Computer controlled electrostatic copying machine
US4203663A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 10, 1978 |
| Grant date | May 20, 1980 |
| Priority date | — |
| Expiry date | Oct 10, 1998 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G21/145
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An imaging optical system (34) scans an original document (58) and radiates a light image thereof onto a photoconductive drum (31) to form an electrostatic image which is developed to form a toner image. A first pulse generator (62) is driven synchronizingly by rotation of the drum (31) to produce first pulses. A second pulse generator which may include a clock pulse generator (19) for a microcomputer (12) used to control the operation of the copying machine (11) and a frequency divider (78) produces second pulses having a frequency typically ten times that of the first pulses. First and second counters (71), (79) count the first and second pulses respectively, the second counter (79) being reset by each of the first pulses. A sensor (83) senses a predetermined scan position of the optical system (34) and generates an electrical signal. A computer which may be embodied by the microcomputer (12) in response to the signal, stores first and second counts of the first and second counters (71 ), (79), adds a predetermined number to the first count to obtain a third count and actuates a copy sheet feed unit (44) to feed a copy sheet (37) into toner image transferring engagement with the …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.