Configuration of a developing device blade and image forming apparatus
US8265529B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 25, 2010 |
| Grant date | Sep 11, 2012 |
| Priority date | — |
| Expiry date | Aug 1, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G15/0812
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A developing device include: a case; a developing roller supported by the case to be rotatable in a rotational direction; and a blade including a base end supported by the case and a tip end provided upstream of the base end in the rotational direction and contacting the surface of the developing roller at a contact portion to regulate a thickness of the toner on the developing roller. The blade further includes a bent portion that is bent from the contact portion at a radius of curvature from 0.2 mm to 0.4 mm to be separated from the developing roller as extending toward the tip end. An angle defined between a segment connecting the contact portion with a center of curvature of the bent portion and a segment connecting the tip end with the center of curvature of the bent portion is in the range from 45° to 90°.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.