Copying machine control apparatus comprising variable length program control
US4391507A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 5, 1981 |
| Grant date | Jul 5, 1983 |
| Priority date | — |
| Expiry date | Mar 5, 2001 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G21/145
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Timing pulses (TP) are generated in response to incremental rotation of a photoconductive drum (40). The pulses (TP) are counted by a presettable counter (10) and decoded to produce control signals (STEP.sub.n) for scanning of an original document, sheet feed and other operations. When the count in the counter (10) reaches a certain value, the counter (10) is preset to a value depending on the paper size. A single control program is provided having a sequence of fixed program steps which are executed in response to respective counts in the counter (10). The smaller paper lengths are accommodated by programably presetting the counter (10) in such a manner as to skip unnecessary count sequences.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.