초록 ▼

A filter assembly, particularly for use with a plastic bottle having an open neck with an inside diameter of about 50 mm or less (e.g. about 25 mm), includes a tube of filtering material connected to one surface of a cap while a valve extends from an opposite surface of the cap. The tube is preferab

A filter assembly, particularly for use with a plastic bottle having an open neck with an inside diameter of about 50 mm or less (e.g. about 25 mm), includes a tube of filtering material connected to one surface of a cap while a valve extends from an opposite surface of the cap. The tube is preferably of filtering material such as activated carbon with plastic binder, having a substantially continuous liquid-porous sidewall, a hollow interior, a first closed end, and a second open end. The tube is operatively connected to the cap second surface at the tube second open end by sonic welding, a mechanical connection, or adhesively. The cap has a fitting portion for cooperating with the bottle neck, such as internal screw threads or a snap portion. The valve may be a reciprocating valve, a baby bottle nipple, or a spray device. A biocidal medium may be disposed within the hollow interior of the filter tube, and the tube may be wrapped with a filter material having a pore size of about 1-4 microns. The filtering material is capable of reducing the level of chlorine and water passing through it by at least 50% at a flow rate of about 5 ml/second.

대표청구항 ▼

A filter assembly for use with a bottle having a circular cross-section neck or open end to simultaneously cap the neck or open end and filter liquid poured out of the bottle through the neck or open end, comprising: a tube of filtering material, having a substantially continuous liquid-porous side

A filter assembly for use with a bottle having a circular cross-section neck or open end to simultaneously cap the neck or open end and filter liquid poured out of the bottle through the neck or open end, comprising: a tube of filtering material, having a substantially continuous liquid-porous side wall a hollow interior, a first closed end, and a second open end; a cap for a bottle neck or end, having a fitting portion thereof for cooperating with a bottle neck or end and closing a neck or end, said cap having first and second substantially opposite surfaces; a manual valve operatively associated with said cap, in fluid communication with said tube of filtering material and manually movable between a position defining means for allowing liquid flow through said tube and a position defining means not allowing liquid flow through said tube; and said tube operatively connected to said cap second surface at said tube second open end, and wherein said filtering material comprises a substantially continuous self-supporting, self-venting body of activated carbon and binder having a porosity of about 10-120 microns.