Pleated poly(tetra-fluoro ethylene) filter cartridge

Details Pleated poly(tetra-fluoro ethylene) filter cartridge Pleated poly(tetra-fluoro ethylene) filter cartridge

1994-05-10

1999-01-05

Walker, W. L.

Liquid purification or separation

Filter

Supported, shaped or superimposed formed mediums

2104935, 21050027, 21050042, 55497, 55498, 55500, 55521, B01D 2706, B01D 3918

Patent

active

058557830

ABSTRACT:
A pleated, all poly(tetra-fluoro ethylene) filter element (20) incorporating a poly(tetra-fluoro ethylene) filter membrane (24) is shown and described. The membrane is supported by an all poly(tetra-fluoro ethylene) paper (26) and (28), which permits filtrate to pass through the paper and across the poly(tetrafluoro ethylene) membrane. A sandwich is formed by placing a layer of poly(tetra-fluoro ethylene) filter membrane (24) between the two layers of poly(tetra-fluoro ethylene) support paper, (26) and (28), and the sandwich is then pleated prior to assembly around a core (14) and between end caps (12) and (18), which are bonded to the poly(tetra-fluoro ethylene) paper and poly(tetrafluoro ethylene) filter membrane by a hot-melt process.

REFERENCES:
patent: 5154827 (1992-10-01), Ashelin et al.
patent: 5158680 (1992-10-01), Kawai et al.

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