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Nov. 22, 1938. 2,137,678v H. M. SUTTON ET AL APPARATUS ‘FOR SEPARATING A_MAss OF SEEDS OFNARIED CHARACTERISTICS Filed Jan., 26, 1934 5 Sheets-Sheet-Ij Nmw -UH.Al 1m . m. INVENTOR ATTORNEY Nov. 22, 1938. H. M.~SUTTON ET AL 2,137,678 . APPARATUS FOR SEPARATING A MASS OF SCEEDYS OF'VARIED CHARACTERISTICS ’ - Filed Jan. 26, 1934 s sheets-snéet 2 con/Na MATERIAL ' COLLECTOR r: 40;" -f_ 'I' E 91 _ , . 2' . - . “55 92 _ I SEED DAMPENER 69 ‘Z4 - ,Y' . ' A COATING MATERIAL > a; ' HOPPER. » J WATER - GATE U . 440 . ‘t. . \S‘UCT/ON FAN —-> WEED SEED “*BUCKHORN SEED ' ' ,HqfuyMSuttonl . ?a'win vG. Sieefe r Nov. 22, 1938. H. M. SUTTON ET A1. 2,137,678 . APPARATUS FOR SEPARATING A MASS OF SEEDS OF VARIED CHARACTERISTICS , 5 Sheets-Sheet 5 Filed Jan. 26, 1934 ‘ . ‘ "1, 4' § HezuzyMSuh‘on ' E?l?l'il a?feele; . INVENTOR ORNEY > Nov. 22, I938; ‘ H. M. SUTTON ET AL 2,137,678 APPARATUS FOR SEPARATING A MASS OF SEEDS OF VARIED CHARACTERISTICS - Filed Jan. 26, 1934 5 Sheets-Sheet 4' DIRECT/0N “1 OF THRUST . 01/ 5111101: ' .1761.”in ?uSieal’e ‘ Hear INVENTOR ATTORNEY Nov. 22, 1938. 2,137,678 H. M. SUTTON ET AL APPARATUS FOR SEPARATING A MASS O-F SEEDS OF VARIED CHARACTERISTICS 5 Sheets-Sheet 5 Filed Jan. 26, 1934 H72‘ 6 o 77 'flE-lEl, 9833 73 102 7% ~93 Ki. J00 7 1476113171 ?SieG/é < INVENTOR ATTO R EY ' Patented Nov. 22, 1938 " UNITED STATES‘ “ 2,137,678 PATENT \ orrlca ' 2,137,678 " APPARATUS FOR SEPARATING: A MASS OF SEEDS 0F VARIED CHARACTERISTICS J~ Henry M.‘ Sutton and Edwin G. Steele, “ _ Dallas ,Tex. Application January 26, 1934, Serial No. 708,386 / 2 Claims. v(Cl. 209-4) This invention relates to apparatus for sepa-w ' located near the feeding point of the material to rating a mass of seedsof varied characteristics said surface, and designed etc deliver a current and it has particular reference to the separation‘ of air in a direction opposed to the forward move- . of seeds that release a mucilaginous material ment of the mass upon said surface, said current 6 when moistened with a suitable liquid from of air however, to act only upon the remaining others of a non-mucilaginous bearing character, upper stratum of, materialwhich contains such or from those on which this mucilaginous coating floating elements as the noxious coated seed which are made relatively lighter, due to the applied does not appear for a considerable period of time after moistening. ' coating and other worthless elements of the mass, _ The objects of the present invention include, 10 ?rst: The provision of means for moistening a mass of seed, preferably with water, containing w both mucilaginous ones with others that are not; mixing both while in the moistened state with a suitable dry comminuted material such as wood sawdust, or any suitable dry pulp that will be capable of adhering to the mucilaginous coat ing on the seed; feeding the mixed mass in a current of air to a separating air cushioned sur 20 face capable of stratifying the mass initially at the point of feed, thereby permitting the heavier . particles to settle and come into contact with the‘ floor of said surface; then the next lighter seed to report in a stratum above this and so on 25 until the top stratum will contain nothing but a surplus of the coating of comminuted The invention is further e?ective in drying the good seed stock by passing of air therethrough during separation material. not only a stream but like 30 wise leaves the same in a clean, polished condi tion by virtue of the intimate contact therewith of the coated seed prior to separation; The invention further embodies means for im-"‘ medlately removing'the surplusrstratum, of coat 35 ing material at the point of feed to the separat ing surface as soon as strati?ed by a suitable suction device that conveys it back to the orig inal feeding element from which it is delivered to the moistened feed stock; simultaneously’ there 40 with the moisture absorbed from the moistened seed is automatically removed from it in the .current of air by which it is being conveyedso that when it is again presented to the moistened seed, it is in practically a dry condition. 45 , Another object of the invention includes a means for separating» the strati?ed elementsof the mass into zones of material of varied char-' acteristics, such as sand dirt clods, good seed and the noxious coated seed as well as other noxious so as to confine .themto a zone’ which will be 10 made to report from a separating surface at a point approximately opposite to the point of feed to said surface and separately collecting this product from the good seed, which is-made' pos sible by the increased area presented to the up 15 lifting air currents by coating, Still another object of the invention is to pro vide an apparatus to effect a highly practical separation of pest seed from seed having de-. sirable characteristics by the association there with of a material capable of adhering to the pest seed without the necessity of excessive wet ting, which would require special drying equip ment. Not only does the present invention avoid excessive wetting, but due to the absorbent qual ity pf ‘the coating material employed, combined with they drying effect of the air currents upon the seed and the coating material, a dual ad vantage is obtained, that of preventing discolora tion of and other ill effects upon the seed and prepares the coating material ‘for immediate re use without waiting for the same to become suf ?ciently dry to render the same suitable for con- ‘ tinued use or without extraneous means to ef fect such drying. ' / I 35 While the invention is intended for the sepa ration of such muciiaginous bearing- seed as buck horn, plantain, bracted plantain and others of a similar nature from those of the clover family or other good seed, it is also capable of separating 40 simultaneously therewith other noxious weed seed from good seed of any kind simply by their dif ference in specific gravity where such di?erence exists, without regard to any arti?cially applied ' ‘ coating, which thus enables‘ the operator‘to make 45 numerous separations simultaneously with the separated coated seed of other pest seed in a single unit from a seed stock which would other wise require numerous other machines or opera 50 or foul seed, and then these separate zones are tions to complete. 55 draft of air from pneumatic blowing skimmers, in the description‘ to follow. ’ . 50 ‘ ' With the foregoing objects as paramount, the separately collected from different points from , invention has particular reference to its salient this separating surface, as individual products. features of' construction shown in the annexed A further and important object of the inven tion is to include means for applying a slight drawings forming a part hereof and described - . _ 2 2,137,678 Figure 1 is a perspective view of the complete‘ assembly showing‘ a pneumatic separating table. with means for coating the seed and means for collecting and returning the excess coating ma terial for re-use. ' ' . Figure 2 is a diagram showing the flow of ma terial through the apparatus. , Shaft I 2, by means of sprocket chain [1, pass-v ing- over suitable sprocket wheels located on shafts I8 and I2, actuates the conveyor l9, oper ating in the trough 20. This conveyor advances ‘the coating material such as wood sawdust and the like to a point to be elevated to effect asso ciation thereotwith the seed to be separated. This detail will be explained presently. paratus, partly in section. \ An elevator housing 2| embraces a series of Figure 4 is an end elevation of the coating ap elevator buckets 22 mounted on chain 23. See paratus, partly in section and taken on lines 4-4 Figure 4.‘ The chain 23 is caused to move by on Figure 3. t . sprocket wheels mounted on shaft l8 and short Figure 5 is a side elevation, partly in section, shaft 24. Being thus moved, the elevator buckets showing the running gear of the pneumatic sepa 22 are caused to discharge their contents into the rating table. ' i conveyor trough 25 in which operates the con Figure 6 is a fragmentary perspective view of a veyor I3, the purpose of which will be set out pneumatic blowing bar or skimmer. later in this description. Figure 7 is a vertical section on lines 1--'| on - Conveyor ‘belt 26 is driven by shaft l0, which Figure 6. latter is the driven shaft and in turn drives Figure 8 is a perspective view of air gates con short shaft 21 through chain drive 28. See Fig trolling the air for the pneumatic blowing bar. .ure 3. This conveyor belt 26 surrounds pulleys Figure 9 is a perspective view fragmentarily 28 and 30 and is supported by idle rollers 3|. See showing the deck construction of the pneumatic Figure 1. The belt 26, being arranged to operate Figure 3 is a side elevation of the coating ap 10 15 20 _ separating table. 25 , Figure 10 is a plan view of the deck of the pneu matic separating table with the pneumatic blow ing bars omitted. » . Figure 11 is a view in vertical cross section of the hood employed to collect excess coating ma :30 tegial from the deck of the pneumatic separating a le. ‘ i Figure 12 is a similar view with portions broken on an incline, receives thev mixed seed, which have been moistened and associated with the 25 coating material, from the discharge of conveyor I3 and carries the mixture upwardly for discharge into the hopper 32 and onto the table deck sur face 33. In connection with the preparatory treatment 30 brie?y described in the foregoing, a pneumatic system is shown for returning the surplus coating away showing the end of the hood shown in vmaterial from the table deck surface 33 back 11. ' , ‘ _ to the original hopper 34 into which the ma 135 Figure 13 is a perspective view of the speed terial is fed from the container 35, suspended 35 change and driving mechanism of the pneumatic thereabove. Return of the coating material is' separating table. accomplished by means of the suction fan 36, Figure 14 is a detail view fragmentarily show which is driven from the motor shaft 3 by means ing the construction of the pneumatic separating of belt 31, passing over a pulley mounted on the table, illustrating means for adjusting the lateral motor shaft, thence over a similar pulley located 40 . inclination of the deck. on the fan shaft, not shown. A suction hood 38 Figure 15 is a fragmentary perspective view of is connected to the suction side of the fan 36 by the separator fan, showing ‘the air gate to con means of a pipe or conduit 39. The fan 36 con trol the air going to the separator deck, and _ veys the material lifted by suction into the hood Figure '16 is a perspective view of the ?exible 38, through pipe 39, thence through pipe 40 into 45 .boot and feed hopper to deliver feed to the sepa the container or, collector 35, previously men rating surface. toned but what may be any of the well known .AContinuing with a more detailed description‘ type of dust collectors. As stated, the reduced of the drawings, that part of the invention deal lower end of the dust collector 35 discharges into ing with the preliminary preparation of the seed - the material hopper 34. Figure - stock' prior to actual separation will ?rst be de scribed. Accordingly, reference' is primarily made to Figures 3 and 4, in which this mechanism is shown as being supported by the frame I. The foregoing being sufiiciently explanatory 50 as to the essential elements of the preparatory part of this mechanism, the separating elements of‘the invention will now be described and how 55 Power is supplied for operating the complete these two mechanisms coordinate to produce the machine from a common source-preferably an finished process. I electric motor 2, shown in Figure 1. By means The method of separation desired is preferably of a pulley mounted upon motor shaft 3, over carried out on the running gear 'of any of our which passes belt 4 and which extends over pulley pneumatic tables shown in the prior art, such 5, power is transmitted to shaft 3, which is the for instance, as that shown in Letters Patent No. 60 lower driving member of the speed-change trans 1,632,520, over which the present invention dis mission shown in Figure 13. On the opposite - end of the shaft 8, as shown in Figure 13 is located a pulley ‘I over ‘which passes a belt I, the latter also passing _over pulley 3 on shaft ~Ill. See closes several important improvements. ' In order that the present invention may be better understood, the running gear shown in the aforementioned patent is substantially repro Figure 3. Motion is thus transmitted to the shaft ' ' duced in Figure 5 of the annexed drawings. In I 0. Then by means of sprocket chain ll, ‘pass this figure, the chassis 4| is mounted upon the ing over suitable sprocket wheels located on the toggle. plates 42 which are inclined toward the ends of shafts Ill and I2, motion is further trans rear or source of ‘movement. These toggle plates 70 mitted to the lower helicoid mixing and convey are held securely in the toggle seats 43 by means 70 1 ing member I! which is mounted upon shaft l2. of the bolts 44, passing through the ends of The helicoid or ?ight conveyor I4 is also driven springs 45, which latter are in turn secured to from shaft l2 by means of the chain drive l5 the supporting frame 46. Adjustably mounted engaging in suitable sprocket wheels located on ' upon this chassis ‘is an air chest 41, as shown in the ‘outer ends of shaft vl2 and I6. ' Figure 14, in which both rear and front are 75 1 3 9,187,678 mounted on pivot bolts II, to permit of adjust-, the nature of the material desired to be sep ment of the lateral inclination of the air chest arated. 41 and the deck‘ surface 33, which is securely Rimes or partitions 14 are secured to the ribs 12 on the upper surface of the porous covering 13 by nails or screws passing through these rif mounted thereon. The range of lateral inclina tion is secured by means of the hand wheels 43, the shanks of which pass through the slotted fles and pervious covering and entering the ribs openings ill into the chassis ll. ‘I! therebeneath. ~ The proper inclination of the air chest 41 and deck surface 33 is secured by means of the 10 crank ‘I, which is mounted on the short shaft ' ' The general arrangement of the rif?es ‘I4 is shown in Figure 10. In this ?gure it will be observed that the ri?ies all start from the back 10 32, carried by the chassis member 33. The shaft > railing ‘l5 and extend toward the pointed‘ or 52 carries a pinion ll which engages the v)rack delivery end of the table 33. These rifiies are of 'unequal length, the shortest being near the feed ing' point'of the material to the table 33 and the 15 boot '3 to the intake pipe 31 which supplies longest near and parallel with respect to the de 15 air from the fan 33, the latter being shown only llvery'side of the table at ‘I6. In addition, the height of these rililes vary with their length, the in Figure 1. _ A ‘ butts where they terminate at the railing ‘I5 The entire chassis, air chest and deck sur face is reciprocated by means of the eccentrics have their greatest height and taper gradually to a feather edge where they terminate on the 20 20 33, through rods 33, which connect to the chas II on the side of the chassis member 33. The air chest 41 is connected by a ?exible intake sis as shown in Figure 5 particularly. These eccentric rods 30 are driven by means of ava riable speed-change transmission as shown in Figure 13; This transmission consists of-two re 25 verse cone pulleys 6| and 32. The pulley ii is driven by the pulley 5 (see Figure 1) by means ' of the belt 4, it being pointed out that the cone . pulleys ‘I are mounted upon the same shaft 3 30 which carriesthe large pulley 3. Motion is thus imparted to cone pulley 62 through belt 33, which is threaded through the belt shifter 84; blank space of the table. ' > An impervious metal or wooden section 11 '(see Figure 10) is mounted on the upper surface of the deck 33 and has openings 18 therein which lead into the air chest 41 under the pervious 25 deck surface 33. The air passing through these openings is regulated by the two small sliding gates 13. See Figure 8. The purpose of these openings is to supply air to two pneumatic blow ing bars or skimmers 80 (see Figures 6 and 7) 30 and extending approximately at right angles Shaft 35 carrying the eccentrics 39 is thus ro across the deck surface 33 in the manner shown tated to impart reciprocating motion to the rods in Figure 1. v The construction of these blowing bar skim CI.‘ The belt shifter N is mounted upon a threaded shaft 33 and by means of cranks 61 car vmers is shown in Figures 6 to 8 inclusive and in 35 Figure v'7, which is a cross section of the pneu ried upon either end of this shaft 63, an oper ator on either side of the machine may adjust matic skimmer 80, the latter is shown as being the position’ of belt 33 on the cone pulleys ii a tubular member extending transversely across the table 33 and by a suitable elbow 8| (see Fig and 82 to vary the speed of the upper cone pul ure 1). communication is effected between the 40 40 ley 62 and consequently predetermine the num ber of reciprocations of the table deck33 and its tubular member 30, through the openings 18 in , the deck 33, with the air chest 41. The lower associated elements. It is apparent that by mov ing the shaft 53 which carries the belt shifter portion of the pneumatic skimmer 80 has a slot ' 34, the idle pulley 63 carried by the belt shifter 82 underneath extending from one end to the other thereof and designed to] deliver a current 45 45 34 and which rests upon the belt 33, will per form the actual operation of moving the belt 33. of air substantially horizontally over the top of For the purpose of providing for the end ele , the main bed of seed so as to affect those par ticles which occupy the upper stratum only. vation of the air chest," and deck 33, the sup porting member 2 of the chassis is-hinged at a, An example of this is shown in Figure '7. In as shown ‘in Figure 5 so that the end opposite ' front of the slotted opening 32, is placed a guard this hinge may be raised and held in the desired 33 which is attached to the member 80 and ad elevation by means of the hand wheel 33. This justably arranged so that it may be lowered or hand wheel 39 is threaded on a bolt 10, the lat- ‘ raised as the circumstances may demand by ter passing through the slotted member ‘ll. Thus means of the threaded member 84 secured by its lower end to the guard 83 while its upper end 55 55 when the chassis part 43 is raised, then the tightening of wheel 33 secures it in the desired passes loosely through the supporting member A wing nut 83 bears upon the supporting . elevation. The general table and deck surface member 85 and by rotating the same, adjust is shown in Figures 9 and 10 and as stated pre ments of the- guard 83 may be obtained. viously is substantially the same in construc As apparent in Figure 6, the guard 83 has a 60' tion as that shownlin Patent No. 1,632,520. number of small deflectors 81 secured to its un The lower portion of the deck shown in. Figure der surface and which are inclined diagonally 9 is secured to the air chest 41 and is built up downward toward the discharge side of the table ‘with as number of longitudinal and relatively par deck surface 33.‘ The object of these de?ectors is allel ribs 12, approldmately in line with the re to prevent a lateral discharge of an air current 65 ciprocation of the eccentric rods 33 as shown caused by an accumulation of air between the in Figure 5. Over these ribs is disposed a porous underside of the guard 83 and the table deck textile material 13 of suillcient porosity that surface 33. The deflection of this air diagonally when air is supplied through theintake pipe 51, downward completely neutralizes this tendency. as shown in Figure 5, a certain amount of static pressure is maintained in the air chest 41. This In our prior Patent No. 1,632,520, we have 70 shown a form of pneumatic skimmer which uti porous textile material may be replaced by a sheet of finely punched metal, ?nely woven wire cloth or other foraminous material with equally surface and the'material upon it to repel or hold 75 as effective results, depending sometimes upon lizes» the air passing through the separating back certain undesirable elements ?oating on the bed of the seed stock being treated. -The 75 4 ., B, 137,678 di?lculty here was_ that when the pressure of air the elevator buckets 22 by means of the ?ight passing through the pervious table deck surface. conveyor l3, and deposits the same into the exceeded a certain amount, the air would then , blow both ways, forward and backward under these skimmers thereby disturbing the other ele ments undergoing separation. _ In the_pneumatic skimmerstof the present in— vention, this objectionable defect is completely eliminated and air which is supplied from a sepa 10 rate source as well as that which passes through trough 2! of the conveyor 13. Thus only the de sired amount of coating material is deposited for association with the dampened seed mixture in the trough 25. Within the trough 25, the seed mixture and coatingmaterial is mixed and con veyed by the conveyor H to a point of discharge onto the belt conveyor’ 26. The material is de posited onto this belt through the chute lll, as 10 the deck surface itself is utilized to give a greater apparent in Figures 1 and 3 and is elevated to a .area of action upon the objectionable ?oating ele point of discharge into the receiving hopper 32, ments of the mass treated than would be possible ' thence through. the ?exible conduit 95, shown in with the older type of pneumatic skimmers or detail in Figure 16 and onto the table receiving 15 blowing bars. This is effected by means of apply ing a regulated draft/of air through the slot 32 of the skimmer 30 so as to'force rearwardly or toward the feeding discharge side of the table surface 33, the currents of air arising therethrough feed pan 9!, from which'it is gently deposited 15 onto the separating table 33. The separation of the various elements of the mass is as follows. It will be noted from Figure 5 ~ that the action of the eccentrics 59 is to move the 20 and thus preventing a forward draft under the -air chest 41 and consequently the table separat 20 skimmer bars which would otherwise be fatal to their successful operation. The upper guard 88, shown in Figures 6 and 7, has no function other than. to de?ect toward the 25 feed end or rear of the table 33, such ?ne dust _ particles as may arise in front of and between the two skimmers 80 and to prevent such from set tling upon the other portion of the table surface where the clean seed are being graded and sepa 30 rated. » Having now outlined .the coordination of the a various parts of the invention, the process as car ried out thereby will now be described. It is men tioned however, that it is not herein considered new to effect separation of buckhorn or other ‘ mucilaginous ‘bearing seed from clover seed by simply wetting and coating with a comminuted ing surface 33 diagonally upward on the for- ‘ ward stroke and diagonally downward on the re turn stroke, due to the inclination of the toggle member 42, ‘ -' ( When the mixture is deposited upon the table 25 separating surface 33 after the manner described in the foregoing and a pressure of air supplied to the air chest 41 through the air conduit 51 which is connected to a suitable air supply source 58, the pressure of air within the air chest 41 30 causes the air to gently ?lter through the pervious deck surface 33. The action of the air under these conditions causes, ?rst; the entire mass so delivered to be strati?ed, the heaviest elements ' sinking to the ?oor of the table, such, for in stance, as sand and dirt clods; then the next and lighter elements, which will be the good sound material but the steps of the present process re seed; then next above that will be the coated ' lating to actual separation to be hereinafter more seed, dead seed and other light foreign elements 40 speci?cally de?ned are new in the art, and which ‘ and ?nally the upper strata will contain nothing include the steps of depositing the mass on a but the surplus coating material which is lighter 40 mechanically actuated deck to effect separation in weight than all of the remainder of the stock. by gravity, in stratifying the mass according to Then, by means of the suction hood 38, attached speci?c gravity of the elements of the mass by to the conductor pipe 39, this surplus coating ma terial is drawn off of the table surface 33 by 45 supporting the same on a cushion of air, in with _ drawing superfluous comminuted material by suc tion for return to its source‘ and simultaneously drying the same and in separately collecting the, seed at different points as they emerge from the 50 deck. The seed of the mucilaginous bearing character to be separated from the non-mucilaginous hear ing ones are fed from-any suitable source of sup 55 ply into the receiving hopper 88. See Figures 1, 3 and 4. Simultaneously therewith, asmall trickle of liquid, preferably water, is fed through the spigot 90 from the supply tank II. The liquid and the seed both entering the trough 32 of the con veyor unit ‘l4 and by means of this conveyor 14, the moisture is thoroughly andadequately dis tributed over the surface of each individual‘seed of the mass. The conveyor ll has cut away por tions b in its ?ight, as apparent in Figure 3 to permit a better ‘moisture distribution by‘ caus 65 ing a portion of the mass of seed to lag. The con veyor l4 delivers the dampened seed through the chute 93 into the end of the conveyor trough 2! immediately therebelow. ‘ It has been stated'previously that the hopper 70 34 receives coating material from the receptacle 3! thereabove and which material may be very ?ne sawdust or dry pulp of any suitable nature. The bucket elevator shown in Figures 3 and 4 picks up.the coating material which is transferred from the hopper 3! to,the point of reception by means of the suction action of the fan 36 as soon .45 I as strati?ed and'returned through pipe 40 to the collector 35 from which it is again, deposited into the coating material hopper 34 for re-u'se. In the meatime, the reciprocating action of the table 33 propels the heavier elements of the mass 50 forward from under the lighter ones, due to the fact that the upward and forward motion of the .deck surface has more contact-with the heavier elements than with the lighter ones, but with the top remaining stratum of coated seed‘and light 65 particles practically not at all and since the table surface 33 is transversely inclined at right angles to the direction of reciprocation, so as to dis- , charge its lateralicontent into the receiving hop pers 31, these lighter elements are entirely con-' fined to the space between the pneumatic skim mers II and the rear walls of the table ‘II. The importance of the pneumatic skimmers II is manifest at this point. Owing to the clinging nature of the coated elements of the mass and others to the stratum below them, they would report with the good seed, were it not for the. pneumatic action of these skimmers delivering a draft of air-rearward ortoward the feed side of 70 the table and opposed to their forward movement. The heavier elements of the mass pass underneath the pneumatic skimmers and ‘report upon the table separating surface in zones of separated ma terial. I'br'instance, clods of dirt and sand hug 75 .5 2,137,878 the‘ retaining or banking wall 98 and are dis charged through one of the upper gate openings 99. These gates 99 are attached to a shank Hi0, pivotally mounted through'the cross member I 0 I , so that they can be opened as desired and these rock and sand clods trapped out in the hoppers I02 and in order that the good seed will report in hoppers 91 as mentioned previously. In Figure 2 is shown diagrammatically the 10 path of the seed and of the complete mixture in the course of process according to the present What is claimed is: _ i 1. In apparatus for separating good seed from bad seed which are capable of retaining an artifi cial covering of comminuted material, the com-Q bination of a gravity separating‘ table having an inclined pervious deck, means for reciprocating said deck, means for maintaining a uniform up invention. In this figure, like characters of ref erence are employed to designate the elementsiof the invention shown more or less symbolically to take. the place of those illustrated more com ward pressure of air through said deck,.separate_ means for retaining comminuted material and a mixture ,of seeds, a mixing trough, a liquid con 10 tainer for supplying predetermined quantities of liquid to said mixing trough, means vfor trans ferring the mixture of seeds and 'comminuted material from said mixing trough to the receiv ing point of said deck, and means for delivering pletely in the other views. In this figure it will a current of air in a horizontal direction and op- , be observed that the mixture of desirable and undesirable seed is fed into the "seed dampener”; thence deposited into the "coater”, into which is simultaneously delivered the coating material. The dampened seed with the coating material are then deposited'upon the "pneumatic table sepa rator” which e?ects separation of vthe seed ac cording to their speci?c gravity. Surplus or ex cess coating material is removed from the sepa— rating table at the point of feed by suction and during its travel back into the coating material posed to the forward movement of the mixture ~' on_the ‘deck to repel movement of‘ the mixture according to ‘its speci?c gravity, means‘ for col-.~ lecting the thus separated seed, and means for 20 withdrawing from said deck the surplus com minuted material and for drying and returning \' same to its retaining means. 2. A machine and apparatus for separating mucilaginous from non-mucilaginous seed com 25' prising the combination with a reciprocating table‘ havingra pervious deck through which air collector, it. is dried to, a su?icient degree as to" - under pressure is forced, of a receiving and con; veying means for a mixture of seed, a moistening' reduce it to a condition for immediate re-use. It is important; in separating seed‘by wetting; means, means operative subsequent to the mix 30 and coating to insure against injury to the good ing of ‘the seed with a moistening medium for long, which has been found to discolor them and thereby reduce their market value. The present process is effective, as stated, brie?y in the pre amble, in practically drying the good seed in the ing .the characteristic of clinging to‘said mucila ginousseed, means for agitating theseed mix seed by keeping, themdn a moistened state too ' depositing into the mixture predetermined quan Ll titles of a dry and'finely divided material hav ture. with said ?nely divided material after its discharge‘ from the receiving and conveying means and preparatory to its transfer to said» deck in.even a better condition than they were , deck, means for‘ protecting the mixture against previous to separation, since they are cleaned and agitation as it is deposited onto'said déck,‘ means 40' course of separation by-‘the air to‘whichthe mass is subjected. Hence the seed leaves the “separator 40 polished. . > for withdrawing, drying and returning to its ' manifestly, the construction shown is capable original source surplus ?nely divided material for of considerable modi?cation and such 'modifica- . reuse. - HENRY M. SU'I'I'ON. tion as is considered within the scope and mean ing 0! the appended claims is also considered within the spirit and intent of the invention. i" ' . , EDWIN G. STEELE.