Image forming apparatus
AssigneeCanon Kabushiki Kaisha
InventorsKatsuhiro Sakaizawa, Norio Takahashi, Shuji Moriya, Rie Endo
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Abstract
An image forming apparatus is provided, which controls an appropriate developer amount for a desired image so that an image defect such as an unclear font or a white area is prevented, resulting in a stable image formation for a long term. A developer regulating member has a resistance value varying depending on a voltage to be applied. A control device changes over the voltage to be applied to the developer regulating member during the image formation according to image information and changes a potential difference between the developer carrying member and the developer regulating member.
Claims9
An image forming apparatus, comprising:
- an image bearing member on which an electrostatic latent image is formed;
- a developing device for visualizing the electrostatic latent image with developer, the developing device including a rotatable developer carrying member and a developer regulating member for regulating an amount of developer carried by the developer carrying member;
- a voltage applying device for individually applying voltages to the developer carrying member and the developer regulating member;
- and
- a control device for controlling the voltage applying device,
- wherein the developer regulating member has a resistance value varying depending on a voltage applied to the developer regulating member, and
- the control device changes a voltage to be applied to the developer regulating member depending on image information about an image to be formed and changes a potential difference between the developer carrying member and the developer regulating member.
Dependencies are inferred from the claim text.