Ricoh Company, Ltd.

Eiichi Masushio

Masato Suzuki

Hiroshi Sano

Masayoshi Suzuki

Takashi Ono

Seiji Terazawa

Keiichi Yano

Junji Yamabe

Hideo Ichikawa

Nobuyasu Makino

Masashi Hasegawa

Yusuke Uchida

Fumitoshi Murakami

Teruo Shibata

Tatsushi Umayahara

Kaori Ozeki

A sieving device including a hollow cylindrical body, a filter disposed at a bottom portion of the hollow cylindrical body, and a blade configured to rotate in close proximity to the filter around a rotation axis thereof crossing the filter to thereby stir powder supplied to the hollow cylindrical body.

Sieving device, sieving device for developing device, and powder-charging device

An air classifier contains a cylindrical casing provided with at an upper part thereof a feed port to feed high pressure air and a powder material, an umbrella-shaped center core in the casing, and an umbrella-shaped separator core arranged downstream of the center core in the casing and including an opening at center thereof. The air classifier has a configuration containing a dispersion chamber to disperse the powder material, being surrounded by an inner wall of the upper part casing and the center core, and a classification chamber to classify the powder material into fine and coarse powders by centrifugation, being surrounded by the center core, separator core and inner wall of the casing. In the dispersion chamber provided are a louver ring containing guide slats circularly arranged at regular intervals, and a space encircling the louver ring and serving as flow passage of the air and powder material.

Air classifier

Growing community of inventors

Shizuoka, Japan

Eiichi Masushio