in fig1 and 2 , there is shown a rinsing container 1 , which has an approximately cylindrical shape , particularly a cylindrical shape somewhat flattened on one longitudinal side , there being disposed on the inner surface of the cylinder in the vicinity of its upper rim , a nozzle 2 through which the rinsing water passes substantially tangentially into the container 1 . the vegetables or the like , which are to be cleansed , are passed through an aperture near the top of the container thereinto . fresh water is supplied into the container in a known manner , also in the vicinity of the upper rim of the container 1 . a coarse sieve is provided on a lower wall of the container 1 , which has mesh dimensions of approximately 6 millimeters , and therefore retains , in addition to the goods to be cleansed , also impurities of substantially large dimensions , if the rinsing water is passed from the container 1 into a discharge drain 4 , which extends parallel with the axial length of the container 1 , and is inclined at one end thereof , which end communicates with an outlet 10 . within the discharge drain 4 , and extending approximately parallel thereto , there is also disposed a sieve 5 of fine dimensions , which has , similar to the discharge drain 4 , a funnel - like shape ( fig1 ), or , alternately , a semi - circular cross - section 5 &# 39 ; ( fig5 ); the fine sieve 5 , 5 &# 39 ; has sieve dimensions considerably smaller than that of the coarse sieve , but an operative area larger than that of the coarse sieve . a longitudinal wall of the discharge drain 4 is formed with a discharge opening 6 , which communicates with a tube 7 , which in turn communicates with an inlet of a recirculating pump 8 , the latter having an outlet 9 communicating with the container 1 through the nozzle 2 . the rinsing water and goods to be cleansed are then moved in the sense of the arc - shaped arrows shown in fig1 . small - sized impurities passing through the coarse sieve 3 are retained by the sieve 5 having fine dimensions , and are then discharged by the rinsing water through an inner tube of the outlet 10 . any larger - sized impurities retained by the coarse sieve 3 may be removed by a detachment of the coarse sieve from the container 1 , while fresh water is supplied to the fine sieve 5 through a nozzle 11 -- which supply is preferably pre - programmed -- but only when the outlet valve 10 is opened , so that impurities are removed through the inner tube associated with a fine sieve 5 ; any small - sized impurities clinging to fine sieve 5 are removed following cleansing of the food , by cleansing of the fine sieve 5 . any impurities remaining on either the coarse sieve 3 , or the fine sieve 5 , are passed to the outlet valve 10 via a vent 12 . the arrangement of flat nozzles shown in the upper portion of the container 1 , according to fig3 includes three nozzles 13 , 14 , and 15 , each nozzle being operative for forming a flat jet , which nozzles are connected via tubes 16 , 17 , and 18 , respectively , with the outlet tube 9 of the recirculating pump 8 ( see also fig1 ). the effect of the nozzles 13 , 14 , and 15 , which produces a more uniform distribution of the recirculating fluid , can be improved even further by associating three guide walls 19 , 20 , and 21 , with each of the nozzles , so that there are created , for example , a total of 12 outlet channels . finally , the container 1 can be sub - divided by a plurality of partitions 22 and 23 , which completely fill its cross - section , into a plurality of individual container portions , which makes it possible to rinse several types of vegetables or salads simultaneously . the programming sieve shown in fig4 which is known per se , shows the dependence of time in seconds in the upper graph . in the second graph of the recirculating pump , both the timer and the recirculating pump are connected during the entire programming time . in the three lower graphs , there are shown operating times for the discharge of the rinsing water , for the replenishment of fresh water , and finally for the apportioning of , for example , inorganic minerals . the time up to 600 seconds applies to the so - called coarse program , and the remaining time of up to 900 seconds for the so - called fine program , which is provided for goods containing relatively few impurities , for example , fine salads grown in a greenhouse , or the like . we wish it to be understood that we do not desire to be limited to the exact details of construction shown and described , for obvious modifications will occur to a person skilled in the art .
a food cleansing machine includes a container for receiving food , a pump for injecting rinsing fluid into the container tangentially , coarse and fine sieves for sifting the food from any impurities , and a discharge device for flushing out the impurities together with the rinsing fluid . the operative surface area of the fine sieve exceeds the operative surface area of the coarse sieve .