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US 2018/0267433 A1Published application
Development device for an electrostatic latent image
AssigneeCanon Kabushiki Kaisha
InventorRyohei Terada
Life of this patent
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Abstract
A development device includes a power source capable of applying a second voltage higher than a first voltage to be applied to a developer bearing member, a scattering prevention electrode that is arranged opposite the developer bearing member and to which the second voltage is applied from the power source, and a step-down circuit. The step-down circuit steps down a voltage from the power source from the second voltage to the first voltage to apply the stepped-down voltage to the developer bearing member.
Claims9
A development device comprising:
- a developer container configured to store developer including toner and carrier;
- a rotatable developer bearing member configured to bear and convey the developer inside the developer container to develop an electrostatic latent image formed on an image bearing member;
- a magnetic field generation member arranged inside the developer bearing member, the magnetic field generation member including:
- a development pole positioned opposite the image bearing member, and
- a stripping pole arranged on a downstream side of the developer pole in a rotational direction of the developer bearing member and configured to strip the developer on the developer bearing member from the developer bearing member,
- an electrode portion arranged between the development pole and the stripping pole and opposite the developer bearing member;
- a direct current power source;
- and
- an electric circuit configured to apply voltage having a same polarity as a normal charge polarity of the toner to each of the developer bearing member and the electrode portion from the direct current power source,
- wherein the voltage to be applied to the electrode portion has an absolute value greater than an absolute value of the voltage to be applied to the developer bearing member.
7 more elements
Dependencies are inferred from the claim text.