Developing device having toner agitation member and cleaning member cleaning light transmission window
US6337956B1 · kind B1 · utility
53Cited by
16References
77Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 18, 2000 |
| Grant date | Jan 8, 2002 |
| Priority date | — |
| Expiry date | Feb 18, 2020 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G2215/0897
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A developing device having a toner container in which a toner agitator and a cleaning member is provided. The toner agitator agitates the toner in the toner container and transport the toner into a developing chamber. The toner container has a pair of light transmission windows through which light passes. If no toner exist between the light transmission windows, the light passes through the two windows to provide a signal indicative of exchange of the developing device with a new device. If toner exists therebetween, light cannot pass through two windows. The cleaning member wipes off the toner from the surface of the windows.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.