Charging device
AssigneeCanon Kabushiki Kaisha
InventorHiroki Kisu
Life of this patent
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Abstract
A charging device includes a charging member for electrically charging a member to be charged, a spacer for maintaining a clearance between said charging member and the member to be wherein the clearance is not less than 5 microns and not more than 300 microns. The charging member is supplied with a voltage having a waveform obtained as a sum of an AC voltage and a DC voltage, wherein a peak-to-peak voltage of the vibratory voltage is not less than twice the absolute value of the charge starting voltage relative to the member to be charged.
Claims12
A charging device comprising:
- a charging member for electrically charging a member to be charged;
- means for maintaining a clearance of not less than 5 microns and not more than 300 microns between said charging member and the member to be charged;
- and
- voltage application means for applying a vibratory voltage between the charging member and the member to be charged.
A device according to calim 3, wherein said charging member is in the form of a blade.
An image forming apparatus, comprising:
- an image bearing member;
- means for forming an image on said image bearing member;
- a charging member for electrically charging the image bearing member;
- means for maintaining a clearance of not less than 5 microns and not more than 300 microns between said charging member said image bearing member;
- and
- voltage application means for applying a vibratory voltage between said charging member and said image bearing member.
Dependencies are inferred from the claim text.