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Патент USA US2411274

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Nov. 19, 1946.
Filed March 24, 1944
.2 >sheefßS-sheeHß 1
NOV. 19, 1946.
Filed March 24, 1944
2 Sheets-Sheet 2
. Inventor'
Patented Nov. 19,A` 1946
A 2,411,274
- Louis Kerían, Grafton, N. Dak.
Application March 24, 1944, Serial No. 527,948
1 Claim.A
This invention relates to a machine for sorting
objects, such as fruits and vegetables, as to size.
The primary object of the invention is to pro
vide .a novel machine of the above' kind `which is
comparatively simple and durable in cons-truc
.ti-on,> economical and easy to 'manufacture and
use, and highly efficient in operation.
More specifically, the present invention con
templates the provision of a sorting machine in
cluding spaced endless guideways affording a hor
izontally elongated vertical orbital path having a
ñat upper portion, a continuous series of hori
zontal rollers disposed transverselyof said path
and bridging and guided by said guideways,
Figure 5 is an enlarged fragmentary sectional
detail View taken on line 5-5 of Figure 1.
Figure 6 is an enlarged fragmentary elevational
view showing .a portion of one of theworm shafts
embodied in the means for moving and varying '
the spacing of the> rollers and the upper portion
of the path of travel thereof.
Referring in detail to the drawings, 5 indicates
a suitable horizontally elongated frame, longitu
dinally of and within which are mounted a pair
of spaced endless guideways, each «consisting of
uniformly spaced inner and outer guide rails 6
and 1. The guideways are vertically disposed and
have ilat upper portions which are preferably in
‘means to cause the rollers .to move in the orbital 15 clined upwardly and rearwardly from the feed
path including means to variably spaoeïthe rollers
end to the discharge end of the machine, as shown
while causing them to travel in the flat upper
in Figure 1. Thus, the guideways define a ver
portion of the path so that objects of various
tical, .horizontally elongated endless or orbital
sizes will be allowed to pass downwardly between
path having a flat upper portion, .and guided »by
adjacent rollers at different points in the flat up 20 these guideways for movement in this path are
per portion of the path, and means to catch the
an endless series of rollers 8 that bridge the spaces
respective sizes of objects as they Iare sol sepa
between the guideways and are horizontally dis
rated or sorted. The flat upper portion Aof the
posed transversely of the latter. As shown, the
path is preferably‘inclined upwardly and rear
Vrollers 8 have axial shafts 9 that project atop,
wardly from the feed .to the delivery end of >the .n Dosite ends of the rollers and extend between‘and
machine to afford an arrangement whereby Athe
outwardly past .the guide rails 6 `and 1.
rollers may gravitate Vfrom the discharge end of
, ‘Disposed longitudinally of and journaled in
the upper portion‘of the path and force the suc
bearings l0 at opposite sides of the frame out
cessive rollers into position at the lower receiving
wardly Aof the guideways 6, 1 parallel with the
end of the horizontal portion of the path by the
flat upper portions of the latter are worm shafts
weight of succeeding rollers. Also, the arrange
VIl whose threads I2 gradually increase in pitch
ment is such that the rollers are moved in the
from the lower receiving to the higher discharge
horizontal upper portion of the path Vso as to
end of the machine. Alsofas `more clearly‘shown
gradually increase the spacing of the rollers as
in Figure 6, the threads of theV shafts il are
they move from .the receiving or feed end of the 35 grooved, as at I3, to receive the ends ofthe roller
machine to the discharge end thereof..
shafts 9. Accordingly,` when the `shafts Il ""are
Other objects and featuresof the invention will `
turned, the rollers 8 at the upper portion of the
become apparent from the following description
path or guideways are caused to travel longi
when considered in connection with .the accom
tudinally of the machine from the lower receiv
panying drawings, and the invention consists in 40 ing end to the upper rear discharge end there
the novel form, combination and arrangement
of. At the same time, >the rollers are given a
of parts hereinafter more fully described, shown
differential movement so thatthe spacing there
in the drawings and claimed.
of is gradually increased as the rollers travel to- ‘
In the drawings, wherein like reference char
ward the discharge end of the machine. This is
acters indicate corresponding parts throughout 45 illustrated clearly in Figure 2, and it will be
the several views:
apparent that objects of various sizes, within cer
Figure 1 is a side elevational view of a sorting
machine constructed in accordance with the
‘ tainr limits, will be allowed to pass downwardly
between the rollers at different points along the
upper portion of the guideways or path. Due to
Figure 2 is a longitudinal section taken on line 50 the inclination of the upper portion of the path
2-~--2 of Figure 1.
or guideways, the rollers will fall by gravity at
Figure 3 is anenlarged transverse section taken
the discharge end of the machine into the down
on line 3-3 of Figure 1.
' Y
wardly curved lower portion of the guideways or
Figure 4 is a fragmentary section taken on line , path as the shafts of said rollers disengage from
4-4 of Figure 1,
55 the grooved threads of the Worm shafts Il. In
present invention.
upper portion of the orbital path, and these dif
ferently sized objects will be selectively received
this way, the successive rollers are forced up
wardly into position for engagement with the
Y in different> ones of the troughs 2D.
worms of shafts I I at the lower receiving end of
the machine, by the weight of the succeeding
rollers. However, it will be obvious that posi
tive means may also be provided to feed the
still larger objects may pass from the rollers at
the discharge end of the machine into the end
chute 2|. As the rollers disengage from the
threads of the shaft II at the discharge end of
rollers into position,- in which case the flat upper
the machine, they will pass downwardly by grav-~
portion of the'path could be horizontal instead
ity in contacting relation within. the ,lower down- ¿
of inclined.` >The guide rails `Ii and 'I may have
any suitable supporting .brackets I4 and spacing 10 wardlylcurved portion of >the guideways. At the
same time, rollers will be constahtly'fed upward
brackets I5.
Disposed longitudinally of the frame inwardly .ly into position for engagement with the worm
of the flat upper portions of the guideways are‘ ` shafts by the weight of the rollers therebehind,
thustinsuringia continuation of this cycle of op
`tracks I6 on which the ends of the rollers 8 >'are
disposed. The outer guide rails 'I hold the roll 15 eration as long-as the motor I1 is used to drive
ers against these tracks with suñìcient friction-`
to insure rotation of the rollers-as theyrtraveli‘..
the worin'shafts.
any suitable means, such‘as amotor I'I.V mount
edupo‘nlthe re'arïupperportion of. the frame 5Y
templated,v such as fairly fall withini'thespirit
¿_ »From¿the.-foregoing description it is believed
that1 the construction and operation, as well as
upwardly and rearwardly along the tracks I6.
The ends of the rollershafts 9 will of course I the advantages of the present invention, will be
rotatably engage in thevgrooves I3 of the worm 20 readily understood and appreciated by those
skilledï inthe art.,` Minor changes in details of
shafts II ¿to «permit-this.' -ßí'IfheY worm shafts II
construction illustrated and'íde‘scribed: are >con
may be- driven in any suitable' manner and by
and scope of the invention as;claimed.'f; „ .,
andan endless sprocket chain vI8 >passing around 25
_ sprocket wheels fixed onthe‘powerishaft of mo
tor I'I and the rear endsvo‘f worm shafts II.,v A
suitable feed hopper I9'>r may vbe "mounted on the
frame at the lower receiving fory feeding end there
of, in position toïdischarge- therobjects to be
guideways, said rollers having shafts~ whose ends
project outwardly betweenyand beyond the guide
passl downwardly between theV rolle'rs‘ß during
rails of the guideways, and meansto'causemove
ment of-the rollers in said ipath ¿including worm
shafts having threads provided with- Vgrro‘oves‘re
incline in this directionl tojfa'cilitate bagging of
the vobjects’ asëlthey are. sorted; “Objects which
are of'maximur?i‘s'ize and may‘not pass between
the rollers 8 at'any time willbeïdischarged _1on
gitudinally at the discharge end of the machine
where a suitable chuteüZI maybe mounted to
ceiving the lends of the rollershaftsat thegup-p-ër
`portion of the path, said` worm shafts; being `jour
naledA longitudinally of and at Opposite sides' of
the frame parallel with thegupperportionsiof the
rails, a continuous series of rollers disposed trans- Y
the sorting operation. These chutesmay‘extend
laterally beyondïo?e Sideof ‘fthe machine vand
versely of and-bridging thespace betweenthe
to receive-the respective „sizes of objects which
’ Y
upper portions andV definingY a verticalforbital
-Suitable'transversev 'chutes 2(1.may >be mounted
path having a flat upper portion, eachV guideway
including uniformly spaced inner and» outer guide
f ' '
beneathV the 'flat upperV portions of’the guideways
A sorting'.machine ofthe-'character described
comprising a horizontally elongated frame, spaced
vertical and horizontally' elongated guideways
mounted longitudinally ofrand within therframe,
30 said guideways being endless and >having flat
sorted'upon the rollersf8 at'the lower receiving
end of the upperorflat'path‘portion.>
WhatI claim is:
' In operation, the motor I1 is started and a batch
guideways, the threads of `said..W._orm shafts grad
ually 'increasing in pitch in a direction Ycorre
sponding to the kdirection of movement `of lthe
rollers, ‘the -upper portions ofthe guideways-being
of objects’is placed in the hopper I9 so that they
inclined' upwardly, the inclination' being; sufficient
may feed by gravity onto the rollers i8 ¿at the
’lower forward receiving end of the machine._ As 50 `to, cause ,theVv rollers to be-fed to theforward part
`0fV the machinerand thegthl‘eadsof thejgwogrm
the rollers >are moved rearwardly-by thejworrn
shafts terminating nearthe rear-.ends of the-»up
shafts II, theyV are also‘caused to turn by en
per portions of the guideways-wherebyjthe_rollers
gagement withlthe tracks Iii and will be grad~
'may> pass J`by. gravity from the upper 'porltiohsof
ually increased'inspacing by the form 'of` the
threads on said worm shafts II which are en»Í
Lthe‘ guidew'ays~ to the _lower , portions thereof ¿for
gaged in the groovesv by the ends of the roller
shafts 9i Obviously;V as the above. takes place,
forcing the lrollers successivelyupwardly into 4p0
sition .to-engage the threads >of the` wormsh'afts
objects `of various sizes, within predetermined
limits, may pass downwardly between‘adjacent
rollers 8 atdifferent points along the horizontal 60
at‘th'e lower ends of thelatter.
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