Segmented compliant platen for film sealing on ink jet cartridges

Abstract

A segmented platen for heat-sealing a film material to a non-planar surface of an ink jet printer cartridge includes a heat-transferring housing having sidewalls defining an internal cavity and a first aperture. Heat-transferring segments, which partially protrude through the first aperture of the housing, are operable to independently move in relation to the housing and each other in a direction substantially parallel to the sidewalls of the housing. Biasing devices, corresponding in number to the segments, independently urge the segments through the first aperture of the housing, thereby urging the segments to follow any curvature in the non-planar surface of the ink jet printer cartridge. The platen further includes a heating element for generating and transferring heat into the housing. The segments receive the heat from the housing, and transfer the heat into the underlying film. Each of the segments of the platen has high thermal conductivity, thereby transferring heat into the film material at a rate much higher than may be attained using compliant rubber platens. The independent movement and downward pressure of the segments upon the film provides efficient heat transfer into the film without deforming high spots in the non-planar surface of the ink jet cartridge.