Konica Corporation

Isao Endou

Satoshi Haneda

Hiroshi Yamazaki

Hiroyuki Nomori

Satoru Ikeuchi

Yuki Okuyama

Yoshiaki Koizumi

A developing apparatus includes a control electrode assembly provided in an upstream portion of a developing area of a developing sleeve that is opposed to an image retainer. The control electrode assembly is provided with an insulating member so that it can be located close to the developing sleeve or it can be contacted with the developing sleeve. An end portion of the control electrode is protruded onto a downstream side with respect to an end portion of the insulating member so that a toner cloud can be generated immediately before the developing area.

Developing apparatus

A toner for electrostatic image developing is disclosed. It is prepared by giving a mechanical impact force to radically polymerized particles containing a colorant and a low molecular weight polyolefine so as to have the low molecular weight polyolefine exist at a ratio of 5 to 40% by number on a surface of the particles. The toner has a uniform and good electrification property, high fixability and no offsetting property.

Toners for developing electrostatic images

Growing community of inventors

Kawasaki, Japan

Isao Endou