US3866752A

US3866752A - Inclined endless screen belt with transverse bar

Info

Publication number: US3866752A
Application number: US219452A
Authority: US
Inventors: Oliver K Hobbs
Original assignee: Individual
Current assignee: Individual
Priority date: 1969-12-08
Filing date: 1972-01-20
Publication date: 1975-02-18
Anticipated expiration: 1992-02-18

Abstract

An apparatus adapted to separate peanuts from grass, vines, dirt and other waste material combines a sloping rotating continuous belt having recesses therein adapted to trap the waste material and carry it away as the peanuts roll down its sloping surface with baffles or curtains, a barrier or reservoir across the lower end of the belt and screening means to remove substantially all of the material which remains with peanuts after harvesting.

Description

United States Patent [191 Hobbs *Feb. 18, 1975 INCLINED ENDLESS SCREEN BELT WITH TRANSVERSE BAR [76] Inventor: Oliver K. Hobbs, Box 1306, Suffolk,

Va. 23434 [*1 Notice: The term of this patent subsequent to June 6, 1991 has been disclaimed. [22] Filed: Jan. 20, 1972 [21] Appl. No.: 219,452

Related U.S. Application Data [63] Continuation of Ser. No. 882,846, Dec. 8, 1969, Pat.

[52] U.S. Cl 209/12, 209/92, 209/267 [51] Int. Cl B03b 7/00 [58] Field of Search 209/429, 430, 470, 485,

[56] References Cited UNITED STATES PATENTS 10/1885 Moffitt 209/485 X 11/1929 Lide 209/430 X 10/1947 Muir .1 209x92 3,013,660 12/1961 Davies 209/92 3,667,599 6/1972 Hobbs 209/92 FOREIGN PATENTS OR APPLICATIONS 28,686 8/1930 Australia 209/470 321,402 3/1954 Switzerland 209/1 602,747 12/1925 France 209/92 Primary Examiner-Robert I-lalper Attorney, Agent, or FirmClelle W. Upchurch [5 7] ABSTRACT An apparatus adapted to separate peanuts from grass, vines, dirt and other waste material combines a sloping rotating continuous belt having recesses therein adapted to trap the waste material and carry it away as the peanuts roll down its sloping surface with baffles or curtains, a barrier or reservoir across the lower end of the belt and screening means to remove substantially all of the material which remains with peanuts after harvesting.

9 Claims, 5 Drawing Figures PATENTED FEB] 8 i975 This application is a continuation of my application Ser. No. 882,846 now US. Pat. No. 3,667,599, filed Dec. 8, 1969.

This invention relates generally to separators and more particularly to an apparatus particularly advantageous for separating peanuts from other materials such as grass, weeds, dirt and the like.

It has been proposed heretofore to provide an apparatus for separating peanuts from those waste materials which remain therewith after harvesting. None of the heretofore apparatus have been entirely successful, however, because, they cannot rapidly separate all the grass, weeds and the like from the peanuts. An apparatus for separating cracked shells from nut meats is disclosed in US. Pat. No. 2,318,976 but such an apparatus will not satisfactorily separate peanuts from all of the grass, etc. remaining with them after harvesting.

It is, therefore, an object of this invention to provide an apparatus for separating a mixture of materials of different particle size and/or configuration. Another object of the invention is to provide an apparatus which is particularly advantageous for separating vines, weeds, dried grass, dirt and other materials from peanuts still in the shell.

Other objects will become apparent to those skilled in the art from the following description with reference to the accompanying drawing in which:

FIG. 1 is an elevational view, partially in section, of an embodiment of the invention taken along the line 1-1 of FIG. 2;

FIG. 2 is a cross-sectional view taken along the line 22 of FIG. 1;

FIG. 3 is a fragmentary plan view of a preferred continuous belt used in the embodiment of FIG. 1;

FIG. 4 is a fragmentary plan view of another type of a continuous belt used in an embodiment of the invention; and

FIG. 5 illustrates a preferred type of screen used in accordance with the invention.

The objects of this invention are accomplished by providing an apparatus for separating various solid materials of different granulation or configuration which is particularly advantageous for cleaning peanuts after harvesting. The apparatus combines a continuous belt having pockets in the surface thereof adapted to entrap grass, particles of peanut shells, dirt and the like but not peanuts which are still in the shell. Additional cleaning is provided by means of baffles or curtains which permit passage of peanuts but not the waste material and by a barrier at the end of the continuous belt. A screen is also provided for removal of any fine material remaining with the peanuts after separation from most of the contaminating material on the continuous belt. Hence, the apparatus combines a rotating inclined continuous belt with a rotor, flexible baffles. a rigid barrier and a screen which remove any material remaining with the peanuts after they have rolled down the inclined surface of the belt.

Referring now to the drawing. an elongated sheet metal enclosure 1 is formed by top plane 2, bottom panel 3 and side-walls 4 and 5 and is supported by a suitable frame at an angle of about 45 above horizontal. Input duct 6 permits the introduction of material to be separated into enclosure 1. Continuous elliptically shaped rubber belt 7 rotates in a loop-shaped path about longitudinally spaced rollers 8 and 9 journalled at their ends in sidewalls 4 and 5. An electric motor or other suitable source of power is used to rotate one of said rollers 8 or 9 counterclockwise as indicated by the arrows in FIG. 1 and thereby drive belt 7. A plate 10 rigidly secured to sidewalls 4 and 5 supports the upper portion of belt 7 against sagging. Plate ll of sheet metal, plastic or the like rigidly secured to sidewalls 4 and 5 covers the lower end of belt 7. The upper edge of plate 11 has an upwardly extending flange I2. Preferably, the upper edge of flange 12 is bent over to provide a lip 13.

As shown in FIG. 5, a plurality of transversely spaced rigid fingers or wires 14 are secured at their upper ends to a transverse plate 15in a form resembling an enlarged wire comb. Plate 15 lies under the lower edge of plate 11. Fingers 14 are unsecured at their lower end. A second row of transversely spaced fingers 16 are secured at their upper end to a rigid transverse plate 17. Plates l5 and 17 are bolted to plates 11 and 32. The two sets of fingers 14 and '16 form a screen through which any fine material passing over plate 11 will fall. The upper portion of belt 7 combines with plate 11 and the sets of fingers l4 and 16 to separate enclosure 1 into an upper compartment 19 and lower compartment 20. The lower end of fingers 16 are unsecured and extend over bottom 21 of discharge spout 22.

Spout 23 discharges material from compartment 20. A doffer 24 journalled in sidewalls 4 and 5 rotates at about 1200 revolutions per minute above belt 7. A flexible rubber curtain 25 is rigidly secured to top plane 2 and hangs downwardly to the upper surface of belt 7. A second curtain 26 spaced longitudinally from curtain 25 is also rigidly secured to top panel 2 and hangs downwardly to a point near the surface of belt 7.

As shown best in FIG. 3, the exposed surface of belt 7 is corrugated. In the preferred embodiment of FIG. 3 parallelepiped shaped protuberances 27 having a rectangular exposed surface are spaced over the surface of belt 7 to form recesses 28. Alternate transverse rows of protuberances 27 are regularly spaced one after the other in the longitudinal direction. Intermedi- 7 ate transverse rows of protuberances 27 are also regu? larly spaced. one after the other in the longitudinal direction but are displaced transversely so that the prom-- berances 27 of any one transversely extending row will bridge the space between the protuberances 27 of the two rows adjacent thereto, as shown in FIG. 3.

In another embodiment of the invention shown in FIG. 4, the exposed surface of belt 7A is provided with oblique ridges 30 and 29 which intersect each other to form diamond shaped pockets or cavities 31 therebetween.

The spacing of protuberances 27 and of ridges 28 and 29 are predetermined to provide cavities or recesses over the surface of belt 7 which are smaller than the product to be discharged from spout 22 but of such dimensions that the material to be discharged from spout 23 becomes entrapped therein.

As illustrated best in FIG. 2,

shields

30 and 31 rigidly secured at top and bottom to sidewalls 4 and 5, respectively, overlap the edges of belt 7 to prevent an accumulation of material. Shields 30 and 31 extend along sidewalls 4 and 5 from just beyond one end of belt 7 to just beyond the other end asshown in FIG. 1. The bottoms of

shields

30 and 31 are substantially parallel with belt 7 and are spaced only a short distance therefrom.

In operation, peanuts or other desirable product mixed with waste materials such as dirt, weeds, grass, peanut-shell scrap or the like are introduced over the surface of belt 7 through spout 6 at a point about midway the length of the belt. The upwardly moving belt entraps dirt, grass and other small material in the pockets of its surface while the peanuts are prone to roll down the belt towards spout 22. However, some peanuts may be carried upwardly by material on the surface of the belt. The doffer is rotated at a fast speed creating an air current which tends to blow the peanuts back and prevent them from being carried over the upper end of the belt. The volume of air available to doffer 24 can be regulated by positioning the doffer with only a part of its flaps extending above

sideplates

30 and 31 and with its ends fitting closely against the sideplates. In this way, the space between the ends of the rotor and sidewalls 3 and 4 above

sideplates

30 and 31 provides most of the air circulated by the doffer. Too much air will result in waste material being blown out of the pockets in the belt. Preferably, doffer 24 is rotated at a speed of from about 800 to about 2400 revolutions per minute. The material trapped on the corrugated surface of the belt falls off as the belt moves around roller 8. This material slides down through compartment and out through spout 23. Flow of finegranular weight and lightweight dried grass and the like downwardly over the surface of belt 7 is prevented by curtains and 26. These curtains are thin sheets of flexible rubber or plastic and move under the weight of peanuts. The peanuts roll over the surface of belt 7, over flange 12, plate 11 and fingers l4 and 16 and out of the separator. Any grass or other contaminant which passes

curtains

25 and 26 will be stopped by flange 1-2 or will fall through the openings between fingers l4 and 16. The peanuts are collected from spout 22.

With some materials such as bark mixed with dirt, splinters and sawdust, fingers 14 are not always required. The sawdust and other contaminants are separated sufficiently from the belt so the fingers are not used. Preferably, enclosure 1 slopes from about to about above horizontal with an angle of about 44 being best for bark, about 47 for peanuts and about 50 for corn. The belt should preferably move at a speed of from about 600 to about 2000 feet per minute.

Although the invention has been described in detail for the purpose of illustration, it is to be understood that such detail is solely for that purpose and that variations therein can be made by those skilled in the art without departing from the spirit and scope of the invention except as it is limited by the claims.

I claim:

1. An apparatus for separating particles which will roll from particles which will'slide down an incline comprising a continuous belt looped about longitudinally spaced rollers, said belt having an inclined upper reach with one end elevated above the other end and a surface adapted to support said particles, means for driving the belt with the upper reach moving towards its elevated end, said surface having upstanding ribs with spaces therebetween adapted to trap only some of said particles, an upstanding bar disposed across the belt adjacent to its said other end which prevents particles from sliding from the said other end of the belt but permits rollable particles to roll thereover, and means for collecting all of the particles which roll over the said bar.

2. The apparatus of claim 1 wherein said bar means includes a flanged'plate lying in a plane substantially parallel with the longitudinal axis of the belt.

3. The apparatus of claim 1 wherein said bar includes lip lying in spaced relation above the plate and extending in the same longitudinal direction.

4. The apparatus of claim 1 wherein the belt surface has a plurality of spaced protuberances with pockets therebetween.

5. The apparatus of claim 1 wherein the belt surface has a plurality of intersecting ridges with cavities therebetween.

6. An apparatus for separating particles which will roll from particles which will slide down an incline comprising a continuous belt looped about longitudinally spaced rollers, said belt having an inclined upper reach with one end elevated above the other and a surface adapted to support said particles, means for driving the belt with the upper reach moving towards its elevated end, said surface having upstanding ribs with spaces therebetween adappted to trap only some of said particles, an inclined plate overlapping the lower end of the belt for supporting particles discharged from the lower end of the belt, an upstanding bar disposed across the belt adjacent to the upstream end of the plate which prevents particles from sliding from the belt over the plate but permits rollable particles to roll thereover, and means adjacent the downstream end of the plate for collecting all of the particles which roll over the said bar.

7. An apparatus for separating particles of different sizes which comprises an elongated enclosure having a top, bottom and sidewalls, said enclosure being inclined from horizontal and having a lower end and an upper end. a continuous belt looped about longitudinally spaced transversely extending rollers disposed in the housing, said belt having an upper reach extending transversely through saidenclosure from adjacent one sidewall to adjacent the other sidewall, the upper surface of said reach having a corrugated surface with re cesses adapted to receive less than all of said particles, a plate extending transversely through said enclosure rigidly secured to each sidewall thereof and covering the lower end of said reach, said plate extending downwardly from said reach towards the lower end of said enclosure, an upstanding transverse bar at the point where said plate and reach meet to retard flow of material towards said plate, the upper reach of said belt combining with said plate to separate the enclosure into longitudinally extending upper and lower compartments, means for introducing said particles to the corrugated surface near the midpoint of the reach, a doffer above said reach near its upper end, spaced curtains secured to said top and dropping to adjacent said reach, one of said curtains being just below where said particles are fed on said belt, means for rotating said belt with the said reach moving toward the upper end of the enclosure, and a discharge spout for collecting substantially all of the material which flows over the bar and discharge it together from the said apparatus.

8. The apparatus of claim 7 wherein a shield extends inwardly over each edge of the belt and the upper reach of the belt is supported against sagging under the weight of particles thereon.

an upstanding bar across the belt along the upstream end of the plate which forms a barrier over which material not entrapped in said pockets may flow but which prevents free flow of material from the belt over the plate, and a discharge spout adjacent to the downstream end of the plate for collecting substantially all of the material which flows over the said bar.

Claims

1. An apparatus for separating particles which will roll from particles which will slide down an incline comprising a continuous belt looped about longitudinally spaced rollers, said belt having an inclined upper reach with one end elevated above the other end and a surface adapted to support said particles, means for driving the belt with the upper reach moving towards its elevated end, said surface having upstanding ribs with spaces therebetween adapted to trap only some of said particles, an upstanding bar disposed across the belt adjacent to its said other end which prevents particles from sliding from the said other end of the belt but permits rollable particles to roll thereover, and means for collecting all of the particles which roll over the said bar.

2. The apparatus of claim 1 wherein said bar means includes a flanged plate lying in a plane substantially parallel with the longitudinal axis of the belt.

4. The apparatus of claim 1 wherein the belt surface has a plurality of spaced protuberances with pockets therebetween. 5. The apparatus of claim 1 wherein the belt surface has a plurality of intersecting ridges with cavities therebetween.

7. An apparatus for separating particles of different sizes which comprises an elongated enclosure having a top, bottom and sidewalls, said enclosure being inclined from horizontal and having a lower end and an upper end, a continuous belt looped about longitudinally spaced transversely extending rollers disposed in the housing, said belt having an upper reach extending transversely through said enclosure from adjacent one sidewall to adjacent the other sidewall, the upper surface of said reach having a corrugated surface with recesses adapted to receive less than all of said particles, a plate extending transversely through said enclosure rigidly secured to each sidewall thereof and covering the lower end of said reach, said plate extending downwardly from said reach towards the lower end of said enclosure, an upstanding transverse bar at the point where said plate and reach meet to retard flow of material towards said plate, the upper reach of said belt combining with said plate to separate the enclosure into longitudinally extending upper and lower compartments, means for introducing said particles to the corrugated surface near the midpoint of the reach, a doffer above said reach near its upper end, spaced curtains secured to said top and dropping to adjacent said reach, one of said curtains being just below where said particles are fed on said belt, means for rotating said belt with the said reach moving toward the upper end of the enclosure, and a discharge spout for collecting substantially all of the material which flows over the bar and discharge it together from the said apparatus.

9. An apparatus adapted to separate materials of different sizes and configurations comprising a continuous belt inclined with one end lower than the other, said belt having an exposed surface which is corrugated to form pockets therein adapted to entrap only some of the material, means for moving the belt with the exposed surface travelling from the lower end towards the other end, a plate overlapping the lower end of the belt, an upstanding bar across the belt along the upstream end of the plate which forms a barrier over which material not entrapped in said pockets may flow but which prevents free flow of material from the belt over the plate, and a discharge spout adjacent to the downstream end of the plate for collecting substantially all of the material which flows over the said bar.