FILTERING FACIAL RESPIRATORY MASK WITH ELEMENT OF STIFFNESS COMPOSITION OF SINGLE WHOLE WITH FILTERING CONSTRUCTIVE ELEMENT Russian patent published in 2017 - IPC A62B23/02

Abstract RU 2635036 C2

FIELD: items for personal use.

SUBSTANCE: mask base has at least one transversely extending stiffener formed by performing an S-shaped (three-fold) fold in the filtering member and permanently bonding its layers to one another, for example by welding. At least one thus formed stiffening element reinforces the structural strength of the mask base when it is opened to the cup-shaped shape and prevents the mask base from being added, which may be caused, for example, by the increased air pressure drop on the mask basis due to the high contaminant or moisture content in the air.

EFFECT: improving the characteristics of the mask.

17 cl, 14 dwg

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RU 2 635 036 C2

Authors

Duffy Dean R.

Dates

2017-11-08—Published

2014-08-21—Filed