Patent ID: 6038969
Filing Date: 2000-03-21
Classification: B41F,B41N

Abstract:
A tensioning frame for a metal foil or synthetic resin film having mounting perforations adjacent its margin, said tensioning frame comprisinga frame member having a plurality of sides;at least one tensioning bar extending along a respective side of said frame member, each of said at least one tensioning bar being pivotably mounted on its respective side of said frame member and carrying a plurality of holding pins which engage in mounting perforations of a foil or film to be tensioned;a fulcrum strip that extends along an outward side of each of said at least one tensioning bar relative to the frame member, each of the at least one tensioning bar being pivotable against the fulcrum strip;an elastically deformable inflatable tensioning tube disposed alongside each of said at least one tensioning bar adjacent an inward side thereof relative to said frame member; anda pressure fluid source in fluid communication with each tensioning tube;each said tensioning tube being inflatable by said pressure fluid source to expand the tensioning tube against the adjacent at least one tensioning bar and pivot the at least one tensioning bar in an outward direction relative to said frame member, whereby a foil or film having its mounting perforations engaged on the holding pins of the at least one tensioning bar will be tensioned.