Developing device with supply member and image forming apparatus
US7945196B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 31, 2008 |
| Grant date | May 17, 2011 |
| Priority date | — |
| Expiry date | Aug 1, 2029 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G15/0808
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A developing device includes a developer supporting member having an elastic layer and a surface layer, and a supply member for supplying developer to the developer supporting member. The surface layer is formed of a mixture containing at least an acrylic resin and a polyether type urethane resin. The developer supporting member and the supply member are configured so that the following equations are satisfied:20≦A1≦800.6≦D≦2.045+0.1×A1×D≦F×N≦65where A1 is a weight ratio (%) of the acrylic resin relative to a total weight of the acrylic resin and the polyether type urethane resin, F is an Asker F hardness (degree) of a surface of the supply member, and N is an overlap amount (mm) representing a biting amount of the supply member relative to the developer supporting member.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.