Patent ID: 7950647
Filing Date: 2011-05-31
Classification: B21D,B26D,B26F,G03G,Y10T

Abstract:
1. A sheet finishing apparatus comprising: a punching blade that forms a punch hole in a sheet supplied from an image forming apparatus; a drive mechanism which drives the punching blade between a penetrate position where the punch hole is formed in the sheet and a standby position separate from the sheet; a punch motor that rotates in a forward direction and a reverse direction and drives the drive mechanism; a detection section that rotates together with the punch motor and detects a position of the punching blade; a drive control section that controls the punch motor using position information of the punching blade detected by the detection section and stops the punching blade at the standby position; and a correction control section that measures a first load of the punch motor at the rotation in the forward direction and a second load of the punch motor at the rotation in the reverse direction before the sheet is supplied from the image forming apparatus, and corrects a drive amount of the punch motor after the sheet is supplied from the image forming apparatus according to the first load and the second load.