Fuji Electric Co., Ltd.

Yoji Yamada

Hiroshi Kimura

Noriaki Kawata

Shinichi Tamura

Tadashi Mimura

Yasushi Iguchi

Tadashi Asakawa

The present invention relates to photoconductors which exhibit excellent electrical properties which are not appreciably affected by environmental changes or by repeated use. Having excellent durability during repeated printing, these photoconductors can be used to obtain large quantities of high-quality output images. The photoconductor according to the invention includes a conductive substrate and a photoconductive film on the conductive substrate. The photoconductive film includes a plurality of charge generation and transport layers, wherein each layer contains a phthalocyanine compound described in the specification by chemical formula (I) as a charge generation agent and a charge transport agent dispersed or dissolved into a binder. The concentration of the charge generation agent in an upper layer is higher than in a lower layer.

Photoconductor for electrophotography

A direct heating type toner fixing roller for electrophotographic apparatuses is composed of a cylindrical tube made of a resin into which are mixed electrically conductive additives, preferably carbon fiber and carbon black powder. The resin is injection molded under defined conditions so that a reverse crown profile is formed. The roller of the invention is held in place at the toner fixing position by shafts, and the shafts themselves are supported by flanges. Electric power is supplied to the cylindrical tube to heat the tube to a predetermined thermal toner-fixing temperature through power supply terminals in contact with electrically conductive flanges. Alternately, the power supply terminals may make direct contact with peripheral parts of the cylindrical tube to heat the tube.

Roller for fixing toner and method for manufacturing same

Growing community of inventors

Nagano, Japan

Yoji Yamada