Coffee brewer filtration device

Details Coffee brewer filtration device Coffee brewer filtration device

1990-10-30

1993-03-02

Dawson, Robert A.

Liquid purification or separation

Filter

Resting on supporting receiver, e.g., portable

210282, 2104942, 210498, 210499, 426 77, B01D 29085

Patent

active

051906538

ABSTRACT:
A reusable filtration element for a coffee brewer has a microscopic arrangement of holes which permit coffee beverage to pass through while turbidity and sediment causing solids are effectively removed. The holes are preferably from 12 to 60 microns across and provide from 5 to 30 % open area in the filter element. In one preferred embodiment, the holes are circular, arranged in rows such that intersecting rows form an angle of 60.degree., and preferably taper from top to bottom. A preferred filtration element is preferably formed by photoetching stainless steel foil. The filtration element is preferably positioned over a foraminous support.

REFERENCES:
patent: 3935112 (1976-01-01), Greutert
patent: 4080299 (1978-03-01), Bartolome
patent: 4123228 (1978-10-01), Frei et al.
patent: 4231876 (1980-11-01), Zimmermann et al.
patent: 4801379 (1989-01-01), Ehrsan et al.
patent: 4867880 (1989-09-01), Pelle et al.

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