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Патент USA US2137678

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Nov. 22, 1938.
Filed Jan., 26, 1934
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Nov. 22, 1938.
2,137,678 .
- Filed Jan. 26, 1934
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Nov. 22, 1938.
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1476113171 ?SieG/é
' Patented Nov. 22, 1938
PATENT \ orrlca '
2,137,678 "
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,
?rst: The provision of means for moistening a
mass of seed, preferably with water, containing
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
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.
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.
' /
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.
' 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
. _
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.
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
separating table.
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
tegial from the deck of the pneumatic separating
a le.
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
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
. 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
.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.
- 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
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.
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
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.
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.
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
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.
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
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
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
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
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
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
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:
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
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
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- .
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.
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