Transfer apparatus, image forming apparatus, and method of correcting moving speed of belt
AssigneeRicoh Company, Ltd.
InventorHiroyuki Kuroda
Life of this patent
Estimating the term…
Abstract
A scale is provided along at least one side of a portion of the belt. A sensor reads the scale on the belt to obtain scale information. An actual speed calculating unit calculates a speed of the belt from the scale information. A speed calculating unit calculates a speed of the belt from information other than the scale information. A control unit that provides a control to correct speed of the belt according to the speed calculated by the actual speed calculating unit when the speed calculated by the actual speed calculating unit is normal, and provides a control to correct speed of the belt according to the speed calculated by the speed calculating unit when the speed calculated by the actual speed calculating unit is abnormal.
Claims1
A belt speed controller comprising:
- a belt that rotates;
- a sensor that reads a scale provided in an internal circumference or in an outer circumference of the belt;
- a direct speed detector that directly detects a speed of the belt;
- an indirect speed detector that indirectly detects the speed of the belt;
- and
- a control unit that adjustably controls the speed of the belt based on the speeds of the belt which are detected by the direct or indirect speed detectors.
Dependencies are inferred from the claim text.