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US 2003/0192285 A1Published application
Package film tension adjusting device of packaging machine
AssigneeNone recorded
InventorBenker P.C. Liao
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AssigneeNone recorded
InventorBenker P.C. Liao
Estimating the term…
A packaging machine includes a supply of a package film and a wrapping/sealing section into which products to be packaged are conveyed. A package film tension adjusting device is arranged between the supply of the package film and the wrapping/sealing section for routing the package film to the wrapping/sealing section and for adjusting the tension of the package film supplied to the wrapping/sealing section. The package film tension adjusting device includes a chassis inside which two rails are fixed. Two slide blocks are movably supported on the rails and are movable toward/away from the wrapping/sealing section along the rails. A conveyor is supported on the slide blocks for conveying the products into the wrapping/sealing section. Film routing members are attached to the conveyor for routing the package film toward the wrapping/sealing section. Moving the slide blocks along the rails causes the distance between the film routing members and the wrapping/sealing section to be changed thereby changing the tension of the package film supplied from the film routing members to the wrapping/sealing section in a stepless manner. A locker unit is mounted to at least one of the slide blocks for releasably securing the slide block at a desired position along the rails. A screw rod threadingly engages the slide blocks for moving the slide blocks along the rails.
A package film tension adjusting device adapted to be mounted between a supply of a package film and a wrapping/sealing section of a packaging machine, the package film tension adjusting device comprising rails on which slide blocks are movably supported for being movable relative to the wrapping/sealing section and thus changing distance therebetween, film routing means being mounted on the slide blocks to be movable therewith, the package film being fed into the wrapping/sealing section by the film routing means whereby moving the slide blocks along the rails changes the distance between the film routing means and the wrapping/sealing section and thus tension of the package film supplied from the film routing means to the wrapping/sealing section.
Dependencies are inferred from the claim text.
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Supplying or feeding container-forming sheets or wrapping material: feeding webs from rolls
Machines, apparatus or devices for, or methods of, packaging articles or materials
Term end not estimated
1. Field of the Invention
The present invention relates generally to a packaging machine, and in particular to a device for adjusting the tension of a package film supplied into the packaging machine for packaging a product.
2. The Related Art
The present invention will be apparent to those skilled in the art by reading the following description of preferred embodiments thereof, with reference to the attached drawings, in which:
FIG. 1 is a perspective view of a packaging machine in which a package film tension adjusting device constructed in accordance with a first embodiment of the present invention is incorporated;
FIG. 2 is a perspective view of the package film tension adjusting device of the present invention;
With reference to the drawings and in particular to FIG. 1, a packaging machine, generally designated with reference numeral 200, comprises a film supply section 210 from which a package film A in the form of a roll is continuously supplied and a wrapping/sealing section 220 inside which a product B is wrapped with the package film A. A package film tension adjusting device constructed in accordance with a first embodiment of the present invention, generally designated with reference numeral 100, is arranged between the film supply section 210 and the wrapping/sealing section 220.
In the embodiment illustrated, the film supply section 210 has a first longitudinal direction along which the film A is forwarded. The wrapping/tensioning section 220 has a second longitudinal direction along which the product B is conveyed. The first and second longitudinal directions are arranged to be substantially normal to each other. However, it is understood that the first and second longitudinal directions can be arranged in different way.
The package film tension adjusting device 100 comprises a chassis 10 inside which two spaced rails 20 are fixed. The rails 20 can be of any known type and are cylindrical rods in the embodiment illustrated. Two slide blocks 30 are movably supported on the rails 20 by bearing means 31 whereby the slide blocks 30 are movable along the rails 20. Stops 40 are arranged on opposite ends of the rails 20 for limiting the movement of the slide blocks 30 along the rails 20.