Method of controlling toner concentration for electrophotographic copying apparatus
US4347299A · kind A · utility
15Cited by
7References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 16, 1979 |
| Grant date | Aug 31, 1982 |
| Priority date | — |
| Expiry date | Aug 16, 1999 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G15/0849
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A method of controlling toner concentration for an electrophotographic copying apparatus in which voltage to be impressed on a toner collecting or recovering roller disposed to contact a flow of a developing material after developing is arranged to vary so that a voltage lower than that for a reference density image is applied thereto for an image having a high density requiring a large toner consumption, while a voltage higher than that for the reference density image is applied thereto for an image having a low density requiring a small toner consumption.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.