Nitto-denko Corporation

Kubota Corporation

Metcal, Inc.

Takashi Tago

Hideki Kasa

Youzou Yano

Akio Suzuki

Masayuki Sakaguchi

Junsuke Kyomen

Eizo Kawano

Takatomo Harada

Yuichiro Goto

Shigeru Okusaka

The present invention provides filter units that, when joined together, allow joining portions thereof to be fixed together satisfactorily and can prevent air from leaking at the joining portions. A filter unit includes a filter medium that has been pleated and a frame that supports the circumference of the filter medium. The frame has a protruding part on at least one face selected from an upper face and a lower face thereof, with the protruding part being formed by allowing a part of the at least one face to protrude. The upper face is a surface of the frame that faces the upstream side relative to the flow of air that passes through the filter medium, and the lower face is a surface of the frame that faces the downstream side relative to the flow of air.

Filter unit and filter unit panel

Disclosed are a first vent filter member which includes: an elastomer member made of a thermoplastic elastomer to which a water-repellent film can be fixed by fusion and having a cylindrical form whose one end part serves as an opening for insertion of a mounting part of a base; a water-repellent film thermally fusion-bonded to the other end part of the elastomer member; and a covering cap which protects the water-repellent film and has been fitted and fixed to the elastomer member in such a manner that a vent passageway is formed between the elastomer member and the covering cap, and a second vent filter member which includes: an elastomer member made of a thermoplastic elastomer to which a water-repellent film can be fixed by fusion and having a disk form which has on one side thereof a tapered insertional part to be inserted into a mounting part, is blocked on the other side with a mist barrier cover, and has a sealing/fixing part on the outer periphery thereof and a vent passageway extending from said one side to the outer periphery of said other side; and a water-repellent film fixed by fusion to the elastomer member somewhere in the vent passageway so as to block the vent passageway therewith. These vent filter members can be easily mounted, are less apt to suffer a decrease in breathing function caused by watertightness and water-repellent-film fouling, and are highly reliable.

Vent filter member

Plastic pipe and manufacturing method thereof

Method of manufacturing and joining electro-fusion fitting

Growing community of inventors

Osaka, Japan

Takashi Tago