Charging device for electrophotography
AssigneeRank Xerox Ltd.
InventorsSeiji Matsumoto, Isoji Takahashi
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Abstract
A charging device for an electrophotographic apparatus wherein at least a first portion of a control plate is movable relative to a corona generating device. A support member having a photoconductive insulating layer is maintained in spaced relationship relative to the corona generating device. A suitable mechanism is operably associated with the control plate for varying the position of at least the first portion of the control plate relative to the corona generating device to thereby adjust the strength of the corona discharge from the portion of the corona generating device generally adjacent the first portion of the control plate.
Claims4
In combination
- a chargable insulating surface having a directly grounded portion and another portion which is not directly grounded,
- corona electrode means overlying said surface, said electrode means having a first segment overlying said directly grounded portion and a second segment overlying said portion of said surface which is not directly grounded, and
- movable control plate means for varying the corona discharge generated adjacent said first segment relative to the corona discharge adjacent said second segment, whereby the flow of charge from said second segment to said indirectly grounded portion is greater than that from said first segment to said portion which is directly grounded.
Dependencies are inferred from the claim text.