Abstract A novel filtration system for purifying a relatively small volume of water, and especially for removing objectionable tastes and odors from drinking water. An inverted container of the water to be purified is supported above a filter which in turn is supported above a bottom container for receiving the effluent from the filter. The upper container is provided with an outlet tube which extends into the filter and is provided with means for regulating the flow of water to the filter. The filter holds a disposable filter medium in the form of a thin "sandwich" of two outer sheets of readily permeable material and a thin inner layer of activated carbon particles disposed uniformly between the two outer sheets. In operation, water flows from the upper container through the filter into the bottom container, the rate of flow of water from the upper container being controlled automatically by the level of water in the filter. A simple and inexpensive process for purifying a relatively small volume of water, and which is especially suitable for a one-time use of the disposable filter medium component, is thus provided.
A process for removing objectionable tastes and odors from a relatively small volume of water at an automatically controlled rate of flow which comprises allowing the water to flow by gravity from an inverted upper container closed except for an outlet opening and superimposed above and discharging into and below the top of a filter which in turn is superimposed above a filtrate-receiving container, said filter holding a disposable activated carboncontaining filter medium, the rate of flow of the water from the upper container to the filter being controlled automatically by the level of water in the filter with air entering said container exclusively through said outlet opening to replace water emptying through said outlet opening.
Claim 2
Dependent Claim
116 words
A process for removing objectionable tastes and odors from a relatively small volume of water at an automatically controlled rate of flow which comprises allowing the water to flow by gravity from an inverted upper container closed except for an outlet opening and superimposed above and discharging into and below the top of a filter which in turn is superimposed above a filtrate-receiving container, said filter holding a disposable activated carboncontaining filter medium, the rate of flow of the water from the upper container to the filter being controlled automatically by the level of water in the filter with air entering said container exclusively through said outlet opening to replace water emptying through said outlet opening.
Claim 3
Dependent Claim
100 words
Apparatus for removing by filtration objectionable tastes and odors from a relatively small volume of water, comprising an upright first container for receiving the filtered water, a filter funnel supported on or above said upright container and discharging thereinto, a disposable filter element containing activated carbon inserted in said funnel, an inverted second container for water to be filtered mounted above said filter funnel with the discharge outlet from said inverted container disposed in and below the top of said funnel and said filter element therein, said second container being closed to entrance of air except through said discharge outlet.
Claim 4
Dependent Claim
100 words
Apparatus for removing by filtration objectionable tastes and odors from a relatively small volume of water, comprising an upright first container for receiving the filtered water, a filter funnel supported on or above said upright container and discharging thereinto, a disposable filter element containing activated carbon inserted in said funnel, an inverted second container for water to be filtered mounted above said filter funnel with the discharge outlet from said inverted container disposed in and below the top of said funnel and said filter element therein, said second container being closed to entrance of air except through said discharge outlet.
Claim 5
Dependent Claim
29 words
The apparatus of claim 2 wherein said filter element is formed from a sheet having two outer webs of water-permeable material with a layer of activated carbon particles therebetween.