Developing device, and process unit and image forming apparatus using the developing device
US7551862B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 12, 2007 |
| Grant date | Jun 23, 2009 |
| Priority date | — |
| Expiry date | Jun 12, 2027 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G2215/0888
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A developing device including a developer bearing member configured to configured to bear thereon a developer including a toner and a magnetic carrier to develop an electrostatic image on an image bearing member with the developer; a developer container configured to contain and feed the developer to the developer bearing member; a toner concentration sensor configured to detect a concentration of the toner in the developer in the developer container and output a signal depending on the detected toner concentration; and a characteristic information storage device configured to store a characteristic of the toner concentration sensor, wherein the sensor information storage device is separated from the toner concentration sensor. A process unit including an image bearing member and the developing device. An image forming apparatus including an image bearing member, the developing device and a controller.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.