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

1977-05-19

1978-09-12

Cuchlinski, Jr., William A.

Liquid purification or separation

Filter

Within flow line or flow line connected close casing

128214R, 264251, 264255, 264257, 264273, 264DIG48, B01D 2500

Patent

active

041136276

ABSTRACT:
A process for the manufacture of intravenous solution filter units includes injection molding a sealing member onto the periphery of the assembled filter components to hermetically seal the components into an integral assembly. The filter unit itself includes a housing and a filter element disposed internally thereof. The filter element is supported by a grid having a design and placement within the housing to assure, in conjunction with other structural features of the filter, the complete purging of gases from the filtrate. Also disclosed is a method for hermetically sealing the filter element to its thermoplastic support which provides an improved seal which will not leak. This method comprises the molding of the support, the alignment of the filter element on the support, the application of pressure to hold the element on the support and the overmolding of the periphery of the element to seal the edge of the element to the support.

REFERENCES:
patent: 3148233 (1964-09-01), Gits
patent: 3397518 (1968-08-01), Rogers
patent: 3782083 (1974-01-01), Rosenberg
patent: 3803810 (1974-04-01), Rosenberg
patent: 3897342 (1975-07-01), Schmid et al.
patent: 3954625 (1976-05-01), Michalski

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