GB2028223A - A device for welding and cutting a strip of plastics film. - Google Patents

A device for welding and cutting a strip of plastics film. Download PDF

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Publication number
GB2028223A
GB2028223A GB7924667A GB7924667A GB2028223A GB 2028223 A GB2028223 A GB 2028223A GB 7924667 A GB7924667 A GB 7924667A GB 7924667 A GB7924667 A GB 7924667A GB 2028223 A GB2028223 A GB 2028223A
Authority
GB
United Kingdom
Prior art keywords
lever
article
strip
welding
foil
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
GB7924667A
Other versions
GB2028223B (en
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.)
Keller GmbH
Original Assignee
Keller GmbH
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 Keller GmbH filed Critical Keller GmbH
Publication of GB2028223A publication Critical patent/GB2028223A/en
Application granted granted Critical
Publication of GB2028223B publication Critical patent/GB2028223B/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/74—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by welding and severing, or by joining and severing, the severing being performed in the area to be joined, next to the area to be joined, in the joint area or next to the joint area
    • B29C65/745—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by welding and severing, or by joining and severing, the severing being performed in the area to be joined, next to the area to be joined, in the joint area or next to the joint area using a single unit having both a severing tool and a welding tool
    • B29C65/7451—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by welding and severing, or by joining and severing, the severing being performed in the area to be joined, next to the area to be joined, in the joint area or next to the joint area using a single unit having both a severing tool and a welding tool the severing tool and the welding tool being movable with respect to one-another
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/18—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
    • B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
    • B29C66/43—Joining a relatively small portion of the surface of said articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
    • B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
    • B29C66/43—Joining a relatively small portion of the surface of said articles
    • B29C66/431—Joining the articles to themselves
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/82—Pressure application arrangements, e.g. transmission or actuating mechanisms for joining tools or clamps
    • B29C66/822—Transmission mechanisms
    • B29C66/8221—Scissor or lever mechanisms, i.e. involving a pivot point
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/82—Pressure application arrangements, e.g. transmission or actuating mechanisms for joining tools or clamps
    • B29C66/822—Transmission mechanisms
    • B29C66/8227—Transmission mechanisms using springs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/82—Pressure application arrangements, e.g. transmission or actuating mechanisms for joining tools or clamps
    • B29C66/824—Actuating mechanisms
    • B29C66/8242—Pneumatic or hydraulic drives
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
    • B29C66/832—Reciprocating joining or pressing tools
    • B29C66/8324—Joining or pressing tools pivoting around one axis
    • 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
    • B65B51/14—Applying or generating heat or pressure or combinations thereof by reciprocating or oscillating 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
    • B65B61/00—Auxiliary devices, not otherwise provided for, for operating on sheets, blanks, webs, binding material, containers or packages
    • B65B61/005—Auxiliary devices, not otherwise provided for, for operating on sheets, blanks, webs, binding material, containers or packages for removing material by cutting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
    • B29C66/112—Single lapped joints
    • B29C66/1122—Single lap to lap joints, i.e. overlap joints

Abstract

The device (1) comprises a rotatable support means for supporting an article 16 to be wrapped and film applying means (2) movable relative to the article. A first lever (9) carries a welding head (8) which is movable between an operative and an inoperative condition by piston and cylinder means (10). A cutting member (12) carried by a second lever (13) is mounted on the first lever (9) and is movable by associated piston and cylinder means (14) towards and away from a cutting position to cut the film intermediate the welding head (8) and film applying means (2). <IMAGE>

Description

SPECIFICATION A device for welding and cutting a strip of plastics foil The present invention relates to a device for welding and cutting a strip of plastics foil.
The invention provides in or for apparatus for wrapping an article comprising rotatable support means for supporting and rotating an article to be wrapped and means for applying a strip of plastics foil to the article when it is being rotated such that said strip is helically wound on to the article, a device for welding and cutting the strip, said device comprising a welding head mounted at one end of a first lever, piston and cylinder means for moving the welding head by said first lever between an operative and an inoperative condition, and a cutting member carried by a second lever which is pivotally connected to said first lever.
In order that the invention may be well understood an embodiment thereof will now be described, by way of example only, with reference to the accompanying drawings in which: Figure 1 is a view in elevation of a device for welding and cutting a strip of plastics foil; and Figure 2 is a plan view of the device of Figure 1.
The device for welding and cutting a strip of plastics foil is generally designated by the reference numeral 1. Means for applying a plastics foil comprises a carriage 2 which is movable in a support (not shown) parallel to a vertical axis of rotation of a support or table means supporting the article to be wrapped. The carriage contains a roll of plastics foil 3 suitably mounted such that it may be fed via a roller 4 and retaining jaws 5 to the article 6 to be wrapped. The article 6 is supported on a table means which is rotatable in the direction of the arrow 7 about a vertical axis to permit a relatively thin strip of plastics foil to be wound in a helical path around the article as the carriage 2 moves vertically relative to the article 6.
Awelding head formed as a bar 8 is connected to one end of an angled first lever 9. The other end of the first lever 9 is pivotally connected to the carriage 2. Piston and cylinder means 10 is mounted on the carriage 2 with the free end of the piston connected to an angle of the first lever 9 such that reciprocation of the piston causes the first lever 9 to rotate backwards and forwards in the directions of the arrow 11 thereby moving the welding bar 8 between an operative and an inoperative condition.
The cutting member is a serrated blade 12 which is fixed to a second lever 13 which is in turn pivotally connected to the first lever 9. The blade 12 is movable towards and away from a cutting position by associated piston and cylinder means 14. The cylinder is mounted on the first lever 9 and the free end of the piston is connected to the second or cutting member lever 13.
A pressure roller 15 is mounted on a lever 17 which is pivotally connected to the angled first lever 9 behind the welding bar 8 such that the roller 15 is biased by spring 17 into contact with the strip of plastics foil so as to press it against the article to be wrapped between the welding bar 8 and the cutting member 12 when the welding bar is in an operative condition. Means are provided to cause the retaining jaws 5 to clamp the strip of plastics foil when the pressure roller 15 is brought into contact with the foil against the article 6 in order to hold the foil 3 taut between the roller 15 and retaining jaws 5 so that the blade 12 may cut cleanly through the foil 3 at an intermediate location.
When the wrapping of an article 6 has been completed the piston and cylinder means 10 are actuated to rotate the angled first lever 9 to bring the welding bar 8 into an operative condition pressing the last layer of foil 3 against a previous layer to which it is to be welded. The pressure roller 15 holds the foil 3 firmly against the article causing the retaining jaws 5 to preventfurtherfoil being suplied.
The piston and cylinder means 14 may then be actuated to cause the cutting member 12 to cut the foil. When the weld is complete the piston and cylinder means 10 move the welding bar 8 into an inoperative condition.
The pressure which the welding bar 8 applies to the foils to be welded together may be preset by varying the stroke of the piston thereby ensuring that a satisfactory weld without holes is achieved.
Since the above described device may be operated automatically it has numerous advantages over hand operated devices. In particular the abovedescribed device maintains a consistent weld quality thus ensuring airtightness and durability of the finished package.
1. In orforapparatusforwrapping an article comprising rotatable support means for supporting and rotating an article to be wrapped and means for applying a strip of plastics foil to the article when it is being rotated such that said strip is helically wound on to the article, a device for welding and cutting the strip, said device comprising a welding head mounted at one end of a first lever, piston and cylinder means for moving the welding head by said first lever between an operative and an inoperative condition, and a cutting member carried by a second lever which is pivotally connected to said first lever.
2. A device as claimed in claim 1, further comprising a spring biased pressure roller adapted to press the strip of plastics foil to an article to be wrapped when the welding head is in an operative condition in use.
3. A device as claimed in claim 1 or 2, wherein said cutting member is movable towards and away from a cutting position by an associated piston and cylinder means.
4. Apparatus for wrapping an article comprising a device as claimed in any one of the precedidng claims wherein one end of said first lever is pivotally connected to, and said piston and cylinder means for moving the welding head is mounted on a carriage of the foil applying means, said carriage being movable parallel to the axis of rotation of the support means.
5. A device for welding and cutting a strip of
**WARNING** end of DESC field may overlap start of CLMS **.

Claims (5)

**WARNING** start of CLMS field may overlap end of DESC **. SPECIFICATION A device for welding and cutting a strip of plastics foil The present invention relates to a device for welding and cutting a strip of plastics foil. The invention provides in or for apparatus for wrapping an article comprising rotatable support means for supporting and rotating an article to be wrapped and means for applying a strip of plastics foil to the article when it is being rotated such that said strip is helically wound on to the article, a device for welding and cutting the strip, said device comprising a welding head mounted at one end of a first lever, piston and cylinder means for moving the welding head by said first lever between an operative and an inoperative condition, and a cutting member carried by a second lever which is pivotally connected to said first lever. In order that the invention may be well understood an embodiment thereof will now be described, by way of example only, with reference to the accompanying drawings in which: Figure 1 is a view in elevation of a device for welding and cutting a strip of plastics foil; and Figure 2 is a plan view of the device of Figure 1. The device for welding and cutting a strip of plastics foil is generally designated by the reference numeral 1. Means for applying a plastics foil comprises a carriage 2 which is movable in a support (not shown) parallel to a vertical axis of rotation of a support or table means supporting the article to be wrapped. The carriage contains a roll of plastics foil 3 suitably mounted such that it may be fed via a roller 4 and retaining jaws 5 to the article 6 to be wrapped. The article 6 is supported on a table means which is rotatable in the direction of the arrow 7 about a vertical axis to permit a relatively thin strip of plastics foil to be wound in a helical path around the article as the carriage 2 moves vertically relative to the article 6. Awelding head formed as a bar 8 is connected to one end of an angled first lever 9. The other end of the first lever 9 is pivotally connected to the carriage 2. Piston and cylinder means 10 is mounted on the carriage 2 with the free end of the piston connected to an angle of the first lever 9 such that reciprocation of the piston causes the first lever 9 to rotate backwards and forwards in the directions of the arrow 11 thereby moving the welding bar 8 between an operative and an inoperative condition. The cutting member is a serrated blade 12 which is fixed to a second lever 13 which is in turn pivotally connected to the first lever 9. The blade 12 is movable towards and away from a cutting position by associated piston and cylinder means 14. The cylinder is mounted on the first lever 9 and the free end of the piston is connected to the second or cutting member lever 13. A pressure roller 15 is mounted on a lever 17 which is pivotally connected to the angled first lever 9 behind the welding bar 8 such that the roller 15 is biased by spring 17 into contact with the strip of plastics foil so as to press it against the article to be wrapped between the welding bar 8 and the cutting member 12 when the welding bar is in an operative condition. Means are provided to cause the retaining jaws 5 to clamp the strip of plastics foil when the pressure roller 15 is brought into contact with the foil against the article 6 in order to hold the foil 3 taut between the roller 15 and retaining jaws 5 so that the blade 12 may cut cleanly through the foil 3 at an intermediate location. When the wrapping of an article 6 has been completed the piston and cylinder means 10 are actuated to rotate the angled first lever 9 to bring the welding bar 8 into an operative condition pressing the last layer of foil 3 against a previous layer to which it is to be welded. The pressure roller 15 holds the foil 3 firmly against the article causing the retaining jaws 5 to preventfurtherfoil being suplied. The piston and cylinder means 14 may then be actuated to cause the cutting member 12 to cut the foil. When the weld is complete the piston and cylinder means 10 move the welding bar 8 into an inoperative condition. The pressure which the welding bar 8 applies to the foils to be welded together may be preset by varying the stroke of the piston thereby ensuring that a satisfactory weld without holes is achieved. Since the above described device may be operated automatically it has numerous advantages over hand operated devices. In particular the abovedescribed device maintains a consistent weld quality thus ensuring airtightness and durability of the finished package. CLAIMS
1. In orforapparatusforwrapping an article comprising rotatable support means for supporting and rotating an article to be wrapped and means for applying a strip of plastics foil to the article when it is being rotated such that said strip is helically wound on to the article, a device for welding and cutting the strip, said device comprising a welding head mounted at one end of a first lever, piston and cylinder means for moving the welding head by said first lever between an operative and an inoperative condition, and a cutting member carried by a second lever which is pivotally connected to said first lever.
2. A device as claimed in claim 1, further comprising a spring biased pressure roller adapted to press the strip of plastics foil to an article to be wrapped when the welding head is in an operative condition in use.
3. A device as claimed in claim 1 or 2, wherein said cutting member is movable towards and away from a cutting position by an associated piston and cylinder means.
4. Apparatus for wrapping an article comprising a device as claimed in any one of the precedidng claims wherein one end of said first lever is pivotally connected to, and said piston and cylinder means for moving the welding head is mounted on a carriage of the foil applying means, said carriage being movable parallel to the axis of rotation of the support means.
5. A device for welding and cutting a strip of plastics foil substantially as herein described with reference to the accompanying drawings.
GB7924667A 1978-08-21 1979-07-16 Device for welding and cutting a strip of plastics film Expired GB2028223B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2836590A DE2836590C2 (en) 1978-08-21 1978-08-21 Welding and cutting device for welding and cutting a plastic film

Publications (2)

Publication Number Publication Date
GB2028223A true GB2028223A (en) 1980-03-05
GB2028223B GB2028223B (en) 1982-06-30

Family

ID=6047594

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7924667A Expired GB2028223B (en) 1978-08-21 1979-07-16 Device for welding and cutting a strip of plastics film

Country Status (4)

Country Link
DE (1) DE2836590C2 (en)
FR (1) FR2434021A1 (en)
GB (1) GB2028223B (en)
IT (1) IT1121396B (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2224462A (en) * 1988-10-18 1990-05-09 Leonard John Dawkin Sealing and cutting device
CN106142545A (en) * 2016-07-29 2016-11-23 天津市旭辉恒远塑料包装股份有限公司 A kind of electric cutting device
CN117342081A (en) * 2023-12-04 2024-01-05 新启航包装科技(泰州)有限公司 Plastic package sealing device

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE432916B (en) * 1980-01-08 1984-04-30 Karl Johan Back PROCEDURE AND DEVICE FOR DRAFT FILM PACKAGING
DK669288A (en) * 1987-12-01 1989-06-02 Automated Packaging Syst Inc APPARATUS AND PROCEDURE FOR FILLING BAGS
DE4236760C2 (en) * 1992-10-30 1996-08-22 Erapa Ceka Maschbau Device for the automatic cutting of adhesive tape wound on winding material
EP1415913A1 (en) * 2002-10-30 2004-05-06 Dnc, S.A. Machine and method for wrapping a plastic film around pallets

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2184212A5 (en) * 1972-05-12 1973-12-21 Iwatani & Co
US3867806A (en) * 1973-04-04 1975-02-25 Lantech Inc Process of making a stretched-wrapped package
DE2450373A1 (en) * 1974-10-23 1976-04-29 Bauer Eberhard MACHINE FOR COVERING ITEMS WITH PLASTIC FILM
CA1064380A (en) * 1976-05-28 1979-10-16 William G. Lancaster Automatic wrapping apparatus

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2224462A (en) * 1988-10-18 1990-05-09 Leonard John Dawkin Sealing and cutting device
GB2224462B (en) * 1988-10-18 1993-01-13 Leonard John Dawkin Improvements in garment protection
CN106142545A (en) * 2016-07-29 2016-11-23 天津市旭辉恒远塑料包装股份有限公司 A kind of electric cutting device
CN106142545B (en) * 2016-07-29 2018-09-28 天津市旭辉恒远塑料包装股份有限公司 A kind of electric cutting device
CN117342081A (en) * 2023-12-04 2024-01-05 新启航包装科技(泰州)有限公司 Plastic package sealing device
CN117342081B (en) * 2023-12-04 2024-02-02 新启航包装科技(泰州)有限公司 Plastic package sealing device

Also Published As

Publication number Publication date
IT1121396B (en) 1986-04-02
FR2434021A1 (en) 1980-03-21
GB2028223B (en) 1982-06-30
DE2836590C2 (en) 1980-07-10
DE2836590B1 (en) 1979-10-31
IT7923574A0 (en) 1979-06-14

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PCNP Patent ceased through non-payment of renewal fee