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US 8,554,112 B2Granted
Charging device
AssigneeCanon Kabushiki Kaisha
InventorHiroyuki Kidaka
Life of this patent
Estimating the term…
Abstract
A charging device includes a corona charger; a shutter of a sheet for shielding an opening of said corona charger, the sheet having such a property that it is curled about an axis when said shutter absorbs moisture; and a winding-up device for winding up the shutter. The axis and a winding-up direction in which the shutter is wound up by the winding-up means form an angle therebetween from 45 degrees to 135 degrees.
Claims8
A charging device comprising:
- a corona charger;
- a shutter comprising a sheet for shielding an opening of said corona charger, said sheet having such a property that it is curled about an axis when said sheet absorbs moisture;
- and
- a winding-up device configured to wind up said shutter,
- wherein the axis and a winding-up direction in which said shutter is wound up by said winding-up device form an angle therebetween from 45 degrees to 135 degrees.
2 more elements
A charging device comprising:
- a corona charger configured to electrically charge a member-to-be-charged through an opening;
- and
- a sheet-like shutter configured to move along a longitudinal direction of said corona charger to open and close the opening, said sheet-like shutter having such a property that it is curled about an axis direction when said sheet-like shutter absorbs moisture,
- wherein the axis direction and the longitudinal direction of said corona charger form an angle therebetween from 45 degrees to 135 degrees.
1 more element
Dependencies are inferred from the claim text.