this invention resides in a beverage making apparatus containing a new and novel purification unit for purifying potable water . the potable water purification unit shown in fig1 . shows a perspective drawing of rectangular shaped purification unit 1 viewed along line 4 -- 4 , containing side walls 2 . generally , there are four side walls 2 , which connect with each other , forming a barrier for potable water . preferably , side walls 2 slope inwardly to facilitate the passage of water through the unit . connected to side walls 2 is bottom wall 6 which forms a support for purification agent 10 . near the top of side walls 2 is peripheral lip 8 which extends around the perimeter of side walls 2 . peripheral lip 8 mates with the top boundary of the water reservoir of a beverage making machine . it should be noted that potable water purification unit 2 can have a square configuration instead of the rectangular configuration depicted in fig1 . fig2 . shows a potable water purification unit 12 which has a circular configuration . in fig2 ., bottom wall 16 forms a support for purification agent 10 and connects to circular side wall 11 . peripheral lip 14 is located near the top of circular wall 11 and extends around the perimeter of said circular wall . fig3 . is an alternate embodiment of the water purification unit depicted in fig2 . wherein peripheral lip 18 is located near the bottom of circular wall 11 and extends around the perimeter of said circular wall . it is to be understood that the peripheral lip of the potable water purification units herein can be located near either the top or bottom of the side walls of the water purification units , in accordance with the beverage apparatus manufacturer &# 39 ; s specifications . fig4 . is a cross - section view of fig1 . in particular , potable water purification unit 1 is a cut - away view showing side wall 2 , bottom wall 6 and peripheral lip 8 located near the top of side wall 2 . bottom wall 6 has one or more openings 22 which allow purified potable water to drain therethrough . preferably , bottom wall 6 has multiple openings 22 . potable water purification agent 10 is preferably those water purification agents which effectively remove undesirable agents from potable water . representative purification agents which are suitable for use herein include activated carbon , activated silica , greensand , synthetic zeolites , polystyrene resins , alum , ferric sulfate , potassium permanganate , diatomaceous earth , bentonite clays , sodium aluminate , calcium carbonate , sodium silicate , sodium carbonate and sodium chloride and mixtures thereof . activated carbon is the preferred purifying agent 10 herein . sources for activated carbon include wood , bituminous coal , coconut shells , lignite , peat , bones , pecan shells , petroleum base residues and pulp mill black ash to name a few . the activation process consists of the source materials being carbonized under controlled conditions , the resulting carbon ( charcoal ) being treated with an oxidizing gas such as steam or air at elevated temperatures . greensand is produced from naturally occurring compositions by open pit mining said material , followed by washing , screening and treatment with caustic to remove clay . further treatment with alum , silicates and other salts produces a durable greenish - black mineral which is relatively inert except for its ion - exchange properties . synthetic zeolites are formed by mixing and reacting together solutions of sodium silicate and sodium aluminate under such conditions that precipitates do not form . the reaction mass is allowed to set into a homogenous gel , dried , crushed and activated by calcination . various metals may be added to the zeolite to enhance its water purification properties . polystyrene resins are produced by the polymerization of styrene and divinyl benzene . normally the resins form spheres of from about 0 . 45 to about 0 . 5 mm in size . preferably , the water purification agents 10 , herein , are either in solid powdered form or solid granulated form . generally , said water purification agents have a mesh size of from about 28 to about 70 . for reasons of convenience and to insure the integrity of the purification agents , it may be desirable to inclose said agent in a mesh screen or water permeable membrane . the mesh size of the screen will , of course , be smaller than the mesh size of the water purification agent . water permeable membranes by definition have very small pore openings . the use of a mesh screen or water permeable membrane will ensure the rapid addition of the water purification agent to or removal from the water purification unit . in fig5 ., potable water purification unit 1 from fig1 . ( rectangular configuration ) is supported at the top of water reservoir 25 of beverage making apparatus 24 by peripheral lip 8 . potable water is poured into water purification unit 1 , where under the influence of gravity and constrained by side walls 2 , the potable water contacts water purification agent 10 . water purification agent 10 is supported by bottom wall 6 which has multiple openings 22 . the purified water passes through the bottom wall via openings 22 into reservoir 25 of beverage making apparatus 24 . the purified water is heated using conventional beverage making apparatus heating means and transported utilizing conventional transport means to beverage apparatus opening 27 , where said heated and purified water is discharged into beverage receptacle 26 . the heated and purified water contacts beverage flavoring agent 28 and passes through bottom wall 31 via openings 32 into beverage reservoir 34 . it should be noted that beverage receptacle 26 is supported near the top portion of beverage reservoir 34 by lip 30 . suitable beverage flavoring agents include coffee or tea . it is to be understood , however , that other beverage flavoring agents which are conventional in the beverage making industry may be substituted for the above - defined coffee or tea . the flavored beverage is maintained at the desired temperature by heating pad 36 . fig6 . is an alternate embodiment of fig5 . wherein purification unit 12 ( circular configuration ) is utilized . in fig6 potable water is poured into water reservoir 25 of beverage making apparatus 24 , where it is heated using conventional heating means and transported , using conventional transportation means , to water discharge opening 27 . heated , potable water is , next , discharged into water purification unit 12 ( circular configuration ) where it contacts purification agent 10 . water purification unit 12 is supported on the top portion of beverage receptacle 26 by peripheral lip 14 . after contacting purification agent 10 , purified water drains through bottom wall 6 via multiple openings 22 and is discharged into beverage receptacle 26 . the purified water contacts beverage flavoring agent 28 and is discharged through openings 32 of bottom wall 31 into beverage reservoir 34 . the flavored beverage is maintained at the desired temperature by heating pad 36 . fig7 . is yet another embodiment of the potable water purification unit herein . particularly , fig7 . is a cut - away view of beverage making apparatus 24 in fig5 and 6 , wherein the water purification unit 38 is located below the water reservoir . potable water from the water reservoir enters water purification unit 38 via conduit 36 under the influence of gravity . potable water contacts water purification agent 10 where it is purified . water purification unit 38 can be either rectangular , square or circular in configuration , depending upon the specification of the manufacturer of the beverage making apparatus . water purification unit 38 is equipped with a bottom connecting member 41 which has screw - off and screw - on means . bottom connecting unit 38 , additionally , is equipped with sealing means , for example , an o - ring or a gasket . conventional gaskets in the beverage making technology are suitable for use herein . an example of suitable screw - on means , is mating screw threads on the bottom of purification unit 38 and on bottom connecting member 41 . the screw - on means of bottom connecting member 41 , engage , screw onto and mate with the screw threads on the bottom of purification unit 38 , forming a liquid - tight seal therewith . next , purified water is transported via conduit 42 through heat expansion conduit means 46 and conduit 48 to electric heating means 52 , where said water is heated to the desired temperature . heat expansion conduit means 46 is equipped with fastener 47 to provide a leakproof seal . conventional materials such as rubber , plastic , etc ., and fasteners are suitable for use in the construction of heat expansion conduit means 46 . heated water from electric heating means 52 is transported via conduit 50 to beverage receptacle 26 , for example , as in fig5 and 6 . from this point on , the beverage is produced in accordance with the descriptions in fig5 and 6 . obviously , many modifications and variations of the invention , as hereinbefore set forth , may be made without departing from the spirit and scope thereof , and therefore , only such limitations should be imposed as are indicated in the appended claims .
the present invention resides in a beverage making machine containing a purification unit for purifying potable water . the purifying unit contains a purifying agent and is detachably mounted on either the water reservoir or on the basket where water contacts the brewing agent or beverage making agent of the beverage machine . in an alternate mode , the water purifying unit is located below the water reservoir of a beverage making machine . the bottom member of the water purifying unit is detachably mounted on the bottom of said units with screw - on means .