Variable magnification copying apparatus
US4129377A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 14, 1976 |
| Grant date | Dec 12, 1978 |
| Priority date | — |
| Expiry date | Dec 14, 1996 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G15/30
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A variable magnification copying apparatus includes optical scanning means for scanning an image original at a variable velocity in accordance with a copying magnification desired, a photosensitive drum movable at a predetermined velocity from an exposure station to an image transfer station, conveyor means for conveying copy medium to the image transfer station, detector means for generating a signal when the scanning means has scanned an edge of the image original or a portion thereof near the edge, and control means coupled to the detector means for controlling the conveyor means by the signal so as to ensure the image of the original to be copied with the leading edge thereof registered to the leading edge of the copy medium with respect to the direction of conveyance, irrespective of changes in magnification.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.