Recirculative document duplex copying
US4561772A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 25, 1983 |
| Grant date | Dec 31, 1985 |
| Priority date | — |
| Expiry date | May 25, 2003 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G15/23
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
In a system for recirculative precollation copying of a set of simplex document sheets in reverse serial order on a copier providing a choice of precollated simplex or duplex (two-sided) copy sheet copying, more efficient duplex copying without an initial document counting circulation is provided by assuming that the copy sheets selected for duplex copying are non-orientation sensitive copy sheets such as plain paper (rather than special orientation restricted copy sheets requiring consistent inversion for proper output or binding edge orientation, such as sheets prepunched with binder holes, certain preprinted sheets, etc.) by making an initial assumption as to whether there are an odd or even number of simplex document sheets in the set of document sheets before they are counted, by making a selection of whether it is desired to copy odd or even document sheets in the first circulation of the document set for copying, then, in response to this initial assumption and selection and choice of duplex copying, automatically circulating the set of document sheets for copying onto copy sheets on the first circulation of the document set before they have been counted, wherein the copying…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.