Process for preparing an inflatable pad for a face mask
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United States of America Patent
Stats
-
Aug 31, 1982
Grant Date -
N/A
app pub date -
Mar 19, 1980
filing date -
Apr 3, 1979
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A method of preparing an inflatable pad for a face mask in which a former (3) is coated with a curable composition which is cured to provide an elastic air-impermeable sheath (4) of rubber or like polymer which does not adhere to the former, thereby defining an inflation chamber. The former comprises a sheet of flexible material, e.g. polymer foam and remains within the pad in use thereby avoiding the conventional operations of slitting the air-impermeable sheath, removing the former and resealing the air-impermeable sheath.
First Claim
Family
International Classification(s)
- Non-US Classification not provided for expired patents
Cited Art Landscape
Patent Citation Ranking
- Citation Ranking not provided for expired patents
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