Color electrostatic copying machine
US4162843A · kind A · utility
53Cited by
5References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 30, 1977 |
| Grant date | Jul 31, 1979 |
| Priority date | — |
| Expiry date | Nov 30, 1997 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G2215/0119
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Three primary color toner images are transferred successively onto a copy sheet from three photoconductive drums. The copy sheet is successively moved into engagement with the drums in register with the toner images by an endless belt. Various transfer charging means are provided to electrostatically adhere the copy sheet to the belt and counteract an adverse accumulation of charge on the copy sheet caused by accumulation of toner substance thereon during the three successive transfer operations.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.