Air filters

Details Air filters Air filters

1979-05-31

1981-05-19

Nozick, Bernard

Gas separation

Zigzag, corrugated, or conical

2104931, B01D 4610

Patent

active

042682908

ABSTRACT:
A pleated paper filter element has the configuration of the frustrum of a cone with the pleats extending lengthwise of the sloping wall of the cone and has pleat separation dimples embossed into the paper from which the element is made, the height of said dimples being graduated lengthwise of the element so as to provide controlled pleat separation over at least most of the length of the element.

REFERENCES:
patent: 2936855 (1960-05-01), Allen et al.
patent: 2968361 (1961-01-01), Buckman
patent: 3531920 (1970-10-01), Hart

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