Patent ID: 7021081
Filing Date: 2006-04-04
Classification: C01B

Abstract:
1. A method of extruding individual polyhedron shaped slabs of dry ice from a source of liquid CO 2 , said method comprising the steps of: blocking a substantially rectangular shaped extruding slot in a die at an end of a cylinder of a dry ice extruding machine; injecting said liquid CO degassing said cylinder to remove gaseous CO building a puck in said end of said cylinder having said extruding slot in said die by moving a pressure piston back and forth in said cylinder of said dry ice extruding machine during said injecting; unblocking said extruding slot to allow dry ice to be extruded therethrough in the form of a continuous polyhedron shaped slab disposed outside of said cylinder; breaking, outside of said cylinder, said extruded continuous slab of dry ice upon the length thereof reaching a predetermined distance to provide an individual slab of dry ice; and repeating said breaking step to create as many of said individual slabs of dry ice as desired, wherein at the outer end of said extruding slot a forming chamber with a substantially rectangular shaped forming slot therein for receiving said slab of extruded dry ice therethrough, said forming slot allowing said slab of extruded dry ice to set before said breaking step, and wherein a sizing mechanism moving a sizing block adjacent and outside of said cylinder and said forming chamber for said breaking of said extruded dry ice in said predetermined length.