Method of ventilating underground mines and improved brattice cl

Stock material or miscellaneous articles – Composite – Of bituminous or tarry residue

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428235, E21F 114

Patent

active

043984517

ABSTRACT:
An improved brattice cloth construction and method of utilizing the same in the ventilation of underground mines comprising a coherent, strong felt formed from a thick batting or mat of textile staple fibers needle-punched into dense, tightly intertwined and interlocking engagement, a flame retarding chemical impregnant in sufficient amount to impart to felt an acceptable flame resistance, and preferably an openwork substrate disposed within the staple fiber felt with staple fibers needle-punched therethrough and interconnected therewith.

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patent: 2943010 (1960-06-01), Stefl et al.
patent: 3179551 (1965-04-01), Dudas
patent: 3284872 (1966-11-01), Closson, Jr.
patent: 3307990 (1967-03-01), Homier et al.
patent: 3451885 (1969-06-01), Klein
patent: 4009649 (1977-03-01), Thimons
patent: 4055074 (1977-10-01), Thimons

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