Electro-static photo-copier machine
US4821076A · kind A · utility
5Cited by
2References
19Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 8, 1987 |
| Grant date | Apr 11, 1989 |
| Priority date | — |
| Expiry date | Jul 8, 2007 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G15/043
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
The copying machine of the present invention is capable of executing a reversal image forming mode wherein a toner is only deposited onto a non-image portion of the latent image to visualize. When the reversal image forming mode is designated, a screen member, which is movable to intrude into or extrude from the light path of the exposing means, is controlled to intrude into the light path of the exposing means to form a reversal image.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.