Drive control device and image forming apparatus including the same
US6842602B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 24, 2003 |
| Grant date | Jan 11, 2005 |
| Priority date | — |
| Expiry date | Mar 24, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G15/757
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A device for controlling the drive of an endless movable member of the present invention includes a mark sensor responsive to a plurality of marks continuously positioned on the movable member at preselected intervals in the direction of movement of the movable member. A speed/position controller controls either one of speed and position by using the output of the mark sensor. A discontinuity sensing circuit determines whether or not a discontinuous portion in which a distance between nearby marks does not lie in a preselected range is present in a sensing region assigned to the mark sensor. The speed/position controller varies speed control or position control in accordance with the output of the discontinuity sensing circuit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.