Wiper arrangement for toner level sensor
US4135642A · kind A · utility
10Cited by
6References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 2, 1977 |
| Grant date | Jan 23, 1979 |
| Priority date | — |
| Expiry date | Jun 2, 1997 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S222/01
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A toner dispenser having a rotatable cylindrical dispenser roll and an automatic low toner level indicator comprising a lamp and photocell mounted in opposed walls of the dispenser adjacent the bottom of the dispenser housing. The lamp and photocell are separated from the toner in the dispenser by transparent windows. A wiping arrangement is provided inside the dispenser to periodically clean the windows including wiper pads biased into contact with the windows and movable periodically back and forth across the surface of the windows in response to rotation of the dispenser roll.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.