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 device and method for printing and drying a plastic film web is provided, especially a device and method for printing and drying a polypropylene, polystyrene or polyethylene film web. The device can include several offset printing mechanisms for printing the film web with different ink applications and at least one flame drying station, characterized by a drawing roller, which is arranged between a last printing mechanism and the at least one flame drying station, and which can contact the unprinted surface of the film web, and apply tension to the film web.
Claims13
A device for printing and drying a polypropylene, polystyrene or polyethylene film web, the device 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, wherein the drawing roller acts on an unprinted surface of the film web and applies tension to the film web, so that a web tension in a flame drying area is reduced compared with a web tension in a printing area, wherein a cooling tunnel is arranged between the at least one flame drying station and a rear deflecting roller, wherein a cooling mechanism is arranged after the rear deflecting roller, and wherein the cooling mechanism comprises polytetrafluoroethylene-coated cooling rollers.
A method for printing and drying a polypropylene, polystyrene or polyethylene film web, the method comprising:
- printing the film web with different ink applications;
- subjecting the film web to flame drying on a printed side using at least one flame drying station;
- and
- applying tension to the film web on an unprinted side thereof after printing and before flame drying, so that a web tension in a flame drying area is reduced compared with a web tension in a printing area, wherein a cooling tunnel is arranged between the at least one flame drying station and a rear deflecting roller, wherein a cooling mechanism is arranged after the rear deflecting roller, and wherein the cooling mechanism comprises polytetrafluoroethylene-coated cooling rollers.
Dependencies are inferred from the claim text.