Belt device including an annular belt, and an image forming apparatus for detection of rotational angular speed or rotational angular displacement
US7499665B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 17, 2006 |
| Grant date | Mar 3, 2009 |
| Priority date | — |
| Expiry date | Feb 14, 2027 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G2221/1642
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
One end of a rotational shaft of a supporting rotational body attached with a rotational member is rotatably supported. The rotational member is sandwiched by a supporting frame that rotatably supports supporting rotational bodies spanned with an annular belt and fixing members fixed to the supporting frame. Thus, the one end of the rotational shaft is supported by the supporting frame and the fixing members at, at least two points. A mark detector is fixed to the fixing members, and the fixing members are fixed to the supporting frame at, at least two points. Accordingly, erroneous detection of a rotational angular speed or a rotational angular displacement of a supporting rotational body due to vibration of the supporting rotational body can be suppressed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.