US2446130A - Combination drier and cleaner - Google Patents

Description

July 27, 1948. D. D. DAY

COMBINATION DRIER AND CLEANER 4 Sheets-Sheet 1 Filed Mrch 19, 1945 July 27,194 8. l 3.-D.DAY 4 2,446,130

' COMBINATION DRIER AND CLEANER Filed March 19; 145 I4 Sheets-Sheet 2 3mm Dewey D. Day

D. D. DAY

COMBINATION DRIER AND CLEANER July 27, 19.48.

' 4 Sheets-Sheet 3 File d'Mafch 19, 1945 gwuem/ho o Dewey D.Dag

Jul -27,1948. D. D. DAY 2,44 ,130! N v 5 COMBINATION DRIER AND CLEANER. Filed March 19,: 1945 v w 4 Shee tS Sheet 4 Patented July 27, 1948 sr :ErS PATENT time a Dewar-11). Day, Dallas,Tex lassignomtoiThew Murray Company, Ila Hag fl exm Application'March 19, 1945; Serial No. 583,616

This invention relates; to new and :useful immovements in combinationdriers and cleaners;

One-a object i of the invention is to provide an improvedcombinatiorr drier and cleaner especially adapted for-handling ,fibrous materials,. such as seed cotton and particularly arrangedfor condi tioning machine-pickedcotton. v A particular object :of the invention is-to provide an improved drier andccleanercinvolving-a circuitous travel path; for the seed cotton, whereby the damp or-wet cotton is caused tomove in reverse-courses while being: motivated by a'stream of heated air and subject'edto an efficient clean: ingaction at the end of each'courser A-vfurther objectofthe-invention is to provide 3 Preliminary drylngiarea wherein :the progressively; moving.;cotton is :carried'through an elongate circuitous path byia stream-of heated air to partially dry it before carryingnit through the cleaning area of the apparatus.

Another. object of the-iuvention is to provide an apparatus sof the character described wherein a: plurality of=cleaningncylinders are vertically disposed at- .each side of "the apparatus and the seed cotton traveling in acircuitous-patlr between these groups of cylinders, is-carried over cleaning surfaces beyond which-surfaces; air. escapes aretprovided: to more efficiently remove dust, fine trash and foreign matter fromfl-thercotton;

An important object of the inventionisto pro! vide a combined drier "and cleaner, wherein the fibrous material moves in: reverse transverse paths, while beingrmotivated by the heated-air stream, such paths each being? of substantial length; together with revolvingt'fanetypelcylinders-which setup suificientcentrifugal force to maintain aspeed. of'travelof the cotton adequate to prevent choking as well as to obtain-effective drying and at the-:same time permitting a sizeable proportion of'theairp'stream; to he exhausted. through the-cleaningscreens.

A'particular obiect ofi'the invention: is tO'QPO vide a combined l drier and cleaner r wherein; a plurality of fan-type revolving cleaning cylindersv are correlated withcot-ton conductor: shelves in such almannerthat each'cylin'der after receiv ing the cotton tromw an intermediate; shelf: and carrying it downwardly eover a cleaning surface;

casts the cleaned. cotton onto-'a l0wer shelf withoutoagain carrying said cotton ontoathe clean ingi surface. or repeatingthe i revolving.- cycl of said cotton, wherebmmachining; oninliury to the cotton. fibers is .substantially eliminated and i a positive dischargetof all. ,of-the cotton from each cleaningarea is obtained- A construction:designedczto c r y ventionz. her. hereinafter described: together with other features of the invention.

'I-heci-nventiomwill bemore readily understood from apreading of the:followingizspeclficationrand by, referenceh to: the. accomp'anyi-n'g i drawings, wherein an: exampleisof Stheinvention is. shown, and whereinaz Fig; 1 is c aperspectiveviewiofa combineditdrier and-cleaner apparatusconstructedrfirisaccordance with the invention, a

Fig. 2 is a- =l-ongitud.inal,:vertical-; sectional lview oi thezdriersandicleanen i n Fig; 3;,isa detailed: viewwot "onerof the-adjust able deflectors, l. i

Flea; l is ai antialllongitudinal; sectional [VIEW of a-'' modified formmof i drier: and iclean'err Fig; 5a is iaidetailed viewzofi: oneioflthercleamng grates and its correlatedmylindr;.partlyviniper speetive-and partlyiin section, I

Fig: 6- is a: transverse; sectional :vlew through oneof'theigrates, and" i i Fig: 7 i-s-aview "partly in elevation and: partly in section showing a cotton by-fpassi-ngt arrange: ment. I i l v In. the: drawings; the letter A designates i the combined 1 drier and cleaner: proper; Fig. 1, theidrier and cleaner isshown asi connected -bya flared, transverse? feed: duct Br. with across-blow beieC. Seed cottonais conveyed by air suction from a a; suitablevsource; into: ancaiitsandai cotton separator-i Di ot the rzusual types the aim currents passing-iofrzand theseedcottombeingcdropped'into thewblow box "by the-:ordinaryc revolving gate Ea Thehblowi box has an inletcf ta-vwhichna conductoni (notshown) may "be :connectediifombiovia ingtastream-i of iheatediair into and across said box, whereby the: falling. :cottonslis acarriedr into the duct I B eandr conducted eupwardiy tmthe top o fwthedrier and cleanerA'i The. bottom i of i the blow box opens into:- a by: pass hopper F which has a chute Gileadingdown t sthetlowerportion-of the: apparatus. :A and a divergent t ch'ute leading, down: to av vacuum hood I connected at one side to the discharge end ofthe drier and cleaner- A -'1he-: hoodxhas-ian open bottom, restingtupon' theatopt-rot an ordinary gin 'distributonJ; At the "juncture ofl' thezchutes G. andtI-I; a :by-passvalve F is pivotediianid may be swung; to divert the cotton into-Leither i chute. Thecurrent of the cross stream", of zh'eatd air flowing th'rough the box C will be strong enough tot carry. allof the falling cotton into the duct B; howeverg'a'c suitablecutaofl' valve E5 mayhe piv oted-in: the iboxibelow the duct; Bi th'e foregoing the vertical casing of the drier and cleaner, the

upper portion of which is reduced in width and forms a preliminary drying chamber or compartment N. This casing has upright side walls l6 and H, respectively, and front and'back walls l8 and I9, respectively. At each side of the casing, upright cleaning ducts or flues |2 .areformed;

The casing I0 opens into and is supported upon an elongate transversecleaner housing-l3 form'- ing part of the unit A. The housin i3 opens into a'transition I4 swhichis connected to'a flue I5 for-carrying off the cleanings from the housingl3.

i The duct B, wh'ichis flared upwardly discharges intooneside (right side Fig. 2) of the preliminary drying-compartment II. This duct extends substantially from the front wall l8 to the back wall H) of the casing and delivers the heated air and cotton in arelatively broad, flat stream. A plurality of flat horizontal shelves 20, 2| and 22 are suitably supported in the compartment The shelf'zllextends from the inlet toward the opposite side of the compartment. A transverse curved deflector 23 extends from the shelf 2| up to the inclined top 24 of the compartment and is spaced from the end of the shelf a sufficient distance to allow a free downward flow and discharge of they air and cotton-stream. The downwardly inclined top 24 aids in'diverting the air and cotton stream onto the deflector. The inner end of the shelf 20' overhangs the shelf 2| which latter terminates short of the upright right hand side wall of said compartment. Thisishelf 2| overhangs the shelf-22- which terminates short of'theleft hand side of said compartment. The shelf has an inclined Section 25 at one end which abuts the transverse apexof'a triangular deflector 26, onto which thecotton from the shelf 2| is discharged.

The seed cotton is carriedinto the compart ment I by the stream of heated air. This stream is heated. by suitable means before it is blown into the box C and its temperature may be varied in accordanc with the moisture content of the cotton. The air and cotton stream travels back and forth transversely of the compartment through the channels formed by the shelves 20, 2| and 22, and the cotton, while being carried through this elongated circuitous 'path is subjected to a preliminary drying Some initial drying of the cotton takes place in the duct B, but

the drying accomplishedin the compartment is more efiective.

The casing I0. is providedfwith anupper'horizontal shelf 21, a lower horizontal shelf 28 and intermediate horizontal shelves 29, all suitably spaced apart and disposed in staggered and'overhanging relation, whereby the cotton'may be 6115'- charged from one shelf onto the 'next lower shelf and carried by,'-and'withthe heated air stream, in a sinuous or. circuitous path through the drier; the shelves forming reverse channels therebetween.= I

y The cleaning ilues l2 at the side of the casing are defined by the sidewalls l6 and H, the front wall l8, the rear wall I9 and a plurality of vertithe underlying shelf.

cal cleaning screens 30. Each screen 30 is curved in a vertical arc concentric to the longitudinal axis of a correlated revolving cylinder 3|. The upper and lower ends of each screen abut the ends of alternate shelves, with an intermediate shelf terminating approximately in alinement with the transverse axis of the correlated cylinder. The ends of the shelves which terminate opposite" the cylinders may each have an upwardly' inclined transverse guide section 32 for the purpose of discharging the cotton on top of the cylinder.

The cylinders are suitably driven (not. shown) to revolve away from the guide sections; those at the right hand side of Fig. 2, revolvin clockwise and those at the opposite side,

" revolving counterclockwise.

Each cylinder is of the fan-type which is in common use in this art. Such cylinders not only carry the cotton over the screens 30, but create a fan blast which is discharged with the cleaned cotton along the underlying shelves. This is an important feature of thefinvention because it supplies a motivating force'which'propels the cotton toward the cylinder at the opposite end of the shelf and prevents choking in the channels between the shelves. The longitudinal blade portions 33 of each cylinder are provided withspaced stub pins orprongs 34, directed outwardly and radially of the cylinder. i 5

The cylinders are mounted so that the prongs sweep downwardly in close proximity to the arouate .surfaces'of the screens 30. By discharging the cotton on top of the cylinders it is carried downwardly and ejected onto, and blown along The prong-s 34 pass in such closeproximity tothe upper edges of the guide sections 32 as to prevent the cotton being carried upwardly therebeyond, thus the carrying of cot. ton around with the cylinder is substantially defeated.

Theparticular structure of the screens is subject to considerable Variation. While the screens 3!] are shown as of the mesh type in Fig. 2, it is to be understood that any foraminous or gratetype of screen may be used. Under the character of machine cotton picking, as 'done'at the date of this application, more satisfactory results have been obtained by using the grate-type of screen. In Figs- 4, 5 and 6, I have illustrated generally a grate-type of screen which includes a plurality of longitudinal spaced shafts 35, each having closely spaced arcuate fingers 36 extending therefrom and forming a grate surface. Each shaft has an adjusting arm 31- fastened to each end thereof and provided with a curved slot 38, through which fastening bolts 39 pass. The bolts are mounted on the front and back walls l8 and I9, respectively. I

In order that effective cleaning may be-accomplished, a proportionate amount of air is caused to pass through the screens 30 and exhausted through the fiues I2. The air currents in passing through the screens carry the cleanings into the dues. Angular aprons 40 are mounted transversely in the dues with their skirts 4| in engage-. ment with the lower longitudinal portions of the screens. The lower edges of the skirts are se cured to transverse angular rails 42 to which the adjacent edges of the screens are also attached; said rails being located at the ends of certain of the shelves 23 and 29. The skirts 4| close ofi the lower portions of the screens so that trash and dust'forming the cleanings, are caused to fall on the inclined aprons 40 when carriedinto theiflues.

The cleanings slide down the apron-s onto de aflectors .43.- .adjustably. mounted. at their endspn the. front, andbackawallsof. thecasing. .fIhe lower through which the cleaning operation may 2 be .observed.

.At .t-healower .end-vof the right handnflue d2 .(Fig-2),tthadeflector 43Qismounted in reverse relationto thede-flector thereabove so-a-s to deflect -the. cleaningsinto. a transverse screw conveyor 45 .which discharges .at: its rear; ends into a flue 46. TIl-heflue; i hat. the left-hand side of thecasing (Fig. 2 opens .at'. its lower end into transverse trunk. 47. {as .isshown inFig. 1. wThi-strunkudischarges. into a transition 48; from which ,a flue-49 extends. The lines 46 and 49 may be connected latasuitable point. tothefiue l5, if desired. The cleanings and air currents will pass directlydown .intothetrunkdlland thus,-a conveyer is not reaquireidat this sideof theapparatus.

.The..horizontalcleaner A" which is. connected tothe lower lend of thecasing I may be. of any suitablettype. The. cleaner housing ['3 extends .from theside of. the casing HIv under the conveyer .45. and the extension. is covered by atop plate :58, intowhich. the. chute Gis connected. A plurality tofifan=type cylinders similar to the. cylinders 3!. are mounted in the housing and revolve in a counter-clockwise direction. .Arcuatescreens 52 .Ldf the same type as the screens 30, are mountedr.

under the cylinders acrossthe housing. .C'otton discharged. from the lowermost cylinder.- 36' (Fig. .2) {is cast thereby-under the shelf 28 and falls upon the, cylinders .5l; also, somev of the cotton will fallndirectly .intowthecylinder 5|,v under such lowermost cylinderdl. This cotton, which has .been partially clea'ned by the cylinders-3| van'd .screens-..3il, will be carried through the cleaner A and thoroughly cleaned.

, [The housing It isconnected to, .and discharges res into-agate casing-53 at one side of the vacuum hood I. .A revolvinggate fid carriesithe cotton into the hood. The gate revolves ina-clockwise direction and prevents the air pressure .in the cleanerAlfrom escapinginto the hood.

i :In operation the seed cotton suppliedifrom \a suitable source to the separator D,.is dropped Joy thev revolving 'gate :E into the cross-blow box .0. :A stream of air heated to the proper temper- .ature is directed across the box through the inlet .0, andj-suppliedin-any-suitable manner. The particular temperatureltoxwhich the air-is heated depends uponuthe .dampness or wetness of' the cotton and such air may be warm or hot. "Tem- ,pera-tures ranging from atmospheric to 250 F'. have been .used satisfactorily.

The stream of heated air is blowninto thebox .Cwith suflicientforce tocarry the: cotton into andrupwardly through the duct Band thence throughthecompartment II. The cotton,'part1y in suspension and otherwise motivated :by the air stream is given a preliminary drying. 1 This dry- .ing action-is accentuatedlin the compartment where the cotton is carried back and forth through thegelongate reverse channels or path formed by the shelves 20,. 2|:and"22.

:The cotton -.leaving theshelfsZZ: iscarried-a'lon'g the shelf r2! and:.throughtazchannel for-med hetween said shelves 22 and 21. As the cottonappreaches -..the .s uppermost 1 cylinder 3|, it --is dc- 7 t6 .mflectedror .giuded- -ontosthe\top ef seidrcylinder nbyttheuinclinedt-sections at-dhe adjacent end .of-said shelf. 5 Thepins. 3kcarryithe cotton down .overttheesurfaoe of the.-;screen.;.3ll, rwherebytthe cotton is rpartially cleaned; -yloose uparticles gand dustheing. removed. nrportion of the ein stream masses-through the. screen, accordingto the-ad- Justment of. the uppermost deflector 43, thus more ei-Tectively cleaningthe cotton and carrying golf .the cleanings. l :The. cotton is then sweptrdown onto the uppermost shelf .29. Owing to the closure of thevlower portion ofthescreen by the skirt 4 l ,tt-herescape 1 of airtherethrough is substantially cut off which a releases .the cotton from the surface of the screen and permits it to be: freely carried onto the shelf Wallaby the cylinder. By reason of the foregoing aandthetproximity of the. guide section 32:to:.the circular; path of the pins;34,-laswel1--=as thewloo tion ofrsaid sectiomwith: respect to the; topvand .loottom of said cylinder. the cotton willnotrbe lagain carried around by the. cylinder. Thefanx type. of cylinder serves to step up the velocityzof a the air-stream as well as to impel the cottomalong ltheuppermostgshelflza The force thus generated is; sufficient to; move. the cotton and discharge itxontonthe." cylinderr 3l :at the opposite end ofithe sshelfxz 9. .By thus motivating the cotton-choking Hill the channels between the shelves is prevented; -a1so, the cotton is sufficiently agitated to hold it more 101 3 less sin 1 suspensionvin the heated: air

stream, thus intensifying the drying function.

:The cotton is carried back and forth: over. the remaining shelvessZS and cleaned by the cylinders 3 I. and then discharged onto the bottom shelf 28 .fromswhich it is delivered 'tothe lowermost cylin- -der3l (Fig. 2). By the time the cotton reaches :the: last cylinder. 3 I, it will be I thoroughly dried, butit wil1=still entrain.some trashand dust. "The cotton isfina'lly dischargedintuthe housing 13 -05 the cleaner A; The cotton in passing through the cleaner is thoroughly cleaned, the-cleanings "being carried downwardly through the. screens 52 by the airstream into the transition-M. The cleaner discharges the cotton onto therevolving ate 54- which casts it into the vacuum "hood I. In Fig;- 4;I- have shown anoth-erform of apparatus constructedin accordance with the invention. hastead of the deflectors'43, transverse re volvinggates are mounted in thefiues l2. The-longitudinal edgesof the blades of each gate *wipeacross atransverse'sealing stri 6| secured alongthej lower edge of the'adjacent apron .40. Q posite. each gate a vent opening 62 is provided injthe side wall of the casing. These openings arecontrolled by valve plates 63, each adjustably hinged to the end'wall of the casing .and overhanging the..inner .face of said endwall.

The. escape of air through the vents 62 is controlledwby' the valve plates. The gates 60011 the right hand side (Fig. 4) revolve in a counterclockwisedirection, while the gates .60 on the left-hand side (Fig. 4) revolve in a clockwise direction "and. thus .I'discharge the cleanings .down- 'wardlyin. the dues 12. The edges of the blades of the gates wiping over the strips 6| angl -upwardly of the inner faces of the valve plates 63. provide seals,.whereby'thecleaning aredropped andnot carried outwiththe vented aircurrents. "In"'Fig. 4,.the shelf construction is, somewhat altered in that the intermediate shelves .29 and the bottom shelf' 28 are illustrated as being -disposed-relatively above the centers of the cylinders 3|; and thusythe inclined guide sections 1132 are not required. Under-each cylinder a sub-shelf 64 is provided and connected with the shelf proper by an inclined guide section 65. The blast action produced by the cylinders impels the cotton alongthe sub-shelves, up the guide sections onto and 'along'the shelves, whereby it is discharged onto the cylinder at the opposite end.

The combination of the drying and cleaning elements of the apparatus not only provides more eflicient drying and cleaning, but produces a higher grade of cotton, particularly where machine picked-cotton is handled. Machine-picked cotton gathers an increased amount of leaf trash, stems, grass, vines and some cotton hulls. Where the cotton is damp or even wet, the cleaning problem is accentuated unless the cotton is thoroughly dried. By combining thorough drying and cleaning without machining, twisting and undue agitation or stringing out, of the cotton fibers, not only is the cotton better prepared for ginning, but ahigher priced ginned cotton is obtained. The terms used in the preceding sentence are well known in the cotton art. The feature of preventing the cleaning cylinders 3! from carrying the cotton over the screens 30, more than once, is highly beneficial as it prevents damage to the cotton fibers. Also, by utilizing the air blast of these cylinders to move the cotton along and between the shelves, not onlyis choking eliminated, but a more fluent flow of the heated air stream is obtained and the drying action is thus made more effective. I

In Fig. 7 I have shown an arrangement for bypassing overflow cotton from the distributor J around the drier and cleaner to prevent carrying such cotton through the drier, a second time. In ginning cotton with a battery of gins, quantities of seed cotton are discharged from the open end of the distributor during each run or ginning. bale, each batch is carried back into the system and introduced into the separator D. A hopper K is attached to the bottom of the gate E and provided with a spout L and an inclined chute M. The spout discharges into a revolving gate ,N which is mounted on top of the crossblow box C. A by-pass valve is pivoted in the hopper at the intersection of the spout and chute to cut off either of them.

The chute M is connected to an angular trunk P' which discharges into the outer side of the vacuum hood I. A yoke-shaped manifold R straddles the trunk and is connected with the inlet C of the blo'w'box, The manifold receives heated air from a suitable source. The chute H, hopper F and valve F are omitted and the chute-G is connecteddirectly to the bottom of the boXC.

In ordinary operation the valve 0 is swung to close off the chute M and the bottom of the box C is closed by the valve E. This allows the cotton to discharge from the separator D into the gate E and flow down through the gate E through hopper K and spout L into gate N, from which it is discharged into the box C. The operation from the box C is the same, as hereinbeforedescribed.

When it is desired to bypass overflow cotton, the valve 0 is shifted to close off the spout L and divert the cotton into the chute M. Owing to steep inclination of the chute M and the upright position of the trunk P, said cotton will readily slide down these conductors to the hood I, from whence it is discharged intothe distributor J .By this arrangement the cotton is not As such accumulations are less than a- "subjected to a second drying and cleaning and also, it is not necessary to close off the flow of the heated air.

If it is desired to clean cotton without drying it, the chute M is closed by the valve 0 and the valve E is swung up to close off the duct B and open the bottom of the box C, whereby the cotton will pass down the chute G and be cleaned as hereinbefore described. If the heated air supply is not cut off it will pass down through the chute G with the cotton and be discharged out through the screens 52. If the heated air is cut off, then the cotton will pass down through the Patent is:

T 1. A drier and cleaner including, an upright casing, means for supplying a stream of heated air and cotton to the upper portion of said casing, upright flues at each side of said casing, transverse overhanging shelves in said casing between said flues, cleaning screens between the ends of the shelves and the dues, and fan-type revolving cylinders mounted in the casing in position to carry the cotton over said screens and impel it along said shelves.

2. A drier and cleaner as set forth in claim 1, and means for exhausting a proportion of air stream through the flues.

3. A drier and cleaner including, a casing having an inlet at its upper portion for a heated air and cotton stream and an outlet at its lower portion, transverse communicating channels in the casing for conducting the air and cotton stream in a circuitous path generally downward from the inlet to the outlet, cotton cleaners at spaced vertical intervals in said path including screens and revolving cylinders, flues open to said screens, and means in said fines for controlling the discharge of air through said screens.

4. A drier and cleaner including, a casing having an airand cotton inlet at its upper end and a cotton outlet at its lower end, staggered transverse shelves disposed in the casing between the inlet and. the outlet thereof forming a circuitous air and cotton path through the casing, each shelf having one free end, and fan-type revolving cylinders mounted in the casing in said path on each side of the casing opposite the free ends of the shelves, whereby cotton is received upon each cylinder and discharged thereby onto an underlying shelf.

5. A drier and cleaner as set forth in claim 4, and an upright cotton cleaning screen contiguous to each cylinder.

6. Adrier and cleaner includingQacasing hav ing an air and cotton inlet at its upper end and a cotton outlet at its lower end, stag ered transverse shelves disposed in the casing between the inlet and the outlet thereof forming a circuitous air and cotton path through the casing, and separate cleaning compartments at the ends of the shelves on opposite sides of the casing, each compartment having an upright cleaning screen and a fan-type cylinder revolving therein for cleaning cottonand impellin'g cotton along said She1VeS..:-'-

'7. A drier and cleaner including, an upright casing having means for admitting a heated air and cotton stream, a preliminary drying compartment in the upper portion of the casing receiving the air and cotton stream having means for conducting the stream therein through a transversely elongated path, a circuitous conductor extending downwardly in the casing from the compartment and including impervious partitions and upright cleaning surfaces connecting the ends of some of the partitions, and fan type cylinders at opposite sides of the casing between some of the partitions and co-acting with the cleaning surfaces.

8. A drier and cleaner including, a casing having an inlet at its upper end for admitting a heated air and cotton stream and air and cotton outlets, a plurality of vertically spaced transverse shelves, certain of the shelves overhanging at one side of the casing and the intermediate shelves overhanging at the opposite of the side of said casing, fan-type cylinders between the overhanging ends of the shelves, cleaning surfaces between the overhanging ends of the shelves contiguous the cylinders, the ends of shelves intermediate the overhanging shelf ends terminating opposite said cylinders.

9. A drier and cleaner as set forth in claim 8, and air exhaust flues connected with the cleaning surfaces.

10. A drier and cleaner as set forth in claim 8, and means at the ends of intermediate shelves opposite the cylinders for discharging cotton on top of said cylinders.

11. A drier and cleaner as set forth in claim 8, wherein the ends of the shelves which terminate opposite the cylinders are each in such proximity thereto as to strip cotton from a cylinder.

12. A drier and cleaner including; an upright casing having a heated air and cotton stream inlet at its upper end; means for conducting said stream downwardly in the casing in a circuitous path comprising, elongate impervious partitions spaced one above the other having their ends staggered at each side of the casing, and upright cleaning surfaces connecting the overhanging ends of some of the partitions at each side of the casing; and fan type revolving cylinders between the overhanging ends of some of the partitions at each side of the casing coacting with the cleaning surfaces.

13. A drier as set forth in claim 12, and air exhaust means at the cleaning surfaces.

14. A drier as set forth in claim 12 wherein the ends of some of the partitions between the overhanging partition ends are opposite the medial portions of the cylinders for delivering cotton onto the upper portions of said cylinders.

DEWEY D. DAY.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 693,455 Stanley Feb. 18, 1902 1,187,287 Durda June 13,. 1916 1,909,951 Harris May 23, 1933 1,998,210 Underwood Apr. 16, 1935 2,102,499 Wallace Dec. 14, 1937 2,105,786 Henry Jan. 18, 1938 2,137,512 Steinhauer Nov. 22, 1938 2,214,680 Sims Sept. 10, 1940 2,224,625 Ahrens Dec. 10, 1940 2,332,413 Teague Oct. 19, 1943

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