Ishigaki Company Limited

Ishigaki Mechanical Industry Co., Ltd.

Yukitoshi Mitani

Eiichi Ishigaki

Kazuhisa Otani

Nobuo Honda

Filter plate for a filter press

A screw press apparatus has frames, a screw shaft, an outside tube, a cylindrical screen, a screw blade, a supply pipe, and a cleaning pipe. The screen is fixed between the frames to the outside tube, and has a plurality of fine holes and covers the screw shaft. The screw shaft and the screen define a cylindrical space continuously extending from an upstream region to a downstream region. Raw liquid is fed from the supply pipe via an opening of the screw shaft to the upstream region of the cylindrical space. The cleaning pipe ejects cleaning water onto the screen. Sizes of the fine holes of the screen decrease gradually from the upstream region towards the downstream region.

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Kagawa, Japan

Yukitoshi Mitani