Process for preparing an inflatable pad for a face mask

Details Process for preparing an inflatable pad for a face mask Process for preparing an inflatable pad for a face mask

1980-03-19

1982-08-31

Lawrence, Evan K.

Plastic and nonmetallic article shaping or treating: processes

With printing or coating of workpiece

Anti-stick or adhesion preventing coating

264264, 2642791, 264307, 4274301, B29H 3042

Patent

active

043472052

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.

REFERENCES:
patent: 2373529 (1945-04-01), Beal
patent: 4263237 (1981-04-01), Weeden et al.

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