Image forming apparatus featuring phase relationship adjustment between image bearing members
US8620185B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Nov 18, 2010 |
| Grant date | Dec 31, 2013 |
| Priority date | — |
| Expiry date | Jan 9, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G2215/0158
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A phase synchronization mode is performed at a time of subsequent rotation after image formation. After detection of a phase difference by phase detecting sensors 103a, 103d, rotation phases are synchronized between driving motors 111, 102d after a lapse of a variable time. Specifically, timing for starting the rotation phase synchronization is shifted by 20 msec for each phase synchronization control so as to vary angular positions of the photosensitive drums 101a, 101b, 101d at which phase control is started. In this manner, sliding-contact positions are distributed and development and concentration of sliding-contact damages are prevented on the photosensitive drums 101a, 101b, 101d.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.