Canon Kabushiki Kaisha

Shoji Umehara

Shozo Ishikawa

Masakazu Matsumoto

Takao Takiguchi

Masataka Yamashita

Kiyoshi Sakai

Kazuo Kishino

Masahito Omata

Minoru Mabuchi

Tetsuo Arita

Takeshi Miyazaki

Kazuharu Katagiri

Shuichi Tetsuno

Yasuaki Murai

Katsuhisa Matsunaka

Hajime Miyazaki

Akeshi Asaka

Yoshio Kashizaki

Katsunori Watanabe

Yusuke Baba

Yoji Tomoyuki

Masayuki Onuma

A rotatable fixing member includes an elastic layer, a primer layer provided on the elastic layer, and a parting layer provided on the primer layer. The primer layer contains a crystalline fluorocarbon polymer having a functional group and has a thickness of 850 nm or less. The parting layer is a coating layer of a crystalline fluorocarbon polymer.

Rotatable fixing member, manufacturing method thereof and fixing device

A fixing roller of an image fixing apparatus has an elastic layer on a core metal and has a thermal conductive fluororubber latex layer containing a mixture of fluororubber, fluororesin and thermal conductive fillers more outer side than the elastic. An intermediate layer made of silicone rubber having higher thermal conductivity than the thermal conductive fluororubber latex layer is provided between the thermal conductive fluororubber latex layer and the elastic layer, and the intermediate layer is configured so that an elastic parameter Y(=H&#xd7;T) satisfies a relational expression:Y&#x2267;4200

Roller for fixing and image fixing apparatus using roller for fixing

Disclosed herein are a coloring compound represented by the general formula:A-L-X-L-B&#x2003;&#x2003;(1)wherein A is a coloring moiety, B is a stabilizing moiety having fading-preventing ability, Land Lare linkers for linking A, X and B by covalent bonding and denote, independently of each other, any group of &#x2014;O&#x2014;,&#x2014;CO&#x2014;, &#x2014;OCO&#x2014;, &#x2014;NR&#x2014; (in which Ris a group selected from hydrogen, alkyl, aryl and aralkyl groups), &#x2014;NHCO&#x2014;, &#x2014;NHCOO&#x2014;, &#x2014;NHCONH&#x2014;, &#x2014;NHCSNH&#x2014;, &#x2014;SO&#x2014;, &#x2014;SO&#x2014;, &#x2014;SONH&#x2014;, &#x2014;S&#x2014;, &#x2014;SS&#x2014; and &#x2014;CH&#x2014;, with the proviso that Land Lare not &#x2014;CH&#x2014; at the same time, and X is a spacer moiety and denotes any group of an alkylene group having 1 to 10 carbon atoms, an alkenylene group having 2 to 10 carbon atoms, an alkynylene group having 2 to 10 carbon atoms, an alkoxyalkylene group having 1 to 10 carbon atoms, a cycloalkylene group having 5 to 7 carbon atoms, an arylene group having 6 to 10 carbon atoms and a pyranose type saccharide having 1 to 7 saccharide units, and a recording material using the coloring compound as a coloring material.

Coloring compound and recording material using the same

A process for synthesizing an N,N-disubstituted hydrazone comprises carrying out nitrozation by adding an aqueous solution of sodium nitrite to a solution having one part by weight of an N,N-disubstituted amine dissolved in 3 to 30 parts by weight of an organic acid, then reducing the nitrozated product to an N,N-disubstituted hydrazine by adding a reducing agent to the mixture containing the nitrozated product, and thereafter adding to the mixture containing the N,N-disubstituted hydrazine a carbonyl compound of the formula: ##STR1## wherein A represents an aromatic hydrocarbon group or an aromatic heterocyclic group which may have a substituent, B represents a hydrogen atom, an alkyl group, an aryl group or an aromatic heterocyclic group, which may have a substituent, thereby performing condensation of the N,N-disubstituted hydrazine with the carbonyl compound.

Process for synthesis of N,N-disubstituted hydrazone

An electrophotographic photosensitive member has a photosensitive layer on an electroconductive support, characterized in that the photosensitive member contains an azo pigment having an organic residue represented by the formula (I).

Electrophotographic photosensitive member comprising aromatic azo

A function separated type electrophotographic photosensitive member for infrared rays comprises a combination of a charge generation material and a charge transport material, wherein the electrophotographic photosensitive member for infrared rays contains as the charge generation material a disazo pigment represented by Formula (1).

Function separated photosensitive member having a diphenylamine

An electrophotographic photosensitive member comprises a photosensitive layer on a substrate, said photosensitive layer comprising a disazo pigment represented by the formula (1).

Electrophotographic photosensitive member containing disazo compound

A photosensitive member for electrophotography comprising a photosensitive layer containing an azo pigment selected from those represented by the following formulas (1)-(6): ##STR1## wherein R is an alkyl, aralkyl, aryl, or acyl each capable of having a substituent; Ar is an arylene or heterocyclic group each capable of having a substituent; Ar is a coupler residue group having a phenolic OH group; B is hydrogen, nitroso, or an alkyl, aralkyl, aryl or acyl group capable of having a substituent; and n is 0 or 1.

Photosensitive member for electrophotography

An electrophotographic photosensitive member comprises a photosensitive layer containing an azo pigment selected from the following general formulae (1) to (5): ##STR1## wherein groups Ar are arylene groups and divalent heterocyclic groups, each of which may contain a substituent; n is 0 or 1; and group A is a coupler residue group having a phenolic OH group.

Trisazo photsensitive member for electrophotography

This invention relates to an electrophotographic photosensitive member utilizing a novel electrophotographic photosensitive material, more particularly to an electrophotographic photosensitive member endowed with high sensitivity as well as excellent potential stability during repeated copying by incorporating an azo pigment having a specific molecular structure in the photosensitive layer.

Electrophotographic photosensitive member comprising disazo pigment

An electrophotographic photosensitive member comprises a photosensitive layer containing an azo pigment selected from the general formulae (1) to (6).

Photosensitive member for electrophotography comprising azo pigments

An organic film comprising at least one compound of the following formulae (1)-(5): ##STR1## wherein R.sub.11 and R.sub.13 each represent substituted or unsubstituted aryl, R.sub.12 represents substituted or unsubstituted arylene, and A.sup..crclbar. represents an anionic residue; ##STR2## wherein R.sub.21, R.sub.22, and R.sub.24 each represent substituted or unsubstituted aryl, R.sub.23 represents substituted or unsubstituted arylene, and A.sup..crclbar. represents an anionic residue; ##STR3## wherein R.sub.31, R.sub.33, and R.sub.35 each represent substituted or unsubstituted aryl, R.sub.32 and R.sub.34 each represent substituted or unsubstituted arylene, and A.sup..crclbar. represents an anionic residue; ##STR4## wherein R.sub.41 represents alkyl, substituted or unsubstituted phenyl, or substituted or unsubstituted styryl, R.sub.42 represents substituted or unsubstituted arylene, R.sub.43 represents substituted or unsubstituted aryl, and A.sup..crclbar. represents an anionic residue; and ##STR5## wherein R.sub.51 represents alkoxy, R.sub.52 represents alkyl, R.sub.53 represents substituted or unsubstituted arylene, R.sub.54 represents substituted or unsubstituted aryl, A.sup..crclbar. represents an anionic residue, and n represents an integer of 1 or 2.

Recording medium and process employing a photosensitive organic film

An organic photoconductive material represented by the formula ##STR1## wherein A is an atomic group necessary for completing a substituted or unsubstituted aromatic hydrocarbon ring, Ar is a substituted or unsubstituted group, and Cp is a coupler residue.

Growing community of inventors

Fuchu, Japan

Shoji Umehara