Method of making a beverage ingredient filter

Details Method of making a beverage ingredient filter Method of making a beverage ingredient filter

2011-08-23

2011-08-23

Nguyen, Jimmy T (Department: 3725)

Presses

Methods

C264SDIG048, C210S496000

Reexamination Certificate

active

08001886

ABSTRACT:
Beverage ingredient filter (10) having a inwardly located, filtering, section (12) of water permeable filter paper (11) and an outwardly located, water impervious, nonfiltering outer section (14) joined to the surrounding the inner filtering section (12). The beverage ingredient filter (10) is made by forming, from water permeable paper filter stock having a porous structure, the inner section (12) defining the bottom surrounded by the outer section (14) defining an encircling cylindrical wall, and altering the outer section (14) to render the outer portion (14) water impermeable. Altering may be performed by dimensionally reducing the porous structure of the outer section relative to the inner section until it is substantially water impervious relative to the inner section (12), securing together the porous structure after the porous structure has been dimensionally reduced, and holding the outer section in a dimensionally reduced, nonporous state relative to the inner section.

REFERENCES:
patent: 3138695 (1964-06-01), Bracich
patent: 5298267 (1994-03-01), Gruenbacher
patent: 5417906 (1995-05-01), Chiodo
patent: 5633026 (1997-05-01), Gruenbacher
patent: 6662955 (2003-12-01), Lassota

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