Developer-carrying member having exposed surface containing graphite or molybdenum disulfide particles
AssigneeCanon Kabushiki Kaisha
InventorsMasayuki Hama, Kazushige Nishiyama
Life of this patent
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Abstract
A developer-carrying member has a conductive substrate and a conductive resin coating layer provided on the surface of the conductive substrate. The conductive resin coating layer has a resin in which graphite particles or molybdenum disulfide particles stand dispersed, and the particles are uncovered to the surface of the conductive resin coating layer at a specific degree of uncovering. Also disclosed are a process for producing the developer-carrying member, a developing apparatus having the developer-carrying member, and an image-forming apparatus having the developing apparatus.
Claims96
A developer-carrying member comprising:
- a conductive substrate;
- and
- a conductive resin coating layer provided on the surface of the conductive substrate;
- wherein;
- said conductive resin coating layer comprises a resin in which graphite particles stand dispersed, wherein 50% or more of the exposed surface of the conductive resin coating layer is covered by said graphite particles.
A developer-carrying member comprising:
- a conductive substrate;
- and
- a conductive resin coating layer provided on the surface of the conductive substrate;
- wherein;
- said conductive resin coating layer comprises a resin in which molybdenum disulfide particles stand dispersed, wherein 30% or more of the exposed surface of the conductive resin coating layer is covered by said molybdenum disulfide particles.
A process for producing a developer-carrying member, comprising the steps of:
- primary treatment to form on the surface of a conductive substrate a conductive resin coating layer comprising a resin in which graphite particles stand dispersed;
- and
- secondary treatment to remove a surface portion of the conductive resin coating layer sufficient to provide that 30% or more of the exposed surface of the conductive resin coating layer is covered by said molybdenum disulfide particles.
A process for producing a developer-carrying member, comprising the steps of:
- primary treatment to form on the surface of a conductive substrate a conductive resin coating layer comprising a resin in which molybdenum disulfide particles stand dispersed;
- and
- secondary treatment to remove a surface portion of the conductive resin coating layer sufficient to provide that 30% or more of the exposed surface of the conductive resin coating layer is covered by said molybdenum disulfide particles.
A developing apparatus comprising:
- a positively chargeable one-component developer for developing an electrostatic latent image formed on an image-bearing member;
- and
- a developer-carrying member for carrying thereon the positively chargeable one-component developer;
- said developer-carrying member comprising a conductive substrate and a conductive resin coating layer provided on the surface of the conductive substrate, wherein;
- said conductive resin coating layer comprises a resin in which graphite particles stand dispersed, wherein 50% or more of the exposed surface of the conductive resin coating layer is covered by said graphite particles.
A developing apparatus comprising:
- a positively chargeable one-component developer for developing an electrostatic latent image formed on an image-bearing member;
- and
- a developer-carrying member for carrying thereon the positively chargeable one-component developer;
- said developer-carrying member comprising a conductive substrate and a conductive resin coating layer provided on the surface of the conductive substrate, wherein;
- said conductive resin coating layer comprises a resin in which molybdenum disulfide particles stand dispersed, wherein 30% or more of the exposed surface of the conductive resin coating layer is covered by said molybdenum disulfide particles.
An image-forming apparatus comprising:
- a developing apparatus having;
- a positively chargeable one-component developer for developing an electrostatic latent image formed on an image-bearing member;
- and
- a developer-carrying member for carrying thereon the positively chargeable one-component developer;
- said developer-carrying member comprising a conductive substrate and a conductive resin coating layer provided on the surface of the conductive substrate, wherein;
- said conductive resin coating layer comprises a resin in which graphite particles stand dispersed, wherein 50% or more of the exposed surface of the conductive resin coating layer is covered by said graphite particles.
An image-forming apparatus comprising;
- a developing apparatus having;
- a positively chargeable one-component developer for developing an electrostatic latent image formed on an image-bearing member;
- and
- a developer-carrying member for carrying thereon the positively chargeable one-component developer;
- said developer-carrying member comprising a conductive substrate and a conductive resin coating layer provided on the surface of the conductive substrate, wherein;
- said conductive resin coating layer comprises a resin in which molybdenum disulfide particles stand dispersed, wherein 30% or more of the exposed surface of the conductive resin coating layer is covered by said molybdenum disulfide particles.
Dependencies are inferred from the claim text.