Nichias Corporation

Takahito Isoe

Kanji Hanashima

Katsumi Watanabe

Takashi Nemoto

In order to obtain an extremely good gas sealing property, in a spiral gasket, in which a metal hoop material and a filler material formed approximately in a V-shape in the cross-section are wound in a spiral, superposed on each other, only the hoop material is wound in a spiral without filler material by at least 5 turns at each of the beginning of winding on the inner side and the end of winding on the outer side. In this case there are disposed at least 4 portions fixed by welding at each of the beginning and the end of winding at positions, where the inner periphery and the outer periphery are divided with equal intervals on the inner and the outer side of the gasket body, respectively.

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Tokyo, Japan

Takahito Isoe