Patent ID: 7171885

Claim:
An apparatus for die cutting laminar material comprising: a cutting die support cylinder having a cylindrical outer surface, said cutting die support cylinder having a two 180Â° halves; a cutting die having a curved shape, said cutting die having a curved inner surface conforming to said cylindrical outer surface of said cutting die support cylinder, said cutting die having a plurality of holes formed therein so as to extend from said curved inner surface to an exterior surface of said cutting die; a fixing means for securing said cutting die to said cutting die support cylinder, said fixing means comprising: a bolt having a shank and a head, said head having a larger area than an area of a cross-section of said shank in parallel relation to said head; and a working means housed within a hollow body affixed to said cutting die support cylinder, said working means operatively connected to said bolt for moving said bolt from a retracted position to an extended position, said head of said bolt extending outwardly of said cutting die support cylinder through one of said plurality of holes of said cutting die when in said extended position, said working means being a dynamic fluid cylinder, said head of said bolt being secured to said cutting die when in said extended position, said working means comprising a plurality of fluid dynamic cylinders each acting independently of each other in said two 180Â° halves, each of said plurality of fluid dynamic cylinders having a spring cooperative with said bolt such that said bolt remains in said retracted position when said bolt is obstructed from moving to the extended position.