Fuji Xerox Co., Ltd.

Shigeru Sadamatsu

Koichi Tanaka

Takayoshi Aoki

Yukihiro Ishii

Kozo Oka

Mutsuo Takenouchi

Kohichi Yamamoto

Toll Nozaki

Masakatsu Kimura

Lyon S Pu

Yoshihisa Ishikawa

Kazuaki Ohmi

A developer for an electrostatic latent image is disclosed, which comprises a carrier powder, a toner powder, and a fine powder that has a particle size smaller than that of the toner powder said fine powder being made of a polymer which is located closer to the carrier side of the triboelectric series than to the toner side. The developer does not cause insufficient cleaning or toner filming on a photoreceptor or electrostatic recording element.

Developer composition for electrophotography comprising fine particles

A developer for an electrostatic latent image is described, which comprises a toner powder and a fine powder having a particle size smaller than that of the toner powder, said fine powder being made of a polymer obtained by soap-free emulsion polymerization.

Developer and toner composition produced by emulsion polymerization

A developer for an electrostatic latent image is disclosed, which comprises a toner powder and a fine powder of an acrylic homopolymer or copolymer having an average particle size smaller than that of the toner powder. The developer can be easily cleaned off without causing damage to a latent image-forming member.

Electrophotographic developer comprising toner particles and acrylic

A one-dimensional image sensor such as may be used in scanning an original document for use in a copying system and a method for producing the sensor. Integrated drive circuit elements are formed in a relatively small region of a monocrystalline semiconductor substrate. Lead electrodes are formed on the surface of the substrate diverging outwardly from the drive circuit elements. The lead electrodes have at end portions picture element size belt-shaped electrodes. A photoconductive non-crystalline film is formed over the belt-shaped electrodes with a wide transmissive electrode layer provided over the photoconductive non-crystalline film layer.

One-dimensional image sensor

A photosensitive element for electrophotography comprising an electrically conductive backing member, a photoconductive layer overlying the backing member, and a transparent electrically insulating surface layer on the photoconductive layer, wherein the transparent electrically insulating surface layer contains a charge-retentive material or a layer of a charge-retentive material is interposed between the photoconductive layer and the transparent electrically insulating surface layer so as to form a charge-retentive layer in the boundary between the photoconductive layer and the transparent electrically insulating layer.

Photosensitive element for electrophotography

An electrophotographic member in which a photoconductive layer and a protective layer are superposed in order on a photoconductive support, wherein the improvement comprises:

Electrophotographic member with metallocene containing overlayer

A xerographic developer including 2 to 10% by weight of abrasive particles having a diameter of 100 to 800.mu., exhibiting no electrophotographic developing effect, substantially no frictional charging, having a low toner retention capacity, and as much fluidity as the carriers employed. Such particles improve the charging properties of the carriers, prevent the attachment or adherence of the toner to the machine parts, improve the surface potential of the light-sensitive member, and lessen or eliminate the deterioration of the light-sensitive member due to the 'deletion phenomenon'.

Dry electrophotographic developers

In an electrophotographic process for the formation of an electrostatic latent image on a photosensitive element for electrophotography produced through the sequential lamination on an electrically conductive substrate of an electrically insulating layer, a photoconductive layer, and an electrically insulating surface layer by repeating a series of steps comprising a first charging; a light exposure of the entire surface; a second charging of a polarity opposite to that of the first charging; and an image-wise exposure to light, wherein the polarity between the first electrical charging and the second electrical charging is changed from positive to negative and vice versa simultaneously (either a positive image or a negative image can be obtained from an original using the same developer).

Electrophotographic process

A photosensitive material for electrophotography comprising a support having thereon a photoconductive layer and an electrically insulating layer, in which the photoconductive layer is a vacuum-deposited film substantially comprising Se with a surface layer portion of the vacuum-deposited film contacting the electrically insulating layer containing, within a thickness of about 10 .mu. or less, about 1 to about 50% by weight of As and/or Te and about 0.5 to about 1000 ppm of at least one element of Group IIIb of the Periodic Table.

Layered photoconductive element having As and/or Te doped with Ga, In or

A method for developing a latent image bearing member comprising applying a developer thereto, the developer including a toner comprising a pulverized, colored vinylic polymer resin polymerized by adding to the monomer thereof a crosslinking agent 0.005 - 20% by weight of the monomer and a molecular weight control agent 0 - 20% by weight of the monomer.

Developing method utilizing pulverized, colored, crosslinked, vinylic

An electrophotographic copying machine having a cleaning blade with a cleaning surface coated with a material having a friction coefficient less than 0.8 with respect to the surface of the photosensitive member of the machine, the blade having a tensile elasticity of 0.01 to 10 Kg/mm.sup.2 and the cleaning surface thereof facing the direction of advance of the photosensitive member.

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Kanagawa, Japan

Shigeru Sadamatsu