Method for making a filter

Details Method for making a filter Method for making a filter

1978-09-29

1980-03-25

Hoag, W. E.

Plastic and nonmetallic article shaping or treating: processes

With printing or coating of workpiece

Coating or impregnating workpiece before molding or shaping...

264 466, 264138, 264255, 264261, 264263, B29C 1708, B29C 2500

Patent

active

041950500

ABSTRACT:
Method for making a filter which comprises a plurality of closely juxtaposed tubes made of a filter material and packed tightly in a tubular envelope. Both ends of the tubes are initially closed. The envelope with the tubes is then dipped to a small depth into a hardenable substance, e.g. latex, which fills the gaps between the tubes and on hardening forms a solid bottom on the envelope. A small length of the envelope and tubes is then severed to open one end of the tubes.

REFERENCES:
patent: 1815721 (1931-07-01), McGraw
patent: 3255280 (1966-06-01), Burrowes
patent: 3442002 (1969-05-01), Geary et al.
patent: 3525786 (1970-08-01), Meyn
patent: 3579810 (1971-05-01), Mon
patent: 4105731 (1978-08-01), Yamazaki

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