Canon Kabushiki Kaisha

Yasuko Hayashi

Takeshi Ikeda

Kazuo Yoshinaga

Yoshinobu Baba

Yuichi Hashimoto

Yuko Sato

Hitoshi Itabashi

Katsumi Aoki

Yoshio Kashizaki

Yuzo Tokunaga

Shinya Mayama

Hiroshi Aoto

An electrophotographic photosensitive member is constituted by disposing a photosensitive layer including a charge generation layer and a charge transport layer on an electroconductive support. The charge transport layer has a thickness of at most 12 .mu.m and is formed by dispersing therein particles having a particle size of 1-3 .mu.m at a density of 1.times.10.sup.4 -2.times.10.sup.5 particles/mm.sup.2. The charge transport layer and the particles described above provides a difference in refractive index of at least 0.10. The photosensitive member is effective in providing good images free from black spots and interference fringes and with a good gradation-reproducing characteristic when used as a structural member of a process cartridge and an image forming apparatus.

Electrophotographic photosensitve member and image forming apparatus

A transfer material carrying member is described which has at least two resin-containing layers. The relative dielectric constant (E1) of the surface layer and the relative dielectric constant (E2) of the layer(s) other than the surface layer show a ratio (E1/E2) satisfying the following expression of 0.02.ltoreq.(E1/E2).ltoreq.0.7. The carrying member shows a high transfer efficiency and is able to provide high quality images for a prolonged period of time.

Transfer material carrying member and image-forming apparatus comprising

A carrier for use in electrophotography has carrier particles. The carrier particles each comprise a carrier core particle and a resin for coating the carrier core particle and having a resistivity of 10.sup.10 .OMEGA..multidot.cm or above under conditions of a temperature of 23.degree. C. and a humidity of 50% RH. The carrier particles have an average particle diameter of not larger than 100 .mu.m and a resistivity of 10.sup.10 .OMEGA..multidot.cm or above. The carrier particles comprise not less than 80% by number of resin-coated carrier particles whose carrier core particles are each coated with a resin in a coverage of not less than 90%.

Carrier for electrophotography, process for its production,

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Kawasaki, Japan

Yasuko Hayashi