Endless belt device and image forming apparatus using the device
US7277667B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 4, 2005 |
| Grant date | Oct 2, 2007 |
| Priority date | — |
| Expiry date | Nov 4, 2025 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G2215/0158
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An endless belt device includes an endless belt and a plurality of rotary members rotatably supporting the endless belt. One of the plurality of rotary members includes a marker formed on a part of a circumferential surface of a rotation axis thereof. A reflection-type sensor is arranged to oppose the circumferential surface of the rotation axis of the one of the plurality of rotary members to detect the marker formed on the circumferential surface. A rotation speed of the endless belt is detected by detecting the marker on the circumferential surface of the rotation axis of the one of the plurality of rotary members by the reflection-type sensor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.