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Патент USA US2106341

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Jan. 25, 1938.
2,106,341 y
Filed April 22, 1935
2 sheets-sheet 1
Jan. >25, 1938.
Filed April 22, 1935
2 Sheèts-Sheelt 2
Patented Jan. 25, 1938
Frank W. Cutler, Portland, Oreg., assignor to
Food Machinery Corporation, San Jose, C‘alif.,
a corporation of Delaware
Application April 22, 1935, Serial No. 17,646 l
1 Claim.
This invention relates generally to the grading
art, and is particularly concerned with certain
improvements in apparatus for grading articles
according to size.
A general object of the invention is to provide
a grading apparatus especially adapted for use in
rapidly grading fruits or the like according to
size with minimum or no injury thereto.
A more specific object is to provide a grading
apparatus in which the grading operations are
confined to predetermined grading Zones sepa
rated by intervening non-grading zones, and
having associated means for collecting and dis
charging the graded articles so arranged that
15 the grading and discharge are effected in sepa
rate zones.
Further objects will become more apparent
from the following detailed description of a
conc-rete embodiment ’of the invention taken kin
20 connection with the accompanying drawings
wherein like reference characters denotev like
parts throughout the several views:
Figure 1 is a plan view of a fruit sizing appa
(Cl. 209-102)
rail 6, and the’bars 5, 5’.
The aprons are secured
to, and driven by three endless chains 9, the two
outermost of which are arranged to travel in
channel rails I0, mounted above the sectional
sizing rails, and the innermost of which runs in 5
a groove II, extending along the upper edge of
the central grading rail 6. All three chains are
trained around sprockets I 2 secured to idler shaft
i3 at one end of the machine, and sprockets lll
secured to driven shaftI I5 `at the other end of the 10y
machine. The shaft I5 is driven yby means of a
chain It from a power shaft Il which is provided
with a driving pulleyl I8 `to which power may be
supplied from any suitable source to drive the
chains and aprons in the direction indicated by
the arrows.
It Will be understood that, in operation the bars
5,v 5',' are so adjusted that the width of the
grade-ways progressively increases from the re
ceiving end of the machine toward the other end,
so that as the fruit is carried along the grade
ways the individual pieces arereleased at various
points therealong according to their size. As the
fruit is thus released, it is received' upon the
ratus constructed in accordance with the present
25 invention.' conveyer belts I9 which extend- beneath the
Figure 2 is a sectional elevation taken along gradeways, and are trained around pulleys 2li se
the line 2-2 of Figure 1.
cured to transverse shafts 2l and 22. The con- I
Figure 3 is a plan view of a modiñed form of _ veyer belts I9 are driven in the same direction,
Figure 4 is a sectional elevation taken along
the line ¿3_4 of Figure 3.
Referring to Figures 1 and 2, the machine illus
and preferably at the same speed, as the aprons
8, by means of a chain 23 trained around-sprech
ets secured to the shafts I5 and 22, and distribu
tion of the fruit to the packing bins 255 is ef
trated embodies a suitable frame-work includ
fected by means of shunts` 25 extending diagonal
ing the several supporting standards I, to which ` ly across the conveyer belts. For purposes of
35 are secured the longitudinally extending side rails
2 carrying a table 3 therebetween. Shelves 4,
mounted on the side rails 2, form supports for
convenience, only two packing bins are illustrated
as associated with each gradeway, but it will be
understood that additional bins may be, and gen
two serie-s of adjustable bars 5, 5', arranged in
erally would be provided in practice.
end to end articulated relation to form sectional
40 grading rails. A central stationary grading rail
5, mounted on a standard l, carried by the table
An important feature of the present invention
resides in the mounting and arrangement of the'
articulated bars 5, 5', whereby to establish and
3, extends intermediate the sectional grading
rails formed by the bars 5, 5', and is of generally
Zones along the gradeways intermediate the
triangular cross section as shown to form in
45 clined faces cooperating with corresponding op
posed inclined faces on the bars 5, 5', to form
twin trough-like gradeways extending longitudi
nally of the machine.
The machine illustrated is designed to receive
50 the fruit to be lgraded at its left hand end as
viewed in Figure 1, and as the fruit is deposited
in the gradeways it is carried therealong by
means of a plurality of endless flexible aprons
8, the upper runs of which overlie and ride along
55 the opposing inclined faces of the central grading
maintain a series of non-grading sections or
grading sections or zones, whereby to conñne the
grading action to certain predetermined zones 45
separated by non-grading zones. This may be
accomplished by mounting the alternate bars
5', in parallel relation to the central. grading I
rail 6, and providing associated adjusted mecha
nism operable to maintain said parallel relation 50
in all adjusted positions.
In the illustrated embodiment, the bars 5’ are
mounted in parallel relation to the central grad
ing rail 6, and adjustment is effected by means
of screw shafts 26, two of which are associated 55
with each of the bars 5', one at each end there
of. The screw shafts 25 are rotatably journalled
in bearings 21 carried on the shelves 4, and ex
tended through threaded collars 28 secured to the
bars 5', the latter being drilled to accommodate
the inner ends of the shafts.
Each pair of
shafts is interconnected for simultaneous oper
ation by means of a chaink 29 passing around
sprocketslâ‘sß secured to the shafts, and one shaft
10 of each pair is provided With‘ a hand wheel 3|.
for example, which require lextremely gentle
handling to avoid injury thereto. The modified
construction referred to is substantially the same
as before except that the sized fruit is received
by a series of short conveyer belts 32 extending
beneath the grading sections of the gradeways,
and is discharged by means of lateral conveyer
belts 33 extending transversely of the machine
beneath the non-grading sections of the grade
ways. The conveyer belts 32 are supported by 10
. pulleys 34 secured to shafts 35, one of each pair
It will be apparent that the hand wheels 3| constitute unitary controls for adjusting their asso- ' of which may be extended to one side of the ma
ciated bars 5’ toward and away from the center - chine and provided with a gear 36 meshing with
grading rail 6, whereby the angularity of the
a corresponding gear 31 secured to a longitudinal
The lateral conveyer belts 33 are
15 grading bars 5 may be adjusted to regulate the ' drive shaft 38.
supportedby pulleys 39 secured to idler shafts 4|]
and drive shaft 38. The several belts 32 and 33
sizing as desired, while at the‘same time the
bars 5’ are maintained in parallel relation with
the central grading rail at all times.
' may be driven by a chain 4I trained around
Due to the parallel relation of the bars 5’ with
sprockets secured to shaft I5 and one of the
20 respect to the centr-al grading rail, those portions r
shafts`35. ’
of the gradeways formed thereby obviously per
It will be apparent that the modified construc
form no grading functions so that the release of
tion permits higher rapid operation Without
fruit from the gradeways is conñned to those
portions thereof formed by the angularly ar
25 ranged bars 5, and it will be observed that the
arrangement is such that the non-grading sec
tions of the gradeway are located above the
shunts 25.
Such construction and arrangement effectively
30 overcomes a serious
difficulty heretofore en
countered in the operation of divergent type fruit
grader wherein the gradeways are continuously
divergent throughout their entire length. It will
be understood that in operation the fruit is car
ried along the gradeways at considerable speeds,
so that if it happens to be released at such a
point as to cause it to strike any of the shunts it
may do so with such force as to result in serious
injury to the fruit, thereby rendering it unñt for
40 sale. It has accordingly heretofore been neces
sary in the operation of such machines either to
run the risk of injuring a considerable portion
of the fruit or to limit the speed of the machine
so as to prevent fruit from being-thrown against
45 the shunts with sufficient force to injure it. Ob
" vìously, these difficulties are avoided by the use of
my invention since the machine may be run at
whatever speed desired with no danger of the
fruit _falling from the gradeways on to the shunts,
due to the latter being arranged under the non
grading sections of the gradeways.
The modified construction illustrated in Fig
ures 3 and 4 is especially adapted for high speed
operation with delicate fruits, such as ripe pears
danger of injury even to very delicate fruit since
due to the elimination of the shunts the fruit
does not contact with any stationary structure 25
in being discharged from the machine,` and at the
same time the arrangement of the lateral dis
charge belts 32 beneath the non-grading sections
of the gradeways prevents any mixing of the sizes
discharged rfrom adjacent grading sections of 30
the gradeways.
Having now described my invention and in
what manner the same may be used, and what I
claim to be new and desire to protect by Letters
Patent is:
In a grading machine, a pair of longitudinally
extending grading elements arranged in spaced
apart relation to form a sizing gradeway, one of
said grading elements comprising a series of sec
tionsarranged in alternate parallel and angular 40
relation with the other grading element to form a
series of grading sections separated by a plurality
of intervening non-grading sections, a plurality of
adjusting means associated with each of said
parallel sections, a unitary control associated 45.
with each set of said adjusting means for simul
taneously operating the same to move their asso
ciated section toward and away'from the other
grading element, and in conñned parallel rela
tion thereto, and means arranged beneath said
non-grading sections for separating the fruit dis
charged from the respective grading sections into
segregated groups.
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