Patent ID: 6783124
Filing Date: 2004-08-31
Classification: B26D,B65H,Y10T

Abstract:
A sheet finisher comprising:conveying means for conveying a sheet; punching means for punching the sheet being conveyed by said conveying means; sheet edge sensing means for detecting a horizontal shift of the sheet by sensing an edge parallel to a direction of sheet conveyance of the sheet, being conveyed by said conveying means; first drive means for moving said sheet edge sensing means in a direction perpendicular to the direction of sheet conveyance; second drive means for moving said punching means in the direction perpendicular to the direction of sheet conveyance such that a position of said punching means is adjusted in accordance with a horizontal shift of the sheet calculated based on the detected horizontal shift of the sheet detected by said sheet edge sensing means; and control means for controlling said first drive means and said second drive means by a preselected pulse ratio.