Electrophotographic copying machines of variable magnification
US4105326A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 9, 1976 |
| Grant date | Aug 8, 1978 |
| Priority date | — |
| Expiry date | Aug 9, 1996 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G15/041
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An electrophotographic copying machine of the type in which an original and a photosensitive member are both moved while maintaining a given optical relationship therebetween so that an optical system interposed between them focuses an image of the original onto the photosensitive member. A conveyor means is provided in the top portion of the machine, along with a plurality of original carriers for enabling a copying process to be performed at various magnifications which may be either equal to, greater or less than unity, the respective carriers being selectively adapted, when placed on the conveyor means to locate the original thereon at different respective distances from the optical system. Each carrier is moved with a varying speed which depends on the desired magnitude of the magnification while the photosensitive member is driven with a uniform speed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.