Feeding device and sheet processing device with the same

Abstract

A feeding device includes a suction feeding unit having a belt for feeding a sheet in a suction state and a belt driving unit, a sheet detection sensor, and a control unit. The control unit controls the belt drive unit so as to feed the sheet in a feeding direction at a first speed. If the sheet does not arrive at the sheet detection sensor, the control unit controls the belt drive unit so as to execute a low-speed feeding of moving the belt in the feeding direction at a second speed lower than the first speed or so as to execute a reverse feeding of moving the belt in a reverse feeding direction opposite to the feeding direction.

What is claimed is: 
     
         1 . A feeding device comprising:
 a suction feeding unit having a belt for feeding a sheet on a feeding table along a feeding path in a suction state, and a belt drive unit for moving said belt;   a skew detection sensor that is provided in said feeding path in a downstream of said suction feeding unit and detects presence or absence of a skewed state of said sheet; and   a control unit for controlling said belt drive unit,   wherein said control unit controls said belt drive unit so as to execute a first operation of moving said belt in a feeding direction at a first speed by a belt feeding amount capable of feeding said sheet from said feeding table to said skew detection sensor, and   wherein said control unit, if the skewed state of said sheet is detected by said skew detection sensor, controls said belt drive unit so as to execute a reverse feeding of moving said belt in a reverse feeding direction opposite to said feeding direction by a belt reverse feeding amount capable of feeding said sheet detected as being in the skewed state up to said feeding table.   
     
     
         2 . The feeding device according to  claim 1 ,
 wherein said control unit controls said belt drive unit so as to repeat said first operation after executing said reverse feeding or so as to repeat a second operation of moving said belt in said feeding direction at a second speed lower than said first speed after executing said reverse feeding.