Gas supply mask apparatus

A gas supply mask apparatus has low possibility that a gas rising in a mask main body will flow out from the upper end and the surrounding vicinity of the mask main body and give discomfort to the eyes of a mask wearer. In this gas supply mask apparatus, an angle formed between a direction in which...

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Bibliographische Detailangaben
Hauptverfasser: Kobayashi, Kenji, Kobayashi, Shinichi, Matsubara, Kazuo, Matsubara, Terumi
Format: Patent
Sprache:eng
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Beschreibung
Zusammenfassung:A gas supply mask apparatus has low possibility that a gas rising in a mask main body will flow out from the upper end and the surrounding vicinity of the mask main body and give discomfort to the eyes of a mask wearer. In this gas supply mask apparatus, an angle formed between a direction in which a gas introduction opening faces and a virtual vertical plane facing right frontways falls within the range of 30° to 60° (preferably, the range of 35° to 55°, and more preferably, the range of 40° to 50°) when the mask main body is viewed right sideways.