Canon Kabushiki Kaisha

Toshirou Uchida

Arihiro Yamamoto

Masahiro Watanabe

Hidekazu Matsuda

Kenya Terada

Hisao Kato

Syoji Inoue

Tomoya Kawakami

Masanori Yokoyama

Youhei Ikeda

Masaaki Kimura

Saki Sudo

An electrophotographic cleaning blade, which includes the following: an elastic member containing polyurethane; and a support member supporting the elastic member, and cleaning a surface of a member to be cleaned in motion, by contact of part of the elastic member against the surface of the member to be cleaned, wherein the elastic member has, at least on the tip side, a plate shape having a main surface facing the member to be cleaned and a leading end surface that forms a tip side edge together with the main surface, and a coefficient of variation of area ratios of white regions in each of sections of a binarized image created from grayscale phase image obtained from the leading end surface, is 20.00 or less, and a value of HM-HMis larger than 0.10 N/mm.

Electrophotography cleaning blade, process cartridge, and electrophotographic image formation device

The present invention is aimed at providing an electrophotographic cleaning blade that has excellent chipping resistance and can exhibit excellent cleaning performance. This cleaning blade is provided with an elastic member that includes a polyurethane and a support member that supports the elastic member, and cleans the surface of a member to be cleaned that is moving, by bringing a part of the elastic member into contact with the surface of the member to be cleaned. The average value of the elastic modulus of the elastic member obtained when measured using SPM is at least 15 MPa and not more than 470 MPa, and the coefficient of variation thereof is not more than 6.0%.

Electrophotographic cleaning blade, process cartridge, and electrophotographic image forming apparatus

Growing community of inventors

Shizuoka, Japan

Toshirou Uchida