Kyocera Corporation

Other

Yukio Ikeda

Yoshio Ozawa

Katsuhiro Yoshioka

Hiroshi Itoh

Yasuo Nishiguchi

Takao Kawamura

Hiroyoshi Tode

Norio Tomiie

A suction unit comprises reciprocating change-over suction device including tubular body having with passage and two branch passages and bifurcated from passage connected to a suction apparatus. Cylinder is movable in body and has ventilation passages and and actuation plates and fixed to ends of cylinder . Chambers and are connected to the end portions of body with closing members closing openings of the chambers. Elastic containers and are contained in chambers and , openings of these containers being fixed to inner surfaces of closing members and . Closed valves and are on chambers and and suction tubes and are connected to inflow passages and of members and and, at another end, are connected to common suction tube . Discharging tubes and are connected to outflow passages and of members and and, at another end, to storage container

Suction unit for medical applications

To form sharp image free from flow of image or fog with an electrophotographic apparatus, which uses an a-Si photo-sensitive drum charged uniformly by having resort to the discharge phenomenon, the electrophotographic apparatus comprises an electrophotographic photo-sensitive drum having a surface layer being represented by an elementary ratio composition formula ( a-Si.sub.1-x C.sub.x :H ), x being 0.95.ltoreq..times.&lt;1, the dynamic indentation hardness of the upper surface layer being 300 kgf/mm.sup.2 or below, the hardness of said surface layer being higher on the inner side of said photoconductive layer than on the outer surface side, preferably being gradually increasing as one goes toward the inner side of said photoelectric layer from the outer surface side, and a developing unit using a developer composed of carrier and toner particles being caused to rub the drum surface and recovered said developer in a developer vessel. The temperature of said photosensitive drum surface and said developer vessel being held in a range 0 to +10.degree. C., the developer used for the development contained a conductive abrasive having a volume resistivity ranging from 10.sup.2 to 10.sup.10 .OMEGA..multidot.cm, the peripheral speed of a transfer roller is set to be slightly higher than the peripheral speed of the drum.

Electrophotographic apparatus

An electroconductive magnetic carrier which is composed of carrier particles, each of the carrier particles comprising a basic particle in which magnetic particles with an average particle diameter of 0.05 to 1.0 .mu.m are dispersed in a binder resin, and electroconductive finely-divided particles with an average particle diameter of 0.5 .mu.m or less which are fixed on the surface of said basic particle to form a carrier particle with an average particle diameter of 5 to 100 .mu.m; a developer which is composed of the above electroconductive magnetic carrier and an electrically insulating toner; and an image formation method of forming toner images on a photoconductor by using this developer are described.

Electroconductive magnetic carrier, developer using the same and image

An electroconductive magnetic carrier which is composed of basic particles, each of the basic particles comprising a binder resin and a magnetic material dispersed in the binder resin, and an electroconductive layer formed on the surface of the basic particle, a developer which is composed of the above electroconductive magnetic carrier and (b) an electrically insulating toner, and an image formation method of forming toner images on a photoconductor by using this developer are described.

Growing community of inventors

Watarai, Japan

Yukio Ikeda