Charging device and image forming apparatus having a rotation member with a spiral protrusion
AssigneeFuji Xerox Co., Ltd.
InventorsYasuo Takayama, Sadao Okano, Akiko Kimura, Yusuke Kitagawa
Life of this patent
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Abstract
A charging device includes: an electrode; a cleaning member that cleans the electrode; a moving body that moves along the electrode, the cleaning member that is attached to the moving body; and a rotation member that is disposed along the electrode and that includes a spiral protrusion on an outer circumferential surface thereof to move the moving body, the rotation member that is rotated in a circumferential direction. A plurality of kinds of pitch intervals of the protrusion are provided on at least a central portion of the rotation member in a longitudinal direction.
Claims7
A charging device comprising:
- an electrode;
- a cleaning member that cleans the electrode;
- a moving body that moves along the electrode, the cleaning member that is attached to the moving body;
- and
- a rotation member that is disposed along the electrode and that includes a spiral protrusion on an outer circumferential surface thereof to move the moving body, the rotation member that is rotated in a circumferential direction, wherein
- a plurality of kinds of pitch intervals of the protrusion are provided on at least a central portion of the rotation member in a longitudinal direction.
An image forming apparatus comprising:
- an image carrier that is provided rotatably;
- an electrode that is disposed at a position opposite to an outer circumferential surface of the image carrier and that extends in an axial direction of the image carrier;
- a cleaning member that cleans the electrode;
- a moving body that moves along the electrode, the cleaning member that is attached to the moving body;
- and
- a rotation member that is disposed along the electrode and that includes a spiral protrusion on an outer circumferential surface thereof to move the moving body, the rotation member that is rotated in a circumferential direction, wherein
- a plurality of kinds of pitch intervals of the protrusion are provided on at least a central portion of the rotation member in a longitudinal direction.
Dependencies are inferred from the claim text.