EP3034417A1 - Film wrapping using a single roll - Google Patents

Film wrapping using a single roll Download PDF

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Publication number
EP3034417A1
EP3034417A1 EP14199505.0A EP14199505A EP3034417A1 EP 3034417 A1 EP3034417 A1 EP 3034417A1 EP 14199505 A EP14199505 A EP 14199505A EP 3034417 A1 EP3034417 A1 EP 3034417A1
Authority
EP
European Patent Office
Prior art keywords
film
product
roll
means
sealing
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
EP14199505.0A
Other languages
German (de)
French (fr)
Other versions
EP3034417B1 (en
Inventor
Alain Cerf
Original Assignee
Alain Cerf
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 Alain Cerf filed Critical Alain Cerf
Priority to EP14199505.0A priority Critical patent/EP3034417B1/en
Publication of EP3034417A1 publication Critical patent/EP3034417A1/en
Application granted granted Critical
Publication of EP3034417B1 publication Critical patent/EP3034417B1/en
Application status is Active legal-status Critical
Anticipated expiration legal-status Critical

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65BMACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B9/00Enclosing 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
    • B65B9/02Enclosing successive articles, or quantities of material between opposed webs
    • B65B9/026Enclosing successive articles, or quantities of material between opposed webs the webs forming a curtain
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65BMACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B11/00Wrapping, e.g. partially or wholly enclosing, articles or quantities of material, in strips, sheets or blanks, of flexible material
    • B65B11/06Wrapping articles, or quantities of material, by conveying wrapper and contents in common defined paths
    • B65B11/08Wrapping articles, or quantities of material, by conveying wrapper and contents in common defined paths in a single straight path
    • B65B11/10Wrapping articles, or quantities of material, by conveying wrapper and contents in common defined paths in a single straight path to fold the wrappers in tubular form about contents
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65BMACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B41/00Supplying or feeding container-forming sheets or wrapping material
    • B65B41/18Registering sheets, blanks, or webs
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65BMACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B59/00Arrangements to enable machines to handle articles of different sizes, to produce packages of different sizes, to vary the contents of packages, to handle different types of packaging material, or to give access for cleaning or maintenance purposes
    • B65B59/02Arrangements to enable adjustments to be made while the machine is running
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65BMACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B2210/00Specific aspects of the packaging machine
    • B65B2210/04Customised on demand packaging by determining a specific characteristic, e.g. shape or height, of articles or material to be packaged and selecting, creating or adapting a packaging accordingly, e.g. making a carton starting from web material
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65BMACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B51/00Devices for, or methods of, sealing or securing package folds or closures; Devices for gathering or twisting wrappers, or necks of bags
    • B65B51/10Applying or generating heat or pressure or combinations thereof
    • B65B51/14Applying or generating heat or pressure or combinations thereof by reciprocating or oscillating members
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65BMACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B53/00Shrinking wrappers, containers, or container covers during or after packaging
    • B65B53/02Shrinking wrappers, containers, or container covers during or after packaging by heat

Abstract

This invention is to register printed film (16) on product (12) while wrapping the printed film from a single roll (10). This is achieved by using a sensor (9) that can read a mark on the film (16) in order to insure that a predetermined length of film (16) is pulled off the roll (10) and the printed portion of the film (16) is in registration with the product (12). The marks on the film (16) establish the amount of film (16) needed to wrap the product (12). A sensor (9) such as a photo sensor reads the mark and determines whether the proper length of the film (16) has been pulled off the roll (10). When the amount of film (16) pulled of the roll (10) does not coincided with sensor (9) reading, the distance between where the product (12) stops and the sealing bar (8) is varied. This allows the length of the film (16) to be adjusted until the sensor (9) readings and the length of the film (16) coincides.

Description

    Field of the invention
  • This invention relates to wrapping a product with heat shrinkable film by pushing the product into a curtain of film while wrapping the article from a single roll and achieving print registration.
  • Background of the Invention
  • The prior art shows in figure 1 an upper roll 4 having an upper film 5 bonded to a lower film 6 on lower roll 7 to create a film curtain. The upper film is usually a short piece of film. A portion of the bonded film rests on a bucket 2 attached to conveyor 3. A product 1 is placed on the film resting on the bucket 2. The bucket 3 is pushed into a curtain of film. The upper film does not move. The lower film is pulled over product to wrap the product with the movement of the bucket conveyor.
  • After the film covers the product a seal bar seals the film at the back of the article. The seal bar simultaneously cuts the film and seals the film together on both sides of the cut. This creates a new curtain and seals the film wrap around the article. After sealing, the upper roll is pulled a few millimeters to allow an unsealed sealed surface for cutting and sealing the next product on the bucket conveyor. The films used in the prior art did not require print registration.
  • Summary of the invention
  • The objective of this invention is to register the printed film using the film on a single roll on the product. This is achieved by using a sensor that can read a mark on the film in order to insure that a predetermined length of film is pulled off a roll and the printed portion of the film is in registration with the product. The marks on the film establish the amount of film needed to wrap the product. A sensor such as a photo sensor reads the mark and determines whether the proper length of the film has been pulled off the roll. When the amount of film pulled of the roll does not coincided with sensor reading, the distance between where the product stops and the sealing bar is varied. This allows the length of the film to be adjusted until the sensor readings and the length of the film coincides. When the length of the film and sensor readings coincides the print will be properly registered with the product position of the product. If the sensor reads the mark too soon the product will stop closer to the sealing bar. If the sensor reading is late, the product is stopped further away from the sealing bar. After wrapping, the product is sent though a conventional heat shrinkable tunnel that heat shrinks the film.
  • An objective of the invention is using a pusher plate to push the product from one dead plate through the curtain of film to another dead plate. Another objective of this invention is to use a conveyor to push the product through the curtain of film onto a transfer belt
  • Brief description of the drawings
    • Figure 1 shows wrapping with a single roll without print registration.
    • Figures 2 and 3 shows print registration using a pusher plate
    • Figure 4 shows pushing a product into a film curtain using a conveyor.
    Detailed description of the invention
  • Figures 2 and 3 show an upper roll film 10. The lower roll film is usually has a short waste heat shrinkable film that is sealed to the upper roll film. A pusher 11 pushes the product 12 resting on dead plate 13 through the curtain onto a dead plate 14 . The lower film is held in a substantially fixed position while the upper film wraps the product. Substantially fixed would allow a small amount of the film to move when the product is pushed. The preferred mode is to keep the film from moving. The sealing bar 8 seals and cuts the film so that a new curtain is created for the next product. Afterward the lower film roller pulls the film from the upper roll a few millimeters to allow for an unsealed sealed surface for cutting and sealing the next product on the dead plate. The lower film can be held stationary using pinch rollers. The position of upper roll film and the lower roll film can be interchanged.
  • To insure that the stroke of the pusher unwinds a predetermined length of film that coincides with the registration marks on the film, the length of the stroke is controlled by a sensor reading registration marks on the film. This is done by entering the length and width of the product in a computer. This will allow the computer to establish a minimum stroke which is smaller than the stroke needed from the pitch of the registration marks. When the machine is running a photo sensor reads the registration marks. If the registration mark is not read before the end of the stroke, the stroke of the pusher will be gradually increased until the registration mark coincides with the stroke of the pusher. If the registered mark is read before the end of the stroke, the stroke will be gradually decreased until the registration mark coincided with the stroke of the pusher. The stroke adjusts the position of the product with respect to the sealing bar thereby changing the length of the film used for wrapping. Tension of the film can be controlled by increasing the amount of film pulled by the lower waste film roller.
  • Figure 4 shows product 12 on a conveyor being pushed on to conveyor 15 through a curtain of film 16 onto transfer belt. Lower film roll 17 is held in a stationary position while upper film roll allows the film to wrap the product. The film from the lower film roll is held under a tension by a dancing bar. As the product moves onto the transfer conveyor the dancing bar moves to allow more slack so that the film from the lower roll moves under the product. After sealing, the dancing bar moves to its original position. During the wrapping the length of film from the lower roll does not have to change during wrapping
  • The photo sensor 9 reads a mark on the film that locates the position of the print registration. The sensing of the mark determines the where the product stops on the transfer belt before the sealing bar seals and cuts the curtain of film. If the sensor reading is to soon the product on the transfer belt will stops closer to the sealing bar. If the sensor reading is late, the product will stop further away from the sealing bar.

Claims (11)

  1. An apparatus for wrapping a product with a heat shrinkable film from a single roll and for maintaining print registration comprising:
    a first roll having heat shrinkable film,
    a second roll having a film,
    means for pushing the product into a curtain of film while wrapping the article by unwinding the film from the first film, while holding the film on the second roll in a substantially stationary position while wrapping the product from the film from the first roll,
    means for achieving print registration by adjusting the distance between the sealing bar and where the product stops before sealing and cutting the film,
    means for simultaneously cutting the film and sealing the film together on both sides of the cut thereby creating a film curtain,
    means for pulling the film from the first roller after cutting and sealing the film, and
    means for sensing a registration mark on the film.
  2. An apparatus according to claim 1 wherein the means for achieving print registration includes a pusher having a variable stroke that pushes the product resting on a dead plate through a film curtain onto another dead plate wherein the stroke of the pusher can vary the distance between the product and the seal bar before sealing.
  3. An apparatus according to claim 1 wherein the means for pushing the product from a conveyor through a film curtain includes a conveyor that pushes the product through the film curtain onto a transfer conveyor.
  4. An apparatus according to claim 3 wherein the means for achieving print registration includes means for varying the distance between the product on the transfer conveyor and the seal bar before sealing.
  5. An apparatus according to claim 5 wherein the film from the second roll has a dancing bar that allows the film from the second roll to move under the product to reduce the tension during the transfer of the product from the conveyor to the transfer conveyor.
  6. An apparatus according to claim 1 wherein the sensor means is a photo sensor.
  7. A process for wrapping a product with a heat shrinkable film from a single roll comprising:
    providing a first roll having heat shrinkable film,
    providing a second roll having a film,
    pushing the product into a curtain of film while wrapping the article by unwinding the film from the first film while holding the second roll of film in a substantially stationary position while wrapping the product from the film from the first roll,
    adjusting the distance between the sealing bar and where the product stops before sealing and cutting the film to achieving print registration,
    simultaneously cutting the film and sealing the film together on both sides of the cut thereby creating a film curtain,
    pulling the film from the first roller after cutting and sealing the film, and
    sensing registration marks on the film.
  8. A process according to claim 1 wherein the adjustment of the distance between the sealing bar and where the products stops before sealing and cutting the film includes pushing the product resting on a dead plate with a pusher having a variable stroke through a film curtain onto another dead plate wherein the stroke of the pusher establishes the distance between the product and the seal bar before sealing.
  9. A process according to claim 7 wherein the product is pushed by a conveyor through a film curtain onto a transfer conveyor.
  10. A process according to claim 7 including the steps of by entering the length and width of the product in a computer to establish a minimum stroke which is smaller than the stroke needed from the pitch of the registration marks.
  11. Apparatus for wrapping a product with a heat shrinkable film from a single roll comprising:
    a first roll having heat shrinkable film,
    a second roll having a film,
    means for pushing the product into a curtain of film while wrapping the article by unwinding the film from the first film while holding the film on the second roll in a substantially stationary position while wrapping the product from the film from the first roll,
    means for achieving print registration by using a pusher with a variable stroke that pushes the product resting on a dead plate through a film curtain onto another dead plate where the stroke of the pusher establishes the distance between the product and the seal bar before sealing,
    means for achieving print registration by adjusting the distance between the sealing bar and where the product stops before sealing and cutting the film,
    means for simultaneously cutting the film and sealing the film together on both sides of the cut thereby creating a film curtain,
    means for pulling the film from the first roller after cutting and sealing the film, and
    means for sensing a registration mark on the film.
EP14199505.0A 2014-12-19 2014-12-19 Film wrapping using a single roll Active EP3034417B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP14199505.0A EP3034417B1 (en) 2014-12-19 2014-12-19 Film wrapping using a single roll

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP14199505.0A EP3034417B1 (en) 2014-12-19 2014-12-19 Film wrapping using a single roll

Publications (2)

Publication Number Publication Date
EP3034417A1 true EP3034417A1 (en) 2016-06-22
EP3034417B1 EP3034417B1 (en) 2017-09-20

Family

ID=52146269

Family Applications (1)

Application Number Title Priority Date Filing Date
EP14199505.0A Active EP3034417B1 (en) 2014-12-19 2014-12-19 Film wrapping using a single roll

Country Status (1)

Country Link
EP (1) EP3034417B1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107284741A (en) * 2017-08-03 2017-10-24 广州叁立机械设备有限公司 A kind of three edge sealing machines
DE102017202759B3 (en) * 2017-02-21 2018-05-17 Heinrich Kuper Gmbh & Co. Kg Film-wrapping machine

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3564810A (en) * 1968-05-27 1971-02-23 Ollie B Wilson Jr Wrapping method and apparatus
GB1508126A (en) * 1974-04-30 1978-04-19 British Visqueen Ltd Packaging method
US4167841A (en) * 1976-06-02 1979-09-18 B.V. Machinefabrick "Verwachting" Foil packing apparatus and method
EP0160347A2 (en) * 1984-05-04 1985-11-06 Ab Tetra Pak A method and an arrangement for the application of film wrappings
EP0630811A1 (en) * 1993-05-17 1994-12-28 Tetra Laval Holdings & Finance SA Method and apparatus for shrink-film wrapper of one or more objects
EP0976656A1 (en) * 1998-07-29 2000-02-02 Tetra Laval Holdings & Finance SA Method of shrink film wrapping

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3564810A (en) * 1968-05-27 1971-02-23 Ollie B Wilson Jr Wrapping method and apparatus
GB1508126A (en) * 1974-04-30 1978-04-19 British Visqueen Ltd Packaging method
US4167841A (en) * 1976-06-02 1979-09-18 B.V. Machinefabrick "Verwachting" Foil packing apparatus and method
EP0160347A2 (en) * 1984-05-04 1985-11-06 Ab Tetra Pak A method and an arrangement for the application of film wrappings
EP0630811A1 (en) * 1993-05-17 1994-12-28 Tetra Laval Holdings & Finance SA Method and apparatus for shrink-film wrapper of one or more objects
EP0976656A1 (en) * 1998-07-29 2000-02-02 Tetra Laval Holdings & Finance SA Method of shrink film wrapping

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102017202759B3 (en) * 2017-02-21 2018-05-17 Heinrich Kuper Gmbh & Co. Kg Film-wrapping machine
CN107284741A (en) * 2017-08-03 2017-10-24 广州叁立机械设备有限公司 A kind of three edge sealing machines
CN107284741B (en) * 2017-08-03 2019-07-30 广州叁立机械设备有限公司 A kind of three edge sealing machines

Also Published As

Publication number Publication date
EP3034417B1 (en) 2017-09-20

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