Multiple reduction indicators for continuously variable reduction copier machines
US4105327A · kind A · utility
8Cited by
4References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 9, 1976 |
| Grant date | Aug 8, 1978 |
| Priority date | — |
| Expiry date | Dec 9, 1996 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G15/041
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A continuously variable reduction optical system for document copiers wherein a plurality of sets of reduction indicators are provided, each set corresponding to a particular size copy paper. Each set of indicators can be moved by the operator to frame the document to be copied and simultaneously the reduction optical system is set to provide proper adjustment for all system parameters. The indicators are continuously viewable by the operator. An embodiment is disclosed wherein each indicator is positioned so that reduction ratio is maintained whatever the copy paper size.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.