Aisan Kogyo Kabushiki Kaisha

Toshio Yoshida

Tsuneyuki Kurata

Norihisa Yamamoto

Yukihiro Kaneda

Masatoshi Moriyama

A canister includes a canister case having an adsorbent chamber, an adsorbent housed in the adsorbent chamber of the canister case, a filter disposed between the adsorbent chamber and a port mounted on an end wall of the adsorbent chamber, and a tentative filter engaging projection provided in the adsorbent chamber. The filter is loosely fitted within the adsorbent chamber and then welded on the end wall of the adsorbent chamber. The tentative filter engaging projection tentatively holds the filter loosely fitted within the adsorbent chamber in a welding step of the filter.

Canisters

In order to aim at shortening the time of refueling by maintaining the function of prevention of discharge of vapor, similar to that of a conventional canister in the case of other than refueling during resting of an engine while the flow resistance in the canister becomes smaller during refueling, there is provided a canister in which a plate is vertically arranged in a chamber charged therein with absorbent in the canister, and filter support pins are projected from opposite surfaces of the plate while filters are arranged at the tip end faces of the filter support pins, and in which a plurality of constriction passages are formed being arranged in a horizontal direction only in the upper part of the plate.

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Handa, Japan

Toshio Yoshida