Patent ID: 6672504
Filing Date: 2004-01-06
Classification: B26D,B26F,G03G,Y10T

Abstract:
A sheet punching device for cutting holes in a sheet while punches are entering die holes, said sheet punching device comprising:two punch trains, each of which includes a plurality of said punches axially aligned on a rotary shaft and projecting in a radial direction of said shaft, wherein said two punch trains are disposed in a rotation direction of said shaft relative to one another, and said die holes are disposed in correspondence with said plurality of punches, wherein said two punch trains are disposed on said shaft at an angle of approximately 180Â° with respect to each other in the rotation direction, wherein a number of said plurality of punches in one punch train of said two punch trains is two, and wherein a number of said plurality of punches in the other punch train of said two punch trains is three; and means for selecting only one of said two punch trains to cut holes in the sheet.