Patent ID: 8052146
Filing Date: 2011-11-08
Classification: B65H

Abstract:
1. A sheet transport apparatus comprising a suction device for sucking a sheet of paper on transport belts through suction holes formed on the transport belts, the suction device comprising: a plurality of suction boxes disposed along a sheet transport direction; a suction fan device; an inlet pipe having one end communicating with a suction side of the suction fan device and a plurality of air inlets branched on another end so as to communicate with the respective suction boxes; and an exhaust pipe having one end communicating with an exhaust side of the suction fan device and a plurality of air exhaust nozzles branched on another end so as to be opened above the respective suction boxes, air pressure detection sensors and air intake amount adjusting valves near the air inlets of the inlet pipe, air flow rate detection sensors and air exhaust amount adjusting valves near the air exhaust nozzles of the exhaust pipe, and a controller for controlling an opening of the air intake amount adjusting valve according to a detected value of the air pressure detection sensor, and an opening of the air exhaust amount adjusting valve according to a detected value of the air flow rate detection sensor, wherein air is jetted from the air exhaust nozzles to the sheet sucked on the transport belts.