Gas separation – With separating media bypass or system gas pressure relief – Valved bypass means
Patent
1986-06-06
1987-12-22
Nozick, Bernard
Gas separation
With separating media bypass or system gas pressure relief
Valved bypass means
55387, 55502, 55521, 55DIG35, 12820528, 12820529, 12820617, 291635F, 1563077, B01D 5000
Patent
active
047144866
ABSTRACT:
A filter canister for use with gas masks has telescoping top and bottom parts that are, in the assembled canister, sealed together. A filter for particulate material is molded in situ in the top part, while a separate adsorbent material cartridge is fitted into the bottom part. In manufacturing the canister, the cartridge is manufactured separately, apart from the remainder of the canister so that it can be kept in a controlled environment so as to avoid possible contaminating due to a humid atmosphere. The molding of the filter for particulate materials normally a pleated paper filter, in situ and away from the cartridge avoids the requirement for a long adhesive drying time during which the adsorbent material in the cartridge is exposed to humidity. The new canister also exhibits greater strength than the known canisters.
REFERENCES:
patent: 2577606 (1951-12-01), Conley
patent: 2825424 (1958-03-01), Gross
patent: 3944403 (1976-03-01), Simpson et al.
Her Majesty the Queen in right of Canada
Nozick Bernard
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