Contact-type electroconductive brush for electrically charging an image carrier of an image forming apparatus
US5294962A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Nov 5, 1992 |
| Grant date | Mar 15, 1994 |
| Priority date | — |
| Expiry date | Nov 5, 2012 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G15/0233
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An image forming apparatus includes an image carrier which is rotated in a predetermined direction, a brush charger which charges a surface of the carrier, an exposure unit which forms an electrostatic latent image on the charged surface of the carrier in accordance with image information supplied thereto, a developer which develops the electrostatic latent image with a toner, and a transfer unit which transfers a toner image from the surface of the carrier onto a transfer medium supplied thereto. The image carrier includes a conductive main body, an undercoat having a predetermined electric resistance higher than that of the main body, and a photosensitive layer, which is formed on the undercoat, and on which an electrostatic latent image is formed by the exposure unit after charging is performed by the charger. The charger includes a main body constituted by bristles consisting of conductive fibers having electric resistance within the range from about 10.sup.6 to about 10.sup.9 .OMEGA./cm, a conductive base cloth, which has an electric resistance lower than that of each of the brush bristles, and on which the bristles are furnished, and a base member to which the base cloth is f…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.