Copier with a toner supply device
US4952976A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 19, 1988 |
| Grant date | Aug 28, 1990 |
| Priority date | — |
| Expiry date | Jul 19, 2008 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G15/0862
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A copier with a toner supply device which includes a toner cartridge. Toner is supplied from the toner cartridge to a hopper section of a developing unit of the copier and from the toner hopper section to a developing section which includes a developing sleeve. The end of toner in the toner hopper is sensed by a toner end sensing mechanism. A switching device is provided which performs an on-off operation as an operation for supplying toner from a new or full toner cartridge proceeds. A controller controls the developing unit, toner end sensing mechanism and switching device to insure good reproductions even before or immediately after the supply of toner.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.