Charging member having a foamed layer of a material with specified density and pore properties, charging device, process cartridge and image forming apparatus featuring the charging member
US5543899A · kind A · utility
21Cited by
2References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 28, 1994 |
| Grant date | Aug 6, 1996 |
| Priority date | — |
| Expiry date | Apr 28, 2014 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G15/0233
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A charging member for charging a member to be charged includes a foamed layer; a supporting member for supporting the foamed layer, and for being supplied with a voltage; a resistance layer closer to the member to be charged than the foamed layer; wherein the foamed layer has a specific gravity not less than 0.1 (g/cm.sup.3) and not more than 0.6 (g/cm.sup.3), and wherein an average outer diameter of pores in a cross-section of said foamed layer is not less than 50 microns and not more than 1 mm.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.