Method and structure for sealing tubular filter elments

Details Method and structure for sealing tubular filter elments Method and structure for sealing tubular filter elments

1980-02-14

1985-04-23

Spear, Frank

Liquid purification or separation

Filter

Supported, shaped or superimposed formed mediums

264DIG48, B01D 2706

Patent

active

045128928

ABSTRACT:
An improved method and structure for sealing the ends of a tubular filter element is described. The method comprises providing a strip on non-porous film along the edge of a sheet of microporous filter material, the strip being joined to the filter material fluid-tight at its outer portion but forming a free flap on its inner portion, forming the element with the strip at one end and over the upstream side of the filter material, embedding the end in liquid sealer to a depth terminating over the flap portion of the strip, and solidifying the sealer. A similar procedure is described for seaming the axially-extending side edges of a cylindrical element.

REFERENCES:
patent: 2732031 (1956-01-01), Rabbitt et al.
patent: 2941620 (1960-06-01), Thornburgh
patent: 3013667 (1961-12-01), Jackson et al.
patent: 3415384 (1968-12-01), Kasten
patent: 3457339 (1969-07-01), Pall et al.
patent: 3850813 (1974-11-01), Pall et al.
patent: 4392958 (1983-07-01), Ganzi et al.

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