Image forming apparatus which supplies image bearing member with electrically conductive particles during development
US6173144A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 7, 1999 |
| Grant date | Jan 9, 2001 |
| Priority date | — |
| Expiry date | Sep 7, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G13/025
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An image forming apparatus includes an image bearing member, a charging unit for charging the image bearing member, an image forming unit for forming an electrostatic image on the image bearing member charged by the charging unit, a developing device for developing the electrostatic image on the image bearing member and for supplying to the image bearing member charging performance enhancing particles which have a polarity opposite from that of the toner, wherein the developing device has a developer carrying member, opposed to the image bearing member, for carrying the toner and charging performance enhancing particles and also which forms an alternating electric field between the developer carrying member and the image bearing member to supply the toner and the charging performance enhancing particles to the image bearing member. A time duration for supplying the charging performance enhancing particles is longer than a time duration for supplying the toner, in an on period of the alternating electric field.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.