Method of making a graduated density liquid filter element

Details Method of making a graduated density liquid filter element Method of making a graduated density liquid filter element

1978-04-14

1980-02-05

Spitzer, Robert H.

Adhesive bonding and miscellaneous chemical manufacture

Methods

Surface bonding and/or assembly therefor

291635F, 242 702, 210315, 210489, 210492, 210494R, B31C 1300, B65H 8108

Patent

active

041871367

ABSTRACT:
A graduated density liquid filter element for use in an internal combustion engine. Two layers of fibrous media of dissimilar size and having different permeability are disposed in partially overlapping relation and wound in coiled form to provide a generally cylindrical filter element in which resistance to the flow of the liquid varies along the length of the element.

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patent: 3384241 (1968-05-01), Nostrand
patent: 3415384 (1968-12-01), Kasten
patent: 3443366 (1969-05-01), Schwab

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