Title: Movable, continuously changing, self-charging electrostatic filter

Abstract: A non-woven, relatively thin filter media is formed of fine denier fibers wherein the media exhibits the characteristics of developing an electrostatic charge in the presence of a substantially dry air stream moving at a speed of at least 200 feet per minute. The fibers are selected from the group containing polyester, nylon, and polypropylene. A length of filter material so formed is moved or passed through an air stream or path containing weld smoke. The moving air causes the unique filter media to become electrostatically charged so that the fine particulate matter from the gaseous stream are removed more effectively than before.

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Inventors: Stockford, William F. (Salisbury, NC, US)
Gamewell, Joseph M. (Salisbury, NC, US)

Application Number: 028524
Filing Date: 1979-04-09
Publication_date: 1980-10-21
Assignee: Gamewell Manufacturing, Inc. (Salisbury, NC)
Primary Class(es): 95/77 55/354, 55/524, 55/528, 96/17, 96/94, 96/99
Other Classes:
US Patent Ref:

2579440	Dec, 1951	Palmer	55/114.
2612966	Oct, 1952	Nicol	55/103.
2812038	Nov, 1957	Krueger	55/103.
3375638	Apr, 1968	Dungler	55/116.
3417552	Dec, 1968	Dyer et al.	55/528.
3537238	Nov, 1970	Dungler	55/131.
3783588	Jan, 1974	Hudis	55/131.
4011067	Mar, 1977	Care, Jr.	55/354.
4153433	May, 1979	Kihlstrom	55/528.

Other Refs: 2002871

Feb, 1979	GB

Other References: Van Orman, W. T. et al., Self-Charging Electrostatic Air Filters, in Heating, Piping & Air Conditioning, p. 157-163, Jan. 1952.