Patent ID: 7007577
Filing Date: 2006-03-07
Classification: B26D,B26F,Y10T

Abstract:
1. A sheet processing apparatus for processing a sheet from an image forming apparatus, comprising: a conveyer that conveys the sheet having a side edge extending in a conveying direction of the sheet; a sheet processor that processes the sheet, said sheet processor being movable in a width direction, which is perpendicular to the conveying direction; a first detector that detects the side edge of the sheet, said first detector being movable in the width direction together with said sheet processor; a first moving device that moves said sheet processor and said first detector in the width direction; a second detector that detects a leading edge of the sheet, said second detector being provided upstream of said sheet processor in the conveying direction; a third detector that detects a conveying amount by said conveyer after said second detector detects the leading edge of the sheet; and a controller that controls said first moving device to move said sheet processor and said first detector in predetermined timing and to stop said sheet processor and said first detector from moving in the width direction in response to said first detector detecting the side edge of the sheet, wherein said controller controls the predetermined timing in accordance with the conveying amount detected by said third detector and data of a sheet length in the conveying direction received from the image forming apparatus.