Kabushiki Kaisha Toukai Spring Seisakusho

Nagase Co., Ltd.

Filtration Systems, Inc.

Nagase & Co., Ltd. and Kabushiki Kaisha Toukai Spring Seisakusho

Syoichi Yasue

Keiichi Murakami

Disclosed is a hub ring for a filter wherein a supporting member having a plurality of supporting portions is interposed between a pair of keep plates, a supporting plate for a filter wherein a plurality of wave portions extending substantially in the circumferential direction are arranged in the radial direction, and methods for manufacturing these members. The hub ring has a great opening ratio to achieve a low pressure loss property and causes substantially no residence of polymer, and the hub ring can be manufactured at a low cost. The supporting plate has high pressure resistance, low-pressure loss property, good directivity of polymer flow and excellent polymer mixing effect, and it is suitable for use as a retainer disposed inside of a filter.

Hub ring and supporting plate for a filter

Hub ring and supporting plate for a filter and methods for manufacturing

A method for manufacturing a supporting plate provided inside of a disc-type filter having filter media at surface portions thereof including the steps of: forming an annular plate having opposed surfaces; and

Method for manufacturing a supporting plate for a filter

A method for manufacturing a hub ring provided on at least one of inner and outer circumferences of a disc-type filter including: forming a plurality of slits on an annular plate having a central opening at a position on one of inner and outer circumferential edge portions of the annular plate, the plurality of slits being arranged over the entire length of one of the inner and outer circumferential edge portions, each of the plurality of slits extending in a radial direction of the annular plate; twisting portions positioned between respective adjacent slits substantially at an angle of 90 degrees relative to the annular plate to form an annular supporting member; and disposing a pair of keep plates over and under the twisted portions of the annular supporting member, each of the pair of keep plates being formed as an annular plate. The hub ring has a great opening ratio to achieve a low pressure loss property and causes substantially no residence of polymer, and the hub ring can be manufactured at a low cost. The supporting plate has high pressure resistance, low-pressure loss property, good directivity of polymer flow and excellent polymer mixing effect, and it is suitable for use as a retainer disposed inside of a filter.

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Minokamo, Japan

Syoichi Yasue