Patent ID: 8221873
Filing Date: 2012-07-17
Classification: B26D,G03C,Y10T

Abstract:
1. A film slitter for slitting a wide film comprising a photosensitive emulsion layer oriented upwards into a film of a narrow form, said film slitter comprising: a lower rotary blade comprising a lower cutting edge; an upper rotary blade comprising an upper cutting edge, for shearing said wide film in cooperation with said lower cutting edge; and a motor for rotating said upper and lower rotary blades, wherein said upper and lower cutting edges are overlapped with one another partially, and contact one another in a position downstream in a running direction of said wide film, wherein a clearance is provided between said upper and lower cutting edges in a position upstream in said running direction, and wherein said motor rotates said upper and lower rotary blades such that said upper and lower cutting edges move in a direction from said position upstream to said position downstream at a position where said wide film is sheared, and that said wide film is nipped between said upper and lower rotary blades, and then said wide film is sheared by said upper and lower cutting edges.