Developing apparatus with elastic regulating member urged to a developer carrying member
AssigneeCanon Kabushiki Kaisha
InventorsKeiji Okano, Hiroto Hasegawa, Toshio Miyamoto, Katsuhiko Nishimura, Tatsunori Ishiyama
Life of this patent
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Abstract
A developing apparatus for developping an electrostatic latent image includes a movable developer carrying member facing toward or contacted with an image bearing member in a developing zone. An elastic regulating member for forming a regulated developer layer on the developer carrying member is elastically urged toward the developer to form a nip therebetween, through which the developer is conveyed to the developing zone. Fine particles different from particles constituting the developer are arranged on the surface of the regulating member comprising the nip.
Claims17
A developing apparatus for developing an electrostatic latent image, comprising:
- a movable developer carrying member for carrying a particle developer facing toward or contacted to an image bearing member in a developing zone;
- an elastic regulating member for forming a regulated developer layer on said developer carrying member, said regulating member being elastically urged toward said developer carrying member to form a nip therebetween, through which the developer is conveyed to the developing zone;
- and
- fine particles, different from particles constituting the developer arranged on a surface of said regulating member comprising the nip;
- wherein an average particle size of said fine particles is smaller than an average particle size of particles constituting the developer.
A developing apparatus for developing an electrostatic latent image, comprising:
- a movable developer carrying member for carrying a developer facing toward or contacted to an image bearing member in a developing zone;
- an elastic regulating member for forming a regulated developer layer on said developer carrying member, said regulating member being elastically urged toward said developer carrying member to form a nip therebetween, through which the developer is conveyed to the developing zone;
- wherein said elastic regulating member comprises a resin layer in which solid lubricant particles are arranged on a surface of said regulating member comprising the nip.
A developing apparatus for developing an electrostatic latent image, comprising:
- a movable developer carrying member for carrying a developer facing toward or contacted to an image bearing member in a developing zone;
- an elastic regulating member for forming a regulated developer layer on said developer carrying member, said regulating member being elastically urged to said developer carrying member to form a nip therebetween, through which the developer is conveyed to the developing zone;
- and
- fine resin particles, different from particles constituting the developer, arranged on a surface of said regulating member constituting the nip;
- wherein a triboelectric charge polarity of said fine resin particles is opposite from a triboelectric charge polarity of the developer, and
- wherein said developer carrying member has a resin surface layer in which graphite is dispersed.
A developing apparatus for developing an electrostatic latent image, comprising:
- a movable developer carrying member for carrying a developer facing toward or contacted to an image bearing member in a developing zone;
- an elastic regulating member for forming a regulated developer layer on said developer carrying member, said regulating member being elastically urged to said developer carrying member to form a nip therebetween, through which the developer is conveyed t the developing zone;
- and
- fine resin particles, different from particles constituting the developer, arranged on a surface of said regulating member constituting the nip;
- wherein a triboelectric charge polarity of said fine resin particles is opposite from a triboelectric charge polarity of the developer, and
- wherein the surface of said regulating member comprising the nip has a surface roughness smaller than an average particle size of particles constituting the developer, and said fine particles are retained on the surface of said regulating member constituting the nip.
Dependencies are inferred from the claim text.