Image forming apparatus having image transfer member
US5150165A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 9, 1991 |
| Grant date | Sep 22, 1992 |
| Priority date | — |
| Expiry date | Apr 9, 2011 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G15/1685
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An image forming apparatus having an image bearing member and an image transfer charger for transferring a toner image from the image bearing member onto a transfer material. The transfer charger has a transfer member contactable to the backside of the transfer material. The transfer member includes a conductive base, and a surface layer outside the eleastic layer. The transfer member's characteristics fall within the parameters of: EQU 5.times.10.sup.7 .ltoreq.R.sub.2 .ltoreq.5.times.10.sup.10 (ohm.cm), and EQU R.sub.1 d.sub.1 /R.sub.2 d.sub.2 .gtoreq.10 where r.sub.1 is a volume resistivity of the elastic layer, d.sub.1 is a thickness of the elastic layer, R.sub.2 is a volume resistivity of the surface layer, and d.sub.2 is a thickness of the surface layer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.