Image banding reduction method of photoreceptor medium of indirect transfer type image forming apparatus
US6343203B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Sep 1, 2000 |
| Grant date | Jan 29, 2002 |
| Priority date | — |
| Expiry date | Sep 1, 2020 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G2215/1695
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
To prevent banding occurring by a change in the speed of the photoreceptor medium generated when the leading edge and trailing edge of a sheet of paper pass through a transfer nip formed between a transfer roller and a fusing roller, an image banding reduction method of a photoreceptor medium of an indirect transfer type image forming apparatus is achieved by (A) separating the transfer roller and the fusing roller a predetermined distance from each other before the leading edge of paper enters the transfer nip, (B) approximating the transfer roller and the fusing roller after the leading edge of paper has entered the transfer nip, and maintaining the gap of the transfer nip in a normal state, and (C) separating again the transfer roller and the fusing roller a predetermined distance from each other before the trailing edge of paper is exhausted from the transfer nip.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.