Color image forming apparatus
US8260160B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 23, 2010 |
| Grant date | Sep 4, 2012 |
| Priority date | — |
| Expiry date | Mar 7, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G2215/00063
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A color image forming apparatus having photosensitive members; developing devices for developing electrostatic latent images formed on the photosensitive members into toner images with developers comprising toner and carriers; toner concentration sensors for detecting toner concentrations of the developers in the respective developing devices; a toner image bearing member for bearing the toner images temporarily; a toner adherence amount sensor for detecting toner adherence amounts of the toner images held on the image bearing member; and a controller for calculating, with respect to the developing devices, individual optimal developing bias voltage ranges within which a target toner adherence amount can be achieved while the toner concentrations of the developers are within a predetermined toner concentration range from a lower limit to an upper limit, so as to specify a common optimal developing bias voltage range that are commonly suitable for all the developing devices to achieve the target toner adherence amount while the toner concentrations of the developers in the developing devices are within the predetermined toner concentration range, and for calculating target toner con…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.