Patent ID: 8070151

Claim:
A sheet processing apparatus adapted for processing a plurality of sheets, comprising: a sheet-table unit for holding the sheets; a sheet-separating unit disposed at a downstream end of the sheet-table unit along a convey direction of the sheets, for separating the sheets one by one and feeding the sheets downstream; a convey unit arranged at a downstream end of the sheet-separating unit along the convey direction of the sheets, for feeding the sheets downstream stably; a discharge unit located at a downstream end of the convey unit along the convey direction of the sheets, for discharging the sheets; a sheet processing unit placed between the convey unit and the discharge unit, and close to a convey path of the sheets, for processing the sheets; a speed sensor arranged at an upstream end of the sheet-separating unit, and close to the convey path, the speed sensor capable of detecting the leaving time of each sheet therefrom, and sending corresponding signal to a system controller which controls the sheet-separating unit to stop and start feeding the sheets, for forming a sheet interval between the two adjacent sheets on the convey path; and an edge sensor located between the sheet-separating unit and the sheet processing unit, the edge sensor capable of detecting a front edge and a rear edge of each sheet passing therethrough, and sending corresponding control signals to the system controller which delays a predetermined time according to the received signals from the edge sensor to control the sheet processing unit to start and stop processing each sheet which is moving on the convey path at an even speed.