Image forming method
US5327196A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 25, 1992 |
| Grant date | Jul 5, 1994 |
| Priority date | — |
| Expiry date | Nov 25, 2012 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G2215/00118
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
In an image forming method using an electrophotographic process, an amount of toner to be supplemented for maintaining a desired image density is estimated in response to input data which are a ratio of reflection densities produced by an optical sensor responsive to a pattern for control and an estimated toner consumption signal. Toner supplement control is executed on the basis of the result of estimation. The method sharply responds to a change in environment due to aging and a change in the kind of documents to thereby insure stable image density, compared to a conventional method relaying on an optical sensor or a toner sensor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.