Image forming apparatus including first and second image forming devices and first and second belt units
US8260179B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 1, 2010 |
| Grant date | Sep 4, 2012 |
| Priority date | — |
| Expiry date | Dec 27, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G15/167
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An image forming apparatus includes a primary transfer device that primarily transfers a first image from a first image bearer onto a first belt unit at a primary transfer position, a secondary transfer device that secondarily transfers the first image from the first belt unit onto a printing medium at a secondary transfer position, and a direct transfer device that directly transfers a second image from a second image bearer onto the printing medium at a direct transfer position. A second belt unit is rotatably suspended by plural second rollers and carries and conveys the printing medium through the direct transfer position and the secondary transfer position. An interval between the direct transfer position and the secondary transfer position is prescribed natural number times of a circumference of one of the plural second rollers, which fluctuates a velocity of the second belt unit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.