Service life indicator for a process cartridge
US4771313A · kind A · utility
27Cited by
31References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 19, 1983 |
| Grant date | Sep 13, 1988 |
| Priority date | — |
| Expiry date | Sep 19, 2003 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G2221/1846
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A service life indicator for an image forming process cartridge which contains a consumable used for image formation and is detachably mountable into a main assembly for the image formation, comprises a switching device, adapted to be provided in the process cartridge, actuatable in response to consumption of the consumable, and a warning device, responsive to the switching device, for warning an operator of when the service life of the process cartridge has been consumed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.