Image forming apparatus for forming toner image using developer made of toner and carrier
US7831159B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 18, 2007 |
| Grant date | Nov 9, 2010 |
| Priority date | — |
| Expiry date | Jun 7, 2028 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G2215/0891
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An apparatus is configured to charge an image bearing member in a charging section, develop an electrostatic image formed on the image bearing member, and transfer a toner image formed on the image bearing member to a transfer medium in a transfer section. The apparatus includes a charging auxiliary apparatus for changing a charge amount of toner on the image bearing member. The charging auxiliary apparatus includes a charging auxiliary member contacting with the image bearing member downstream of the transfer section and upstream of the charging section and a voltage applying device to apply a voltage to the charging auxiliary member. The apparatus includes a first detector to detect a current flowing in the charging auxiliary member during a period of non-image formation when the voltage is applied to the charging auxiliary member, a second detector to detect information regarding a toner density in the developing apparatus, and a control device to control toner supply to the developing apparatus based on detection results of both the detectors.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.