Image forming apparatus having charging brush with crimped and non-crimped fiber
AssigneeCanon Kabushiki Kaisha
InventorHiroki Tanaka
Life of this patent
Estimating the term…
Abstract
An image forming apparatus includes a rotatable photosensitive member and a charging brush. The charging brush forms a charging portion in contact with a surface of the photosensitive member and charges the surface of the photosensitive member. The charging brush is provided with brush fiber including a first type of fiber which is crimped and a second type of fiber which is non-crimped. A ratio of the first type of fiber in the brush fiber in a first portion of the charging brush in a moving direction of the surface of the photosensitive member in the charging portion is higher than the ratio of the first type of fiber in the brush fiber in a second portion of the charging brush positioned further downstream than the first portion in the moving direction.
Claims21
An image forming apparatus comprising:
- a rotatable photosensitive member;
- and
- a charging brush configured to form a charging portion by being in contact with a surface of the photosensitive member and to charge the surface of the photosensitive member,
- wherein the charging brush is provided with brush fiber including a first type of fiber which is crimped and a second type of fiber which is non-crimped, and
- wherein a ratio of the first type of fiber to the brush fiber in a first portion of the charging brush in a moving direction of the surface of the photosensitive member in the charging portion is higher than a ratio of the first type of fiber to the brush fiber in a second portion of the charging brush positioned further downstream than the first portion in the moving direction.
Dependencies are inferred from the claim text.