Minolta Camera Kabushiki Kaisha

Minolta Company, Ltd.

Powdertech Co., Ltd.

Yukio Tanigami

Mitsutoshi Nakamura

Ichiro Demizu

Yasuki Nagai

Hideaki Ueda

Shuji Iino

Masahiro Anno

Junji Machida

Eiichi Sano

Makoto Kobayashi

Yuji Sato

Toshio Honjo

Toshitaro Kohri

Junji Ohtani

Osamu Maeda

Yuji Shintani

Etsuaki Urano

Shinobu Nakasawa

Toshiyuki Fukumoto

Osamu Doi

Kazuhiro Itadaki

Miyoko Ito

Nobutaka Torii

The present invention provides a carrier comprising:

Carrier for electrophotography with surface coated with specified

A toner for electrostatic latent image developing comprises a binder resin and a coloring agent. The binder resin is preferably a polyester resin having specified properties. The coloring agent is preferably a C. I. Pigment Blue 15-3, C. I. Pigment Red 122 or C. I. Pigment Yellow 17. The toner is prepared by emulsion dispersion of a colored resin solution, including the binder resin and the coloring agent in a non-water soluble organic solvent, in an aqueous dispersion. Subsequently, the non-water soluble organic solvent and the aqueous dispersion are removed to produce fine toner particles, which are washed, dried and sorted to produce the toner.

Toner for electrostatic latent image developing

A resin-formed toner for developing electrostatic latent images manufactured by a wet process, wherein 10 parts by weight of said toner is added to 100 parts by weight of deionized water to produce a solution having electrical conductance of 1.about.100 .mu.S/sec. And a resin-formed toner for developing electrostatic latent images which is manufactured by wet process using a water-insoluble inorganic salt comprising calcium as a dispersion stabilizing agent, wherein the amount of calcium present in the toner is 0.2.about.10 ppm.

Toner for electrostatic latent image developing and manufacturing method

A toner for electrostatic latent image developing containing at least a binder resin, a coloring agent and a charge controller that are dissolved or dispersed in a non-water soluble organic solvent to form an emulsion dispersion of a colored resin solution in aqueous dispersion. The toner of the present invention is produced by forming the emulsion dispersion of a colored resin solution in aqueous dispersion followed by removal of the non-water soluble organic solvent and water to obtain a toner having a residual organic solvent content of about 5 to about 100 ppm and a residual moisture content of about 0.05 to about 1.0 percent-by-weight of total toner weight.

This invention relates to a carrier for developing electrostatic latent images comprising;

Carrier for developing electrostatic latent image

The present invention provides a carrier coated by a polymer particle layer containing fine magnetic particles around a magnetic core, which may contain an electrical charge controlling agent, and the core may be pre-treated with a coupling reagent; the carrier gives excellent clearness to the copy and durability at repeating use.

Carrier for use in developing device of electrostatic latent image and

The present invention relates to a photosensitive member which includes a photoconductive layer of amorphous silicon and an insulating layer formed thereover and including amorphous silicon, carbon and an element in Group III A of the Periodic Table. Carbon is included in an amount of about 35 to 65 atomic % at the outer most surface of the insulating layer and a minimum amount at the interface with the photoconductive layer. The Group III A element is included to control a majority carrier of the insulating layer to be a polarity opposite to the polarity of charging.

Photosensitive member with an insulating layer of amorphous silicon

The present invention relates to a photosensitive member having a photoconductive layer of amorphous silicon. On the photoconductive layer, an amorphous silicon insulating layer is formed and this layer includes carbon and an element in Group IIIA of the Periodic Table. The Group IIIA element is included to control the conductivity of the insulating layer in such fashion that the majority carrier thereof is opposite in polarity to the charging polarity.

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Amagasaki, Japan

Yukio Tanigami