Back to results
US 4,989,044 AGranted
Developing apparatus for developing electrostatic latent images
AssigneeCanon Kabushiki Kaisha
InventorsKatsuhiko Nishimura, Michihito Yamazaki, Keiji Okano, Motoi Katoh, Kouichi Suwa, Yasushi Sato, Kimio Nakahata
Life of this patent
Estimating the term…
Abstract
A developing apparatus using one component developer includes a developing sleeve for carrying the developer to a developing zone. The developing sleeve has an outer coating layer made of resin material in which electrically conductive fine particles are dispersed.
Claims28
A developing apparatus for developing an electrostatic latent image, comprising:
- a movable developer carrying member for carrying one component developer to a developing zone where said developer carrying member is opposed to a latent image bearing member for carrying the electrostatic latent image, said developer carrying member being effective to triboelectrically charge the developer to a polarity for developing the latent image;
- a regulating member for regulating a thickness of a layer of the developer on said developer carrying member to a thickness smaller than a minimum clearance between said developer carrying member and the image bearing member;
- and
- a voltage source for applying a developing bias voltage to said developer carrying member to transfer the developer from said developer carrying member to said image bearing member;
- wherein said carrying member is provided with an outer layer of resin material in which fine conductive particles containing fine carbon particles and fine graphite particles are dispersed, and wherein secondary particles formed by the resin material and the fine conductive particles are distributed at a surface of the outer layer to form a rough surface.
2 more elements
A developing apparatus for developing an electrostatic latent image, comprising:
- a movable developer carrying member for carrying one component developer to a developing zone where said developer carrying member is opposed to a latent image bearing member for carrying the electrostatic latent image, said developer carrying member being effective to triboelectrically charge the developer to a polarity for developing the latent image;
- a regulating member for regulating a thickness of a layer of the developer on said developer carrying member to a thickness smaller than a minimum clearance between said developer carrying member and the image bearing member;
- and
- a voltage source for applying a developing bias voltage to said developer carrying member to transfer the developer from said developer carrying member to said image bearing member;
- wherein said developer carrying member has an outer coating layer of resin material in which fine graphite particles are dispersed.
2 more elements
A developing apparatus for developing an electrostatic latent image, comprising:
- a movable developer carrying member for carrying one component developer, which contains toner to which negatively chargeable hydrophobic silica has been added, to a developing zone where said developer carrying member is opposed to a latent image bearing member for carrying the electrostatic latent image, said developer carrying member being effective to charge the toner to a negative polarity;
- a regulating member of regulating the thickness of a layer of the developer on said developer carrying member to a thickness smaller than a minimum clearance between said developer carrying member and the image bearing member;
- and
- a voltage source for applying a developing bias voltage to said developer carrying member to transfer the toner from said developer carrying member to said image bearing member;
- wherein said developer carrying member has an outer coating layer of resin material in which fine carbon particles and fine graphite particles are dispersed.
2 more elements
Dependencies are inferred from the claim text.