Device and method for printing and drying plastic films
AssigneeRPC BEBO PRINT PATENT GmbH
InventorVolker Engelmann
Life of this patent
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Abstract
A method and a device for printing and drying a plastic film web, especially a polypropylene (PP), polystyrene (PS), or polyethylene (PE) film web, employ several offset printing mechanisms for printing the film web with different ink applications and at least one flame drying station. The device also includes a drawing roller, which is arranged between a last printing mechanism and the at least one flame drying station, contacts the unprinted surface of the film web, and applies tension to the film web.
Claims18
A device for printing and drying a plastic film web, comprising a plurality of offset printing mechanisms for printing the film web with different ink applications, at least one flame drying station for flame drying a printed side of the film web, and a drawing roller arranged between a last printing mechanism and the at least one flame drying station,
- the drawing roller being configured to act on an unprinted surface of the film web and applies tension to the film web, so that the web tension in the flame drying area is reduced compared with the web tension in a printing area,
- wherein the drawing roller is a driven vacuum roller provided with a plurality of openings formed on its lateral surface and is set up to apply negative pressure to the film web through the openings.
A method for printing and drying a plastic film web, the method comprising:
- providing a plurality of offset printing mechanisms for printing the film web with different ink applications;
- providing at least one flame drying station for subjecting the film web to flame drying on a printed side;
- providing a drawing roller for applying tension to the film web on an unprinted side after printing and before flame drying, so that web tension in the flame drying area is reduced compared with web tension in a printing area,
- wherein the drawing roller is a driven vacuum roller provided with a plurality of openings formed on its lateral surface and is set up to apply negative pressure to the film web through the openings.
Dependencies are inferred from the claim text.