Patent ID: 7942087
Filing Date: 2011-05-17
Classification: G03G,Y10T

Abstract:
1. A sheet punching apparatus comprising: a punch portion moving in a direction perpendicular to a moving direction of a sheet; a bracket having an elastic member to move in conjunction with the punch portion; a sheet side end sensing means fixed to a predetermined position of the bracket, sensing the side end of the sheet in accordance with movement of the bracket; and a sheet rear end sensing means opened to sense the rear end of the moving sheet when the bracket moves at a predetermined distance along with the punch portion to sense the side end of the sheet, wherein the punch portion works to punch the sheet at a predetermined position after the rear end of the sheet is sensed by the sheet rear end sensing means, and wherein the elastic member and the bracket are inserted into a slide rod provided on a sheet guide and are slid along the moving direction of the punch portion, the bracket being pushed by the elastic member to be closely fixed to a projection of the punch portion.