Filter for use in a cartridge for the preparation of a beverage

Details Filter for use in a cartridge for the preparation of a beverage Filter for use in a cartridge for the preparation of a beverage

1988-09-16

1991-04-16

Jones, W. Gary

Liquid purification or separation

Filter

Resting on supporting receiver, e.g., portable

210498, 99295, A47J 3100, B01D 3910

Patent

active

050080130

ABSTRACT:
A filter employed for the extraction of beverages is formed of a piece of material having two planar surfaces and a plurality of uniformly distributed openings extending through the piece. A plurality of nipples, equal in number to the number of openings, project from and out of at least one of the planar surfaces and extend for a distance substantially equal to the thickness between the planar surfaces of the piece of material, each nipple being associated with one of the openings through the piece of material, and each opening extends through each nipple. The openings have a shape of a truncated cone, a truncated pyramid, or a truncated tetrahedron, and each opening at the end of each nipple, which is disposed away from the planar surface from which the nipple projects, forms a minor base of the opening shape and each opening at the other planar surface forms a major base of the opening shape.

REFERENCES:
patent: 1306415 (1919-06-01), Dunlap
patent: 1905350 (1932-07-01), Page
patent: 2936695 (1960-05-01), Donot
patent: 3292527 (1966-12-01), Stasse
patent: 4136202 (1979-07-01), Favre
patent: 4740303 (1988-04-01), Greutert et al.
Translation of Swiss Patent No. CH 605,293.

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