Respirator filter and method of making the same

Gas separation – Specific media material – With coating – impregnant – or bonding agent

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Details

55DIG5, 55DIG35, 428280, 428156, 12820617, 156254, B01D 3914

Patent

active

041792742

ABSTRACT:
A respirator filter is formed of felt impregnated with rosin, which is fractured throughout and is characterized by loosened fibers at one surface thereof. The method of forming the filter entails splitting a batt with fractured rosin impregnation to separate and displace the fibers at the plane of cleavage from their prior felted position.

REFERENCES:
patent: 2368024 (1945-01-01), Himmell
patent: 2521984 (1950-09-01), Lang
patent: 2772195 (1956-11-01), Gaarder
patent: 2782933 (1957-02-01), Monsarrat
patent: 3142549 (1964-07-01), Klusewitz et al.
patent: 3624161 (1971-11-01), Bub
patent: 3850600 (1974-11-01), Monsted, Jr.

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