Recirculating documents duplex copier
US4330197A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 28, 1980 |
| Grant date | May 18, 1982 |
| Priority date | — |
| Expiry date | Jul 28, 2000 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G2215/00556
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An automatic pre-collation duplex copier in which original documents having either an odd or even number of pages may be recirculatively copied in reverse serial order yet provide properly collated output duplex copy sets. A simplex/duplex copying system is disclosed in which, when an odd number of document sheets are detected in a first, non-copying, circulation of the document sheets, the copying of the last and subsequent alternate document sheets is inhibited during the first copying circulation, whereas if an even number of document sheets are detected, the copying of the second and subsequent alternate document sheets is inhibited during this first copying circulation, and these different copying sequences are reversed for the last copying circulation. All document sheets are copied during the intermediate circulations. A compatible duplex/duplex copying system is also disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.