assigned to CFS GERMANY GMBH reassignment CFS GERMANY GMBH ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: WETTER, THOMAS
Publication of US20070056252A1 publication Critical patent/US20070056252A1/en
Abandoned 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
    • B65B9/00—Enclosing successive articles, or quantities of material, e.g. liquids or semiliquids, in flat, folded, or tubular webs of flexible sheet material; Subdividing filled flexible tubes to form packages
    • B65B9/02—Enclosing successive articles, or quantities of material between opposed webs
    • B65B9/04—Enclosing successive articles, or quantities of material between opposed webs one or both webs being formed with pockets for the reception of the articles, or of the quantities of material
    • 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
    • B65B41/00—Supplying or feeding container-forming sheets or wrapping material
    • B65B41/18—Registering sheets, blanks, or webs

Definitions

  • the present invention relates to a packaging machine, by means of which packaging troughs are filled with packagable material and closed by a cover film, wherein the packaging troughs are moved intermittently along the packaging machine and the cover film is stretched for its exact positioning above the packaging troughs.
  • the present invention further relates to a method of sealing a cover film onto packaging troughs.
  • plastic packs consist of a so-called packaging trough, into which the packagable material is introduced, and a cover film, which is sealed onto the packaging trough and by which the packaging trough is closed.
  • cover films are increasingly often imprinted with trade marks or product information, an exact positioning of the printed image of the cover film above the packaging trough has to be undertaken prior to sealing.
  • cover film is desirable for the cover film to be sealed in a tightly stretched manner onto the packaging trough. This is achieved in particular by the printed images of the cover film being slightly smaller than the cross section of the packaging troughs that is to be sealed, with the result that the cover film has to be stretched (oriented) prior to sealing.
  • this stretching is effected by the forward draw of the packaging troughs in that unwinding of the cover film is stopped shortly before completion of the forward draw of the packaging troughs.
  • This procedure does however have the drawback that the printed image of the cover film is sometimes not positioned precisely enough above the packaging troughs.
  • the underlying object of the present invention is therefore to provide a packaging machine, and a method of sealing the cover film onto packaging troughs, with which the printed images of the imprinted cover film may be positioned very precisely above the packaging troughs and sealed onto them.
  • the object is achieved according to the invention by a packaging machine, by means of which packaging troughs are filled with packagable material and closed by a cover film and in which the cover film is stretched for its exact positioning above the packaging troughs and which has a stretching device that is not based on the movement of the packaging troughs.
  • the packaging machine according to the invention is easy and economical to manufacture and to operate.
  • the stretching device has a clamping means, by which the cover film is fixed in such a way that it may be stretched.
  • a clamping means any clamping means known to the person skilled in the art and by which fixing of the cover film may be effected rapidly, reversibly and without impairment of the cover film, is conceivable.
  • An inflatable tube is mentioned here purely by way of example.
  • the stretching device moreover preferably has a shifting means, by which the clamping means may be shifted in such a way that the cover film stretches to the desired length.
  • the shifting means is preferably infinitely adjustable.
  • the packaging machine according to the invention has a photocell, by means of which print marks disposed in each case between two printed images are detected.
  • the cover film is wound into a film roll, which in turn is supported on a roll holder.
  • the cover film is preferably tensioned by means of a dancer roll.
  • the present invention further relates to a method of sealing a cover film onto packaging troughs that are moved intermittently along a packaging machine, whereby the cover film is stretched for its exact positioning above the packaging troughs and then sealed and whereby the stretching of the cover film is effected without the aid of the movement of the packaging troughs.
  • the method according to the invention has the advantage that the printed images on the cover film may be positioned very precisely above the packaging troughs.
  • the method is easy and economical to implement.
  • the cover film is fixed, in a particularly preferred manner sealed, onto at least one packaging trough and the cover film is unwound from a film roll by the intermittent forward draw of the packaging trough and, as soon as the forward draw of the packaging trough is complete, is fixed by a clamping means, stretched and then sealed.
  • the actual position of print marks is detected.
  • the actual position thus determined is compared with a setpoint position and, based on the comparison, the measure of stretching (orienting) of the cover film is determined.
  • the measure of maximum stretching is limited by the film formulation.
  • FIG. 1 shows a cover film stretching device having a photocell and having a stretching device with positional data.
  • FIG. 2 shows a cover film stretching device having a displaceable photocell.
  • FIG. 1 shows the packaging machine according to the invention (only partially illustrated), in particular the stretching device and sealing unit.
  • the packaging troughs 1 are conveyed along the packaging machine in the conveying direction denoted by arrow 12 .
  • the person skilled in the art will appreciate that in the paper plane a plurality of packaging troughs may be disposed one behind the other.
  • the cover film 2 is sealed onto the packing troughs 1 ′ situated at that time in the sealing chamber.
  • the lower sealing tool 15 is moved up and down, as illustrated by the double arrow, so that the cover film 2 is sealed under the influence of temperature and pressure onto the packaging troughs 1 ′.
  • the packaging troughs are moved on.
  • the cover film is connected to the packaging troughs 1 ′, upon forward feed of the packaging troughs the cover film 2 is unwound from the film roll 9 , which is disposed on the roll holder 10 .
  • the actual position of the print marks 8 which are situated on the cover film and delimit in each case one printed image, is determined and in a central control unit the difference between the actual value and a defined setpoint value is determined. This difference is then the measure for the stretching length, which arises from the difference between actual value and setpoint value.
  • the clamping means 5 which in the present case is an inflatable tube, is activated and fixes the cover film 2 .
  • the cover film is then stretched by the calculated measure (oriented) by the shifting means 6 .
  • the shifting means is displaced counter to the direction of travel of the cover film.
  • the shifting means in the present case is driven by a stepping motor or servomotor.
  • As the cover film is fixed in the stretching direction 4 , it is oriented (stretched).
  • sealing is effected in the previously described manner.
  • the clamping means 5 is released and the shifting means 6 is returned to its starting position.
  • the movement of the shifting means is symbolized by the double arrow.
  • the method is modified as follows. First, the printed image of the upper film is placed as precisely as possible onto the lower film and/or the packaging troughs deep-drawn therein and then by means of a measurement the distance between the photocell 7 and the reference print mark 8 ′ is determined. This distance is the so-called setpoint value, which is communicated for example via a control panel to a central control unit. The machine is then switched on and the cover film 2 is sealed onto the packaging trough 1 ′. Upon each forward draw of the lower film having the packaging troughs, the cover film sealed onto these packaging troughs is unwound and the actual position of the print marks is determined by the photocell 7 .
  • the difference between the setpoint position and the actual position is the measure of the respective stretching length. Should the required stretching length exceed the maximum stretching length permissible for the material, the stretching of the cover film is limited to this maximum stretching length.
  • the upper film on completion of the forward draw is fixed by the clamping means 5 and the shifting means 6 is displaced counter to the direction of travel of the film in accordance with the defined stretching length.
  • the determined setpoint value is stored in the formulation of the film and/or of the product associated with this film in the machine.
  • a change of cover film merely involves inserting the film into the packaging machine and downloading the appropriate formulation and hence the setpoint value from a central control unit. After start-up of the machine, the printed image is then automatically positioned by the system extremely precisely above the lower film and/or the packaging troughs therein by virtue of determination of the print mark actual position and subsequent stretching. The system also limits the maximum stretching length per stretching operation to prevent tearing of the cover film. This maximum stretching length is likewise included in the stored formulation.
  • FIG. 2 shows a cover film stretching device according to FIG. 1 , except that in the present case the photocell is supported displaceably, this being illustrated by the double arrow.
  • the stretching device according to FIG. 2 moreover has, instead of a shifting means with positional data, a shifting means with a position cut-out. Otherwise, the description pertaining to FIG. 1 applies.
  • the photocell is displaceable in and counter to the direction of travel of the film. By means of the, in the present case, manual displacement of the photocell the setpoint position of the print mark is adjusted for the respective type of film.
  • the photocell first of all registers whether during the forward draw of the film a print mark has run past the photocell.
  • the stretching device 4 stretches the cover film 2 until the photocell 7 once again detects the print mark that has run past.
  • the stretching device 4 is driven by a cylinder (not shown), to which no positional data may be supplied.
  • the stretching operation is terminated and the film is fixed by sealing onto the packaging troughs.
  • the full available stroke of the cylinder is executed.
  • This embodiment of the present invention is suitable in particular for drives of the stretching machine 4 without positional data, such as e.g. cylinders.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Containers And Plastic Fillers For Packaging (AREA)
  • Basic Packing Technique (AREA)
  • Closing Of Containers (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
  • Shaping By String And By Release Of Stress In Plastics And The Like (AREA)
  • Laminated Bodies (AREA)
US10/554,467 2003-04-29 2004-04-26 Cover film stretching device Abandoned US20070056252A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10319420.7 2003-04-29
DE10319420A DE10319420A1 (de) 2003-04-29 2003-04-29 Deckelfolienreckeinrichtung
PCT/EP2004/004394 WO2004096645A1 (de) 2003-04-29 2004-04-26 Deckelfolienreckeinrichtung

Publications (1)

Publication Number Publication Date
US20070056252A1 true US20070056252A1 (en) 2007-03-15

Family

ID=33305047

Family Applications (1)

Application Number Title Priority Date Filing Date
US10/554,467 Abandoned US20070056252A1 (en) 2003-04-29 2004-04-26 Cover film stretching device

Country Status (10)

Country Link
US (1) US20070056252A1 (zh)
EP (1) EP1620317B1 (zh)
CN (1) CN1860063A (zh)
AT (1) ATE344184T1 (zh)
DE (2) DE10319420A1 (zh)
DK (1) DK1620317T3 (zh)
ES (1) ES2299834T3 (zh)
NO (1) NO20054978L (zh)
PL (1) PL1620317T3 (zh)
WO (1) WO2004096645A1 (zh)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20120096809A1 (en) * 2010-10-20 2012-04-26 Multivac Sepp Haggenmueller Gmbh & Co. Kg Thermoform packaging machine and method for stretching a film web
US20220194645A1 (en) * 2019-04-11 2022-06-23 Syntegon Technology Gmbh Method and device for processing a cover of a package
US11485103B2 (en) * 2017-03-31 2022-11-01 I.M.A. Industria Macchine Automatiche S.P.A. Method and apparatus for manufacturing pouches

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010012571A1 (de) * 2010-03-23 2011-09-29 Lemo Maschinenbau Gmbh Verfahren und Vorrichtung zum rapportgenauen Positionieren von mindestens zwei sich bewegenden Lagen aus Kunststofffolie
DE102011012983B4 (de) 2011-03-03 2023-06-22 Gea Food Solutions Germany Gmbh Verpackungsmaschine zur Herstellung von Verpackungen aus bedruckten Warenbahnen
BR112017011887B1 (pt) * 2014-12-05 2022-02-15 Gea Food Solutions Germany Gmbh Máquina de embalagem
CN105966060A (zh) * 2016-07-04 2016-09-28 贵州劲瑞新型包装材料有限公司 一种薄膜上图案定位印刷系统及印刷方法
EP4582349A2 (de) 2019-05-10 2025-07-09 Gea Food Solutions Germany GmbH Verpackungsmaschine ohne tänzer
CN110239795A (zh) * 2019-06-28 2019-09-17 湖北鸭酷科技有限公司 一种用于包装的印刷片材定位方法
CN110239777B (zh) * 2019-06-28 2021-09-21 湖北周黑鸭食品工业园有限公司 一种包装容器的制备方法及包装容器
DE102020209819A1 (de) 2020-08-04 2022-02-10 Multivac Sepp Haggenmüller Se & Co. Kg Folienklemmung

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3374602A (en) * 1965-08-18 1968-03-26 Mahaffy & Harder Eng Co Indicia registration method and apparatus
US3555768A (en) * 1968-02-26 1971-01-19 Continental Can Co Method and apparatus for handling and registering webs for forming packages
US3762125A (en) * 1971-03-17 1973-10-02 Morrell & Co John Film registration apparatus
US3908331A (en) * 1972-11-09 1975-09-30 Applic Plastique Mec Elec Web registration method and apparatus
US4018028A (en) * 1971-07-23 1977-04-19 Societe D'application Plastique Mecanique Et Electronique, Plastimecanique S.A. Arrangement for aligning heat-sealable lids on mating product-filled containers
US7100345B2 (en) * 2000-11-24 2006-09-05 Cfs Germany Gmbh Device for positioning a web of film of a packaging device
US7121063B2 (en) * 2003-08-21 2006-10-17 Illinois Tool Works Inc. Method for controlling zipper tension in packaging equipment

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1330729A (fr) * 1961-07-28 1963-06-28 Perfectionnements apportés aux machines à former des récipients clos par un couvercle doté d'une étiquette
DE2021874A1 (de) * 1970-05-05 1971-11-25 Stranghoener Kg Maschinenfabri Verpackungsmaschine
DE3039616A1 (de) * 1980-10-21 1982-05-19 Robert Bosch Gmbh, 7000 Stuttgart Verfahren und vorrichtung zum registerhaltigen zusammenfuehren zweier kontinuierlich vorbewegter folienbahnen

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3374602A (en) * 1965-08-18 1968-03-26 Mahaffy & Harder Eng Co Indicia registration method and apparatus
US3555768A (en) * 1968-02-26 1971-01-19 Continental Can Co Method and apparatus for handling and registering webs for forming packages
US3762125A (en) * 1971-03-17 1973-10-02 Morrell & Co John Film registration apparatus
US4018028A (en) * 1971-07-23 1977-04-19 Societe D'application Plastique Mecanique Et Electronique, Plastimecanique S.A. Arrangement for aligning heat-sealable lids on mating product-filled containers
US3908331A (en) * 1972-11-09 1975-09-30 Applic Plastique Mec Elec Web registration method and apparatus
US7100345B2 (en) * 2000-11-24 2006-09-05 Cfs Germany Gmbh Device for positioning a web of film of a packaging device
US7121063B2 (en) * 2003-08-21 2006-10-17 Illinois Tool Works Inc. Method for controlling zipper tension in packaging equipment

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20120096809A1 (en) * 2010-10-20 2012-04-26 Multivac Sepp Haggenmueller Gmbh & Co. Kg Thermoform packaging machine and method for stretching a film web
US9180987B2 (en) * 2010-10-20 2015-11-10 Multivac Sepp Haggenmueller Gmbh & Co. Kg Thermoform packaging machine and method for stretching a film web
US11485103B2 (en) * 2017-03-31 2022-11-01 I.M.A. Industria Macchine Automatiche S.P.A. Method and apparatus for manufacturing pouches
US20220194645A1 (en) * 2019-04-11 2022-06-23 Syntegon Technology Gmbh Method and device for processing a cover of a package
US11981470B2 (en) * 2019-04-11 2024-05-14 Syntegon Technology Gmbh Method and device for processing a cover of a package

Also Published As

Publication number Publication date
DK1620317T3 (da) 2007-03-26
PL1620317T3 (pl) 2007-05-31
ES2299834T3 (es) 2008-06-01
DE10319420A1 (de) 2004-11-18
NO20054978L (no) 2005-10-26
CN1860063A (zh) 2006-11-08
DE502004001910D1 (de) 2006-12-14
EP1620317A1 (de) 2006-02-01
EP1620317B1 (de) 2006-11-02
WO2004096645A1 (de) 2004-11-11
ATE344184T1 (de) 2006-11-15

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Legal Events

Date Code Title Description
AS Assignment

Owner name: CFS GERMANY GMBH, GERMANY

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:WETTER, THOMAS;REEL/FRAME:018273/0507

Effective date: 20060120

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION