Patent ID: 9335700
Filing Date: 2016-05-10
CPC Classification: G03G

Claim Text:
1. A belt transport apparatus comprising: a driving roller that drives a belt; a first detection unit that directly detects a surface speed of the belt; a second detection unit that detects a rotational speed of the driving roller; a first computation unit configured to compute a first deviation between the belt surface speed detected by the first detection unit and a target speed of the belt; a position controller configured to compute a speed correction value based on the first deviation computed by the first computation unit; a speed deviation ratio computation unit configured to compute a ratio of the belt surface speed detected by the first detection unit and the rotational speed of the driving roller detected by the second detection unit; a storage unit that stores the ratio computed by the speed deviation ratio computation unit; a second computation unit configured to compute, according to predetermined conditions, one of a control unit configured to control the rotational speed of the driving roller based on the one of the second deviation and the third deviation computed by the second computation unit.