Canon Kabushiki Kaisha

Atsushi Noguchi

Kazuhito Wakabayashi

Masayoshi Shimamura

Satoshi Otake

Minoru Ito

Takuma Matsuda

Hironori Mori

Yasutaka Akashi

Kineo Takeno

Yasutaka Akahashi

Yoshitaka Ishioka

Provided is a developer carrying member that can stably form a high-quality electrophotographic image. The developer carrying member includes an electroconductive support and a surface layer in the stated order, wherein the surface layer contains a binder resin and electroconductive particles, and a content of the electroconductive particles in a region from a surface of the surface layer opposite to an outer surface thereof on a side facing the electroconductive support to a depth of 150 nm is 1% or more and 25% or less, and wherein the surface layer has a volume resistivity of 1.0&#xd7;10&#x3a9;&#xb7;cm or more and 1.0&#xd7;10&#x3a9;&#xb7;cm or less.

Developer carrying member, process cartridge, and electrophotographic image forming 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. 

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

An image display apparatus includes first and second substrates, an electron emitting device, light emitting members, and a spacer located between the first and second substrates. Straight-line ribs higher than the light emitting members are formed on the second substrate with one of the lines of light emitting members interposed between each adjacent pair of ribs. The spacer extends in a second direction intersecting a first direction in which the ribs extend, and is located between the light emitting members adjacent to each other in the first direction. The ribs include first and second ribs, and each first rib includes a wide portion where it intersects the spacer, the wide portion having a large width in the second direction and being higher than parts of the second ribs intersecting the spacer, at least one of the second ribs being disposed between each adjacent pair of first ribs.

Growing community of inventors

Numazu, Japan

Atsushi Noguchi