Fuji Xerox Co., Ltd.

Toshiaki Murofushi

Shinichiro Saito

Hiroshi Nakazawa

Kazunari Koga

Shigeo Aonuma

Koichi Oyamada

Yoshimi Amagai

Yasuhiro Ohya

Koichi Tanaka

Takashi Imai

Satoshi Inoue

Yasuo Yamamoto

Masanori Ichimura

Michio Take

Susumu Saito

Koji Fukushima

Hideyuki Akagi

Masaru Miura

Takaaki Kimura

Masayuki Takei

Jun Tsuda

Toshinori Nozaki

Akihiko Suzuki

Miharu Endo

Akihito Suzuki

Fumitaka Nakajima

Masaharu Boshu

Taku Kunou

A recycling method of a part for an image forming apparatus, the part being used in the image forming apparatus and provided with a thermoplastic resin member at least in a part thereof is provided which includes: recovering the part for the image forming apparatus; disassembling the recovered part for the image forming apparatus; retrieving the thermoplastic resin member from the disassembled part for the image forming apparatus; and performing heat processing to the retrieved thermoplastic resin member to recycle the member.

Recycling method and recycling apparatus of part for image forming apparatus, and recycled part for image forming apparatus

A recycle developer bearing body which is an effective recycle of a used developer bearing body, helps effective utilization of resources, and does not result in image quality degradation, such as developer concentration unevenness. In the recycle developer bearing body, even when scars or other defects are developed on a developer bearing surface of the developer bearing body from previous use, a surface roughness Ra of the developer bearing surface having the scars or other defects of the developer bearing body is 0.8 &#x3bc;m or more.

Recycle developer bearing body, inspection method and inspection device thereof, method of recycling a developer bearing body, and method of recycling a used process cartridge

A method for regenerating a charging member for an electrophotographic system that is pressed against a surface of a body to charge the body, a charging member and a device for regenerating a charging member are provided. The method includes a step of applying heat treatment to the charging member. A used charging member, whose resistance is not decreased enough to recover a required chargeability by cleaning the surface thereof, can easily be regenerated and reused.

Method for regenerating charging member, charging member and device for regenerating charging member

The invention provides a washing method for a charging member by removing the deposited substance on the surface, thus making the charging member reusable. The washing method, for an electrophotographic charging member to be pressed to the surface of a member to be charged thereby charging the member to be charged, has a step of washing the surface of the charging member at least once with an acidic aqueous solution.

Washing method for charging member

A toner for developing an electrostatic charge image is disclosed, which is formed by adding and mixing an external additive with toner particles having an average particle size of not larger than 9 .mu.m and comprising at least a colorant and a binder resin, wherein the external additive is fine particles having a particle size of 20 to 80 nm. There is also disclosed a process for preparing the toner which comprises adding external additives to the toner particles and mixing them, wherein the addition and mixing of said external additive are carried out under specific conditions.

Toner for developing electrostatic charge image and process for

An electrophotographic two-component system developer is described, comprising a positive charging toner and a negative charging carrier of the dispersed magnetic powder type, wherein a hydrophilic alumina particle is adhered onto the surface of said positive charging toner and a negative charging carrier has a volume average particle diameter of from 30 to 80 .mu.m. The developer provides reduced toner cloud upon development processing and provides toner images free from fog.

Two component electrophotographic developer

A positively chargeable electrophotographic developer is disclosed, comprising a carrier, toner particles positively chargeable by friction with the carrier, fine particles of hydrophilic alumina, and fine particles of one of tin oxide, hydrophobic silica and titanium dioxide. The developer hardly undergoes toner cloud or toner dropping during development and suffers neither extreme deterioration in charging properties nor fog formation even when used for taking a large number of copies.

Electrophotographic developer containing positively chargeable toner

Dry toners for use in electrostatic latent image development comprising a colorant in a resin binder are described, wherein said resin binder comprises a polyester containing --COOH groups in which at least one of the --COOH groups is replaced with nitrogen-containing compounds such as amines, ammonium salts, betaines, pyridinium salts, and azines. These toners are superior in development of negatively charged latent images and exhibit good low temperature fixability.

Dry electrophotographic toner comprising graft copolymer

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Minami-ashigara, Japan

Toshiaki Murofushi