Copying apparatus
US4772922A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 31, 1987 |
| Grant date | Sep 20, 1988 |
| Priority date | — |
| Expiry date | Mar 31, 2007 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B2227/325
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Copying apparatus is constituted by a photosensitive member having a photochromic characteristic when changes light transmitibility when projected with light reflected by a manuscript. A light source is provided for projecting a photo-image formed on the photosensitive member onto a photosensitive recording sheet through the photosensitive member. In a modified embodiment, the copying apparatus has a construction substantially the same as the conventional electrophotographic copying machine except that a photosensitive drum is made of transparent material and covered by a thin transparent photoconductor. Consequently a toner image corresponding to the photo-image of a manuscript is formed on the photosensitive drum. A light source is provided for projecting the toner image on a photosensitive recording sheet.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.