Canon Kabushiki Kaisha

Hironori Mori

Masayoshi Shimamura

Satoshi Otake

Minoru Ito

Kazuhito Wakabayashi

Takuma Matsuda

Atsushi Noguchi

Yasutaka Akashi

Akinori Sato

Yosuke Ata

Masahiro Inami

Katsumi Otani

Yasutaka Akahashi

Provided that a process for manufacturing an elastic roller having a mandrel and a coating film. The process comprise a first step of forming a coating film on an outer peripheral surface of a first mandrel, and a second step of forming a coating film on an outer peripheral surface of a second mandrel. The process further comprises a cleaning step between the steps. The cleaning step comprising: making a cleaning member arranged coaxially with the central axis of a circular coating head, in a downstream side in a moving direction of the first mandrel with respect to the circular coating head, making the cleaning member relatively approach the circular coating head; bringing a surface to be cleaned into contact with the cleaning member; rotating the cleaning member while the surface comes in contact with the cleaning member; and inserting the cleaning member into the center hole.

Process for manufacturing elastic roller, and coating apparatus

A developer carrying member is provided the surface layer of which can make a developer stable by controlling its triboelectric charging strongly and which can maintain a high image quality over a long period of time even where a developer made highly spherical-particle or a small-particle developer is used. The developer carrying member has a substrate and a surface layer. The surface layer is a cured product of a resin composition containing a binder resin, conductive particles, a quaternary ammonium salt and an azo metal complex compound, the binder resin has in the molecular structure at least one structure selected from the group consisting of an &#x2014;NHgroup, an &#x2550;NH group and an &#x2014;NH&#x2014; linkage, and the azo metal complex compound is a compound represented by the formula (1) as defined in the specification.

Developer carrying member, process for its production, and developing assembly

A developer carrying member is provided which can maintain a high image quality over a long period of time even where a highly triboelectrically chargeable developer is used. The developer carrying member has a substrate and a surface layer. The surface layer is a cured product of a resin composition containing a binder resin, conductive particles, a quaternary phosphonium salt and an azo metal complex compound, the binder resin has in the molecular structure at least one structure selected from the group consisting of an &#x2014;NHgroup, an &#x2550;NH group and an &#x2014;NH&#x2014; linkage, and the azo metal complex compound is a compound represented by the formula (1) as defined in the specification.

Provided is a developer carrying member that can stably provide a negatively chargeable developer with triboelectric charge and whose surface hardly wears even after its long-term use. The developer carrying member is a developer carrying member, comprising: a substrate; and a surface layer, wherein: the surface layer contains a matrix resin and electro-conductive particles; and the matrix resin contains a crosslinked product of a polymer chain having units represented by the following structural formula (1) and the following structural formula (2), and a polymer chain represented by the following structural formula (3). 

Developer carrying member and developing unit

A developer carrying member having less environmental dependence is provided. The developer carrying member has a substrate and a resin layer, which resin layer contains an acrylic resin; the acrylic resin having a unit (1) represented by the following formula (1) and a unit (2) represented by the following formula (2). In the formula (1), Rrepresents a hydrogen atom or a methyl group, Rrepresents an alkylene group having 1 to 4 carbon atoms, and an asterisk * represents the part of linkage to the part shown by a double asterisk ** in the formula (2). In the formula (2), Rrepresents a hydrogen atom or a methyl group; Rrepresents an alkylene group having 1 to 4 carbon atom(s); R, Rand Reach represent an alkyl group having 1 to 18 carbon atoms; Arepresents an anion. 

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Mishima, Japan

Hironori Mori