Process for making hermetically sealed filter units and filters

Details Process for making hermetically sealed filter units and filters Process for making hermetically sealed filter units and filters

1994-04-26

1996-09-17

Lithgow, Thomas M.

Liquid purification or separation

With repair or assembling means

210445, 210446, 264263, 2643281, 264DIG48, B01D 2708, B01D 3530

Patent

active

055565417

ABSTRACT:
A process for the manufacture of hermetically sealed filter units and a product made thereby. The process comprises aligning a porous filter element between two housing parts and a thermoplastic skirt that overlaps the edge of at least one housing part to shield the edge of the filter element disposed adjacent to the skirt, pressing the housing parts together and then injection molding a thermoplastic overmold band around the outer portions of the housing parts to form a hermetic seal at the edge of the filter element.

REFERENCES:
patent: 4229306 (1980-10-01), Hein
patent: 4444661 (1984-04-01), Jackson
patent: 4450078 (1984-05-01), Walker
patent: 4826598 (1989-05-01), Cain
patent: 4828694 (1989-05-01), Leason
patent: 4874513 (1989-10-01), Chakraborty
patent: 5049274 (1991-09-01), Leason
patent: 5108709 (1992-04-01), Bugar
patent: 5308483 (1994-05-01), Sklar

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