Process cartridge, electrophotographic image forming apparatus and developer amount detecting member
US6377759B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 13, 2000 |
| Grant date | Apr 23, 2002 |
| Priority date | — |
| Expiry date | Sep 13, 2020 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G2221/183
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A process cartridge detachably mountable to an electrophotographic image forming apparatus main body includes an electrophotographic photosensitive member, a process device acting on the electrophotographic photosensitive member, a measuring electrode member disposed in a part contacting developer and provided with an input side electrode and an output side electrode having at least a pair of portions disposed in parallel with a fixed interval, a reference electrode member disposed in a part not contacting the developer and provided with an input side electrode and an output side electrode having at least a pair of portions disposed in parallel with a fixed interval, an output contact for a measuring electrode electrically connected to the output side electrode of the measuring electrode member, an output contact for a reference electrode electrically connected to the output side electrode of the reference electrode member, and an input contact electrically connected to the input side electrodes of the measuring electrode member and the reference electrode member. Values of the electrostatic capacitance respectively generated by the measuring electrode member and the reference elec…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.