초록

A fine mesh screen is coated with at least one metal, by galvanic or chemical deposition. Metals of the platinum group are especially advantageous. The mesh width may be as small as 0.1 micron or less. Several screens may be arranged in a stack and used to clean waste gases.

대표청구항 ▼

A method of cleaning a waste gas by catalytic action which includes passing the gas through a fine metal screen on which at least two different metal catalysts have been deposited by at least one of galvanic and chemical metal deposit, and wherein said at least two different metal catalysts are disp

A method of cleaning a waste gas by catalytic action which includes passing the gas through a fine metal screen on which at least two different metal catalysts have been deposited by at least one of galvanic and chemical metal deposit, and wherein said at least two different metal catalysts are disposed, at least partially, one adjacent the other. A fine screen stack comprising a plurality of layers of metal fabric on which at least one coating is formed by galvanic deposit; said coated metal fabric having mesh openings of a mesh width of less than two microns; said metal fabric having an inner portion within said mesh openings and at least one outer portion on opposing outer surfaces thereof; said metal fabric having at least one metal coating being deposited on said at least one outer portion of at least one of said outer surfaces of said metal fabric; said at least one galvanically deposited metal coating forming membranes extending from said at least one outer portion of said metal fabric to restrict said mesh openings of said metal fabric by forming openings substantially smaller than said mesh openings of said metal fabric and being less than two microns in width; and said layers of coated metal fabric being positioned in adjacent relationship to form a stack.