Title:
NOVEL FILTER SHEET
Document Type and Number:
WIPO Patent Application WO/2021/223691
Kind Code:
A1
Abstract:
A novel filter sheet, comprising a filter sheet body; the filter sheet body is provided with a suspension structure, the middle portion of the filter sheet body is a region for filtering breathed air, and the filter sheet body is suspended, by means of the suspension structure, on a face frame or a mask used for compressing the filter sheet body, and a hanging string or an elastic cord of the face frame or the mask fits the head so as to wear the filter sheet body. Another novel filter sheet, comprising a filter sheet body; a fixing structure is provided at an edge of the filter sheet body so as to prevent a gap from being formed between the filter sheet body and a mask caused by the displacement of the whole or a part of the filter sheet body relative to the mask, and the middle portion of the filter sheet body is a region for filtering breathed air. By developing a novel filter sheet for matched use with a face frame or a mask, the filter sheet tightly seals the face, and such filter sheet is provided with no metal strip or hanging string, thus greatly increasing the production capacity of such filter sheet, and also reducing costs.
Inventors:
XIONG CHANGLUN (CN)
Application Number:
PCT/CN2021/091794
Publication Date:
November 11, 2021
Filing Date:
May 01, 2021
Export Citation:
Assignee:
SHENZHEN NANI TECH CO LTD (CN)
International Classes:
A62B23/02; A41D13/11; A62B7/10; A62B18/02
Foreign References:
| CN111743245A | 2020-10-09 | |||
| CN111214772A | 2020-06-02 | |||
| CN205337714U | 2016-06-29 | |||
| CN212488624U | 2021-02-09 | |||
| CN203748715U | 2014-08-06 | |||
| CN201898908U | 2011-07-20 | |||
| CN205659283U | 2016-10-26 | |||
| JP3213767U | 2017-11-30 |
Download PDF: