Image forming apparatus with charging device of corona type
AssigneeCanon Kabushiki Kaisha
InventorMasanobu Nakajima
Life of this patent
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Abstract
An image forming apparatus includes a rotatable photosensitive member; a corona charger provided with an opening opposed to a surface of the photosensitive member; image forming means for forming a toner image on the photosensitive member; a shutter for opening and closing the opening relative to the photosensitive member; sliding means for sliding in contact with the photosensitive member; measuring means for measuring time elapsed from end of image formation; and control means for controlling the apparatus on the basis of an output of the measuring means such that shutter is closed and the photosensitive member is rotated in contact with the sliding means.
Claims10
An image forming apparatus comprising:
- a rotatable photosensitive member;
- a corona charger provided with an opening opposed to a surface of said photosensitive member;
- an image forming device configured to form a toner image on said photosensitive member;
- a shutter configured to open and close said opening relative to said photosensitive member;
- a sliding device configured to remove a byproduct of an electrical discharge of said corona charger from said photosensitive member when said sliding device is in sliding contact with said photosensitive member;
- and
- a control device configured to control an operation of said image forming apparatus,
- wherein said control device is configured to control said image forming apparatus so as to stop rotation of said photosensitive member with said shutter kept opened after completion of image formation, and
- wherein in a case that said opening is to be closed after the stop of the rotation of said photosensitive member, said control device rotates said photosensitive member to remove the byproduct from said photosensitive member by said sliding device, immediately before, during or immediately after said shutter closes said opening.
An image forming apparatus comprising:
- a rotatable photosensitive member;
- a corona charger provided with an opening opposed to a surface of said photosensitive member,
- image forming means configured to form a toner image on said photosensitive member;
- a shutter configured to open and close said opening relative to said photosensitive member;
- sliding means configured to remove a byproduct of an electrical discharge of said corona charger from said photosensitive member when said sliding means is in sliding contact with said photosensitive member;
- and
- control means configured to control an operation of said image forming apparatus,
- wherein said control means is configured to control said image forming apparatus so as to stop rotation of said photosensitive member with said shutter kept opened after completion of image formation, and
- wherein in a case that said opening is to be closed after the stop of the rotation of said photosensitive member, said control means rotates said photosensitive member to remove the byproduct from said photosensitive member by said sliding means, immediately before, during or immediately after said shutter closes said opening.
Dependencies are inferred from the claim text.