Patent ID: 7090743

Claim:
A pressure lamination apparatus comprising: a housing; a pressure box mounted on the housing, the pressure box comprising upper and lower confronting sections defining a lamination section having an inlet end and an outlet end and opposite sides, each of said upper and lower sections including a peripheral frame extending along said inlet end, outlet end and sides; counter-rotating upper and lower drive belts rotatably mounted on the housing so as to engage each other while passing from the inlet end to the outlet end through said lamination section; a fluid pressure generator for supplying fluid pressure to the upper and lower sections of the pressure box for compressing the drive belts together in the pressure box, and pressure seals between said upper and lower sections along said inlet end, outlet end and sides and between which said drive belts are adapted to slide, said pressure seals including a low friction surface along the frame of one of said upper and lower sections and a low friction flexible sheet having inner and outer surfaces on the frame of the other of said upper and lower sections, said flexible sheet defining a chamber along said frame of the other section, and an inflatable bladder in said chamber in engagement with said inner surface and adapted on inflation to flex said flexible sheet toward said low friction surface to seal said drive belts therebetween.