Title:
MULTI-LAYER MASK WITH FOLDED SINGLE-LAYERS
Document Type and Number:
WIPO Patent Application WO/2021/249565
Kind Code:
A1
Abstract:
A multi-layer mask with folded single-layers, the mask mainly comprising ear straps (1) on two sides and a filter body (2), wherein the filter body (2) is formed by means of overlapping two or more layers of folded single-layer filter sheets and then sealing the gaps between the layers at four sides thereof. The multi-layer mask with folded single-layers can improve the deformation resistance of the mask and increase the gaps between the layers inside the mask.
Inventors:
WEI GE (CN)
Application Number:
PCT/CN2021/099918
Publication Date:
December 16, 2021
Filing Date:
June 13, 2021
Export Citation:
Assignee:
DAILUGE SHEN ZHEN TECH CO LTD (CN)
International Classes:
A62B23/02; A41D13/11
Foreign References:
| US20060130214A1 | 2006-06-22 | |||
| US6412486B1 | 2002-07-02 | |||
| CN210017972U | 2020-02-07 | |||
| US7290545B2 | 2007-11-06 | |||
| CN2666204Y | 2004-12-29 | |||
| CN2617411Y | 2004-05-26 |
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