Developing apparatus, process cartridge, and electrophotographic image forming apparatus
US8019240B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 20, 2008 |
| Grant date | Sep 13, 2011 |
| Priority date | — |
| Expiry date | May 12, 2029 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G15/0875
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A developing apparatus used in an electrophotographic image forming apparatus includes: a developing roller for developing a latent image formed on a photosensitive drum; a developing container for containing developer; a developer conveying member for supplying the developer from the developing container to the developing roller; a light transmissive member provided in the developing container, and formed integrally with a light emitting guide portion for guiding, into the developing container, a detecting light from a light emitting element provided in an electrophotographic image forming apparatus main body to detect a developer remaining amount in the developing container and a light receiving guide portion for guiding the detecting light that has passed through the developing container to a light receiving element provided in the apparatus main body; and a regulating member for covering at least a space between the light emitting guide portion and the light receiving guide portion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.