Ricoh Company, Ltd.

Hideki Akiyoshi

Hiroshi Tamura

Yutaka Koizumi

Hidetoshi Yano

Atsushi Kutami

Hideaki Ema

Junichiro Hashimoto

Satoshi Otomura

Hideyo Nishizima

Izumi Aiso

Yoshihiro Takada

An improved electrophotographic photoconductor is disclosed, which comprises a cylindrical electroconductive support and a photoconductive layer formed on the electroconductive support, which electroconductive support comprises a base support made of a phenol resin with the releasing rate of ammonia therefrom per 48 hours being 50 ppm or less.

Electrophotographic photoconductor having cylindrical base support of

A wide seamless endless belt. A belt comprising a wide seamless endless-belt-like sheet metal 10 to 50 .mu.m, and a lining layer made of flexible material provided on the inside surface thereof and carrying a mechanical force required for belt. This endless belt is used as a substrate of a photosensitive belt for an electrostatic photographic copying machine.

Endless belt

An electrode for use with an electrophotographic photoconductor comprising a non-aluminum metal layer and an aluminum layer which are successively formed on a substrate, thereby constituting a double-layered electrode, and an electrophotographic photoconductor including the double layered electrode are disclosed.

Dual layer electrode used with electrophotographic photoconductor

This invention relates to a layered type photosensitive material for electrophotography, which comprises a charge generating layer and a charge transfer layer on an electroconductive substrate, characterized by containing a trivalent organic phosphite compound as an agent for preventing light-degradation.

Photosensitive material for electrophotography contains organic

An electrophotographic photoconductor comprising an electroconductive base and a photosensitive layer formed thereon, the photosensitive layer comprising a selenium-tellurium alloy with a concentration of tellurium in the range of 5 to 20 wt. % and halogen, with a concentration in the range of 5 to 500 ppm, selected from the group consisting of fluorine, chlorine, bromine and iodine, in the photosensitive layer, with the concentration of tellurium substantially uniform or increasing in the direction toward the surface of the photosensitive layer and the ratio of the concentration of tellurium near the electroconductive base to the concentration of tellurium near the surface of said photosensitive layer being 65 or more:100.

Growing community of inventors

Numazu, Japan

Hideki Akiyoshi