Progressive felting of filter elements

Details Progressive felting of filter elements Progressive felting of filter elements

1975-05-19

1976-11-30

Lutter, Frank W.

Coating processes

Vacuum utilized prior to or during coating

Metal base

210496, 210505, 264165, B29J 102

Patent

active

039950760

ABSTRACT:
A method for progressively vacuum forming a fibre batt about a porous member whereby, accretion, consolidation and dewatering of the batt occurs under constant vacuum conditions and includes continuously introducing a vacuum through a fixed porous arbor disposed in a tank containing a slurry of fibrous material in water, to thereby define a fixed vacuum zone between sealed first and second portions of the arbor, for the progressive formation of a fibrous batt in the vacuum zone, and continuously advancing the arbor through the vacuum zone at a preselected constant rate of travel.

REFERENCES:
patent: 2539767 (1951-01-01), Anderson
patent: 2539768 (1951-01-01), Anderson
patent: 2700326 (1955-01-01), Curtis
patent: 3619353 (1971-11-01), Williams
patent: 3793138 (1974-02-01), Rohrer

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