Developer restoring unit in an image forming apparatus
US5128724A · kind A · utility
41Cited by
9References
32Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | Dec 18, 1989 |
| Grant date | Jul 7, 1992 |
| Priority date | — |
| Expiry date | Dec 18, 2009 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G21/105
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A developer circular unit is detachably set in a copier or a copier type printer which print on images on a paper sheet with toner. The unit includes at least a developing device, a cleaner, and a developer conveying device having a pipe communicated with both the cleaner and the developing device and a toner flowing-back preventing mechanism. The action of the mechanism is automatically released by the first set of the unit in the copier or printer and/or the first use of the copier or printer after that first set.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.