Fluted filter medium and process for its manufacture
AssigneeDondaldson Company, Inc.
InventorsPatrick Golden, Gregory L. Reichter, Daniel T. Risch
Life of this patent
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Abstract
An approach to providing folded flute ends in z-filter media is provided. The approach generally involves providing an initial deformation in a flute or corrugation to form at least one foldable tip and then folding the at least one foldable tip over. Techniques for both supported deformation and unsupported deformation are provided. Preferred corrugated media having fold arrangements, filter constructions having such fold arrangements, and filter system using such filter constructions are provided.
Claims19
A process of manufacturing a filter media construction including a sheet of fluted media secured to a facing sheet of filter media;
- said process including steps of:
- (a) securing the sheet of fluted media to the sheet of facing media with a sealant to form a web of media;
- and
- (b) directing the web of media between a wheel and a roller arrangement to deform a portion of the flutes and form deformed flute closures at each respective deformed flute.
A filter media construction comprising:
- (a) a fluted sheet of filter media;
- (b) a flat sheet of filter media secured to the fluted sheet of filter media to form a web of media;
- (c) the web of media being positioned in a filter to define a set of inlet flutes and a set of outlet flutes extending between an inlet face and an outlet face;
- (i) each inlet flute being closed to passage of unfiltered fluid therethrough, adjacent said outlet face;
- (ii) each outlet flute being closed, to passage of unfiltered fluid therein, adjacent said inlet face;
- and
- (A) at least the set of inlet flutes or the set of outlet flutes is closed by deformed flute closures;
- the deformed flute closures comprising closures resulting from the web of media being directed between a wheel and a roller arrangement.
Dependencies are inferred from the claim text.