Image forming apparatus with a squeeze roller for controlling a liquid developer quantity
US6104901A · kind A · utility
Assignees
Inventor
Key dates
| Filing date | Sep 8, 1999 |
| Grant date | Aug 15, 2000 |
| Priority date | — |
| Expiry date | Sep 8, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G2215/017
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An image forming apparatus is provided with developing units of different colors. Each developing unit is made up of a developing roller and a squeeze roller located downstream of the developing roller with respect to the rotating direction of a photosensitive drum. The outer circumference of the squeeze roller is a resin layer whose surface roughness Rz is less than 3 .mu.m. The squeeze roller is formed of a conductive material, and serves to remove a residual carrier solution from the photosensitive drum. The squeeze roller can be applied with a predetermined bias voltage. Due to the application of the bias voltage, a transfer medium is prevented from becoming dark in the background portion thereof, despite the use of small-diameter toner particles.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.