Scorotron type charging device with elevation suppression device for a grid plate
AssigneeSharp Kabushiki Kaisha
InventorToshio Yamanaka
Life of this patent
Estimating the term…
Abstract
A charging device which can suppress elevation of the grid plate under tension is obtained. In the charging device, elevation suppression means is provided at the opposing ends of the regulation member for regulating the distance between the surface of the photoreceptor and the grid plate. By the elevation suppression means, the breadthwise outer edge portions of the plate are forced to bend up toward the photoreceptor and the central portion thereof deflects in the opposite direction toward the regulation member and is brought into close contact therewith, so that grid plate is kept flat on a level with the regulation member.
Claims11
A charging device, comprising:
- a grid plate disposed with a prescribed distance from a surface of a photoreceptor for stabilizing electrostatic charges from a corona discharger;
- a support for holding said grid plate with its opposing ends pulled in longitudinal direction;
- a regulation member abutting a rear surface of the opposing ends of said grid plate for regulating the distance between said grid plate and said surface of the photoreceptor;
- and
- elevation suppression means for suppressing elevation of a central portion of the grid plate and bringing said central portion of the grid plate into close contact with said regulation member when tension is applied to said grid plate.
A charging device, comprising:
- a grid plate disposed with a prescribed distance from a surface of a photoreceptor for stabilizing electrostatic charges from a corona discharger;
- a support for holding said grid plate with its opposing ends pulled in longitudinal direction;
- a regulation member abutting a rear surface of the opposing ends of said grid plate for regulating the distance between said grid plate and said surface of the photoreceptor;
- and
- elevation suppression means for bringing said grid plate into close contact with said regulation member when tension is applied to said grid plate, so that a central portion of the grid plate does not elevate toward the surface of the photoreceptor.
A charging device, comprising:
- a grid plate disposed with a prescribed distance from a surface of a photoreceptor for stabilizing electrostatic charges from a corona discharger;
- a support for holding said grid plate with its opposing ends pulled in longitudinal direction;
- a regulation member abutting a rear surface of the opposing ends of said grid plate for regulating the distance between said grid plate and said surface of the photoreceptor;
- and
- an elevation suppression device for bringing said grid plate into close contact with said regulation member when tension is applied to said grid plate, so that a central portion of the grid plate does not elevate toward the surface of the photoreceptor.
Dependencies are inferred from the claim text.