Electrophotographic copying apparatus
US4835566A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 12, 1987 |
| Grant date | May 30, 1989 |
| Priority date | — |
| Expiry date | Nov 12, 2007 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G15/04027
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A first developing device is provided in a demountable manner near a photoconductor drum of an electrophotographic copying apparatus. There is further provided a second developing device most downstream along a direction of rotation of the photoconductor drum. Developer containing color toner is stored in the first developing device and developer containing black toner is stored in the second developing device. An outline image forming unit for forming an outline image can be installed in place of the first developing device. When the first developing device is installed, development of a copy image is effected by either the first developing device or the second developing device. When the outline image forming unit is installed in place of the first developing device, an outline image formed by the outline image forming unit is developed by the second developing device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.