Mitsubishi Kasei Corporation

Mitsubishi Chemical Industries Limited

Motohisa Aoki

Tadashi Umehara

Ryuuji Nakayama

Yasuo Soyama

Jiro Taguti

Katsuji Sakata

Hironobu Iwanaga

A method for preparing a drum comprising a cylindrical aluminum substrate coated with an electrophotographic photoreceptor having reduced streak defects which comprises forming the cylindrical aluminum substrate by the porthole method using a mold having ceramic surfaces.

Method of preparing cylindrical aluminum substrate for

Method for rotatingly transferring hollow cylindrical articles

A method for holding a hollow cylindrical body without a bottom without contacting the outside surface thereof and immersing the body in a liquid with which the outside surface of the cylindrical body is to be coated and preventing the liquid from contacting the inside wall of the cylindrical body. The method utilizes a device which includes device an inflatable elastic membrane which tightly contacts the inside wall of the cylindrical body so as to hold the body when it is inflated by supply of compressed fluid. The process for producing an electrophotographic element includes the steps of holding the hollow cylindrical body without a bottom, immersing the cylindrical body in a liquid containing a photosensitive material and separating the cylindrical body from the liquid to form a uniform photosensitive layer only on the outside surface thereof.

Method for producing an electrophotographic element

Growing community of inventors

Tokyo, Japan

Motohisa Aoki