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US 5,862,444 AGranted
Developing roller having another coating of fine particles
AssigneeMinolta Co., Ltd.
InventorsJunji Machida, Shuichi Nakagawa, Hiroshi Goto, Yoichi Fujieda, Ryuji Inoue, Chikara Tsutsui
Life of this patent
Estimating the term…
Abstract
A development system that contains a developer carrier for carrying a developer on the surface thereof to a development region opposite to an image bearing body, and a regulating member biased into contact with the surface of the developer carrier by a predetermined pressure for regulating an amount of developer carried by a developer transport member. The developer carrier has a surface coated with fine particles with an average particles size of between 3 and 30 .mu.m which are bonded with the surface.
Claims16
A development system comprising:
- a developer carrier for carrying a developer on a surface thereof to a development region opposite to an image bearing body, and
- a regulating member biased into contact with the surface of the developer carrier by a predetermined pressure for regulating an amount of developer carried by a developer transport member,
- said developer carrier having a surface coated with fine particles with an average particle size of between 3 and 30 .mu.m bonded with the surface.
A development system, comprising:
- a developer carrier for carrying a developer on a surface thereof to a development region opposite to an image bearing body, and
- a regulating member biased into contact with the surface of the developer carrier by a predetermined pressure for regulating an amount of developer carried by a developer transport member,
- said developer carrier having a surface coated with fine particles with an average particle size of between 3 and 30 .mu.m bonded with the surface,
- characterized by satisfying a condition of 10.ltoreq..vertline.A-B.vertline..ltoreq.80, wherein "A" denotes a shape factor SF-1A of said developer and "B" denotes a shape factor SF-1B of the fine particles.
1 more element
A development system, comprising:
- a developer carrier for carrying a developer on a surface thereof to a development region opposite to an image bearing body, and
- a regulating member biased into contact with the surface of the developer carrier by a predetermined pressure for regulating an amount of developer carried by a developer transport member,
- said developer carrier having a surface coated with fine particles with an average particle size of between 3 and 30 .mu.m bonded with the surface,
- wherein said layer of the fine particles contains a styrene-acrylic resin and low-molecular-weight polyolefin wax.
1 more element
A development system, comprising:
- a developer carrier for carrying a developer on a surface thereof to a development region opposite to an image bearing body, and
- a regulating member biased into contact with the surface of the developer carrier by a predetermined pressure for regulating an amount of developer carried by a developer transport member,
- said developer carrier having a surface coated with fine particles with an average particle size of between 3 and 30 .mu.m bonded with the surface,
- wherein said layer of fine particles contains a polyester resin and a magnetic powder.
1 more element
A development system, comprising:
- a developer carrier for carrying a developer on a surface thereof to a development region opposite to an image bearing body, and
- a regulating member biased into contact with the surface of the developer carrier by a predetermined pressure for regulating an amount of developer carried by a developer transport member,
- said developer carrier having a surface coated with fine particles with an average particle size of between 3 and 30 .mu.m bonded with the surface,
- wherein said layer of fine particles contains a styrene polymer.
1 more element
A development system, comprising:
- a developer carrier for carrying a developer on a surface thereof to a development region opposite to an image bearing body, and
- a regulating member biased into contact with the surface of the developer carrier by a predetermined pressure for regulating an amount of developer carried by a developer transport member,
- said developer carrier having a surface coated with fine particles with an average particle size of between 3 and 30 .mu.m bonded with the surface,
- wherein said fine particles contains a benzoguanamine resin and a carbon black.
1 more element
A development system comprising:
- a developer carrier for carrying a developer on a surface thereof to a development region opposite to an image bearing body, and
- a regulating member biased into contact with the surface of the developer carrier by a predetermined pressure for regulating an amount of developer carried by a developer transport member,
- said developer carrier having a surface coated with fine particles with an average particles size of between 3 and 30 .mu.m which are bonded with the surface, said fine particles having a volume resistivity between 10.sup.5 and 10.sup.13 .OMEGA..multidot.cm.
A development system, comprising:
- a developer carrier for carrying a developer on a surface thereof to a development region opposite to an image bearing body, and
- a regulating member biased into contact with the surface of the developer carrier by a predetermined pressure for regulating an amount of developer carried by a developer transport member,
- said developer carrier having a surface coated with fine particles with an average particles size of between 3 and 30 .mu.m which are bonded with the surface, said fine particles having a volume resistivity between 10.sup.5 and 10.sup.13 .OMEGA..multidot.cm,
- characterized by satisfying a condition of 10.ltoreq..vertline.A-B.vertline..ltoreq.80, wherein "A" denotes a shape factor SF-1A of said developer and "B" denotes a shape factor SF-1B of the fine particles.
1 more element
Dependencies are inferred from the claim text.