Grid electrode, scorotron charger, and image forming device
US7212771B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 29, 2005 |
| Grant date | May 1, 2007 |
| Priority date | — |
| Expiry date | Aug 3, 2025 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G2215/027
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A grid electrode, disposed along a corotron wire, includes a planar, plate-shaped member having plural openings in each of which a longitudinal direction and a short side direction are formed, the longitudinal directions of the respective openings being lined up to be in a same direction, and connecting portions connecting openings adjacent to each other in a opening longitudinal direction and connecting portions connecting openings adjacent to each other in a opening short side direction. At each opening, a shortest distance from a center point to an opening edge is less than 1.5 mm, a grid opening ratio is greater than or equal to 82%, and a length of the longitudinal direction is at least 1.3 times a length of the short side direction. The connecting portions connecting openings adjacent to each other in the opening longitudinal direction are not disposed on a same line which is orthogonal to the corotron wire.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.