Image forming apparatus
US8676067B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 30, 2011 |
| Grant date | Mar 18, 2014 |
| Priority date | — |
| Expiry date | Oct 5, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G2215/0141
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An image forming apparatus includes: a photoconductor; a charger configured to charge the photoconductor, the charger including a discharge wire and a grid; a voltage applying circuit configured to generate charge voltage and apply the charge voltage to the discharge wire of the charger; a grid-current detector configured to detect a grid current passing through the grid; a controller configured to control the voltage applying circuit on the basis of a detection value detected by the grid-current detector so that the grid current is constant; an abnormal-discharge detector configured to detect an abnormal discharge occurring in the charger; and a suppression resistor configured to suppress abnormal discharge energy. The suppression resistor includes a first terminal and a second terminal. The first terminal is connected to the grid. The second terminal is connected to at least one of the grid-current detector and the abnormal-discharge detector.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.