HEPA air filter for high temperature environments and method of

Details HEPA air filter for high temperature environments and method of HEPA air filter for high temperature environments and method of

1988-10-03

1989-12-05

Dawson, Robert A.

Gas separation

With means securing or retaining separating media

Unit or cohesive sheet-like media in flow line or frame

55500, 55502, 55521, 55DIG31, 156227, 156257, 156292, 156298, 428120, 428182, 428184, B01D 2706, B01D 2708

Patent

active

048850152

ABSTRACT:
An air filter unit of the HEPA type having a filter core of zig-zag folded media enclosed by a four-sided frame having two side casings and two end casings. Each end casing includes a recess extending into the inwardly facing surface thereof and bounded on all four sides by marginal edge portions of the end casing. The end flaps of the folded media are adhesively secured to the inwardly facing surfaces of the side casings and the recesses in the end casings are filled with an adhesive initially in a flowable state and hardenable to a solid state. The zig-zag edges of the folded media are disposed entirely within the adhesive, as are tenons extending from the ends of the side casings, thereby forming a mortise type joint between the side and end casings. A plurality of channels, preferably of dove tail cross section, extend across and communicate with the recesses in the end casings.

REFERENCES:
patent: 2884091 (1959-04-01), Baldwin
patent: 3581479 (1971-06-01), Goulet et al.
patent: 4199387 (1980-04-01), Hladik
patent: 4227953 (1980-10-01), Wasielewski et al.
patent: 4537812 (1985-08-01), Elbers
patent: 4600419 (1986-07-01), Mattison
patent: 4795481 (1989-07-01), Ellis

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