Corona charger having two charging regions
US7738813B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 16, 2007 |
| Grant date | Jun 15, 2010 |
| Priority date | — |
| Expiry date | Jul 22, 2028 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G2215/026
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A corona charger includes a case provided in the vicinity of a device to be charged. The case includes an opening facing the device, a discharge electrode, a first charging region, and a second charging region. The discharge electrode provided inside the case and supplied with a voltage so as to generate a corona discharge charges a surface of the device from the opening by supplying the corona discharge to the surface. The first charging region includes no grid electrode at a position upstream of the opening in a surface moving direction of the device. The second charging region includes a grid electrode to which a predetermined voltage is applied at a position downstream of the opening. The voltage applied to the discharge electrode is an alternating current (AC) voltage superimposed on a direct current (DC) voltage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.