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Патент USA US2511715

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June 13, 1950'.
‘_
G. H. KELLER
‘2,511,714
AUTOMATIC BAG FEEDER TO CONVEYERS
Filed May 26, 1948
4 Sheéts-Sheet_ 1
" H HI
IIIHI
l l lW'"
INVENTOR.
‘GREGORY H. KELLER
June 13, 1950
_
' '
G. H. KELLER
2,511,714
AUTOMATIC BAG FEEDER TO CONVEYERS
Filed May 26, 1948
v
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_
4 Sheets-Sheet 2
’
INVENTOR.
’
GREGORY H.. KELLER
BY
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2
Q
.\
.
' ATTzS
June v13, 1950
G, H. KELLEgQ
M
’ 2,511,714
C BAG FEEDER T0 VCONVEYERS
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‘
l
k
~
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..
INVENTOR.
GREGORY H. KELLER
BY
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Y
.
.
June 13, 1950
'
‘G. H. KELLER
'
2,511,714
AUTOMATIC'BAG FEEDER TO CONVEYERS
Filed May 26, 1948
4 Sheets-Sheet 4
>
1NVEN_T_0R.>
GREGORY H._ KELLER
2,511,714
Patented June 13, 1950
UNITED. STATES PATENT OFFICE
Gregory H. Keller, Helena, Ark.
, Application
9 Claims.
May 2c, (01.
1948,198—26)
SerialNo. 29,251
1
Fig. ‘2"is an enlarged sectional view taken'at
This invention relates to continuous belt con
line 2——2 of Fig. 1;
veyors, and has for one of its immediate objects
the provision of a conveyor which is particularly
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‘
illustrating the operation of a trap which serves
well suited for use, as an adjunct to a bag sealing
to release the ?lled bags from“ one of the hoppers
machine, although not restricted in its utility to
any speci?c application.
‘
Fig. ,3 is a reproduction of a portion'of Fig. 2,- '
in properly timed relation to the movement of
-
the conveyor belt;
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3
Tall bags which have been filled and are to
Fig. 4 is an enlarged‘fragmentaryv side eleva
be transported by a belt conveyor to a bag seal
tional view, showing one of the receiving-stations
ing machine must be held in upright posture on
the belt; and in order to ‘prevent the bags tip 10 and the mechanism thereat which functions to
operate the trap at proper times, s'o'that-the
ping over enroute itis necessaryv to provide sup
?lled bags ‘fall from the hopper, one at a'time,
porting means on the belt, such as individual
into pockets provided for their reception on the
pockets into which the ?lled bags can be placed.
conveyor belt;
In a sense, it would be feasible for the opera
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Fig._ 5 is an isometric view of a rocker member
tors who ?ll the bags or attend the bag-?lling 15 forming
a part of the mechanism which func
machines to place them manually in conveyor
tions to release the bags at the proper instants;
pockets; but it has been found to be a serious
Fig. 6 is a fragmentary plan'view,'-partly'in
impedimentqtola bag ?ller’s» output capacity‘to
require him to divert'his attention from the bag
?lling'operations inj‘orderf properly to plaqe'the‘
section, taken at line 6—'-5 of Fig. 4;
20
_
vFig. '7 is'a view identical with Fig. 6 except
that it portrays an alternative condition of the
this
bags, isafterv
especially
?llingkon,
true the
where
conveyor
sever'al?operators
‘belt. '
mechanism therein shown; and
are placing bags onlthehconvcyor‘ belt at differ:
Fig. 8 is an isometric view of one of the several
blocks which are attachedto the conveyor belt
‘
j
ent points.‘ therealon'g,‘ because ' in‘ those‘ cases 25 and arranged thereon to form pockets for recep
each operator,._except,the one ,farthest fromv the
tion of ?lléd'bags'the blocks serving to hold the
sealing machine, would have to exercise caution
bags in upright posture.
'
to avoid placing bags in, pockets already occug
' In addition to suitable supporting framework,
pied, or attempting to. do so._.
, _
j
which does not nod to be described in detail,
With a view to simplifying ‘ to the, greatest
the conveyor includes a continuous belt [0, a
possible extent they-operation of placing ?lled
driving pulley l2, a guide pulley [4, a tensioning
pulley l6, and a number of idler rollers [8, which
latter serve merely to support‘ the lower run‘ of
the belt and prevent excessive sagging thereof.
bags. in empty ‘ conveyor pockets and thereby ’jin-'
creasingeach operator’s' output, the present in;
vention contemplatesthe provision ofhfeed hop-j
pers or chutes, one for-each operator, into, which i
the , operators place the bags, as they. are] ?lled j
35
and it’ further. contemplates thehprovision oi
mechanism'which operates automatically to ire- ‘
lease thebags from, thel‘hopners so that they
fall only-into empty p‘ocke‘tsf‘on thefconveyor.v
Additional objectsd'and novel features 'oflthe‘
have been put on the conveyor at various sta
tions therealong, which‘ stations are ‘identified
40
subject ,invention ' will be ] apparent, as the en}
suing detailed'description 'progressesl’
, 1.
,
a,
» 'Referringrto the. drawings _wh'ch accompany
this speci?cation‘;
,1
h
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,
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Figure l is an elevational view Ora beltv con
veyor in accordance [with the invention,‘_ the'view
being brokenintotwo parts the lower ‘ofv which
is afoohtinuatiohofthe right .endl‘of the'upper
part, four receivingstations whereat ?lled bags
are placed upon. the jconveyor being: ‘illustrated;
There are shown, resting on the upperlrun of
the belt H1, in Fig. 1,9, number of bags 20 in up‘
right posture. Thesebags'may be assumed to
45
by reference numerals 22, 23, 24 and 25, respec
tively, situated vat oneside only of the conveyor
belt. There maybe any feasiblernumber of such
stations, on each side of the belt, depending
largely upon the length of the conveyor and the
capacity of the bag sealing machine served
thereby—it being here assumed, for vpurposes of
description, that the conveyor ‘is employed in con
junction with a bag sealing machine. " '; -' '
The belt “I0 is driven in the direction indicated
50 byarrows in Fig. 1, and has its delivery end- posi
2,511,714
3
tioned adjacent a sealing machine, shown frag
an empty pocket is about to come into position
to receive a bag, and automatically releases the
bag from the hopper at the proper time, so that
mentarily and identi?ed by the reference nu
meral 26. The present invention is not con
cerned with the sealing machine, per se, and,
it falls accurately into the empty pocket.
for that reason, there is no occasion to do more
All the several stations are identical, save for
than to indicate its position, as has been done
in Fig. 1, except to mention that as the bags are
being right and left hand, when they are disposed
taken from the belt by the sealing machine they
necessary to describe only one of them.
on both sides of the conveyor, and it will be
Station ‘
travel in a horizontal path, as clearly indicated.
22 is the one selected for description because the
Because the bags which the subject conveyor 10 sectional views of Figs. 2 and 3 are taken im
is designed to handle are too tall and thin to
mediately adjacent that station, as indicated by
stand erect by Virtue of their own stability, lateral
the position of line 2-2 on Fig. 1.
supporting; means. must'. be providedtherefon. To.
Referring more'especiallyrto‘Eigs. 2-75,; inclusive,
that end‘ there“ are attached to the belt W a»
a-. sheet- metal.2 funnel-like.- hopper to having a
large number of blocks 28, conveniently of wood, 15 vertical chute 46a is suspended by means of a.
one of which is shown isometrically in Fig. ,8, to-‘
suitable supporting structure so that a, discharge
gether with the metal ?ttingafor attaching the.
opening. atits. lower, extremity overlies the row of
same to the belt. Each block 28 is of rectangular
pockets 38; and‘ it‘ is so positioned, lengethwise of
form, having a sloping edge 28' anchis secured
the. conveyor belt, that a pocket will be in posi
at the bottom to a metal strip 29 whichextends 20v tion to receive each bag upon being released from
transversely of the belt and is provided“ with
the hopper: The operator drops the ?lled bags,
countersunk bolt holes 30 to receive bolts. by
ones at.‘ a time, into the open upper end of the
means of which attachment to the belt is e?'ected.
hopper, which, as will be seen, is ?ared at the
AJmetahplate: 32 is; securedivto. one side. of. the
top, on7 three sides, so as to. facilitate insertion
block 28, along the lower edge thereef,.,by means.
or woodscrews 3.3.- and‘ 34,. and, the. said. plate.»3'2'
may! beywelded, to: the crossestrip 29=
oi the; bags. The. passageway‘ through the chute
portion.llitdissoclimensioned as to“ afford‘ a; fairly
close sliding ?t for the ?lled bags; thus ensuring
that. each bag will‘ be
upright‘ posture when
.
zig-zaggfashionrn
The several blocks
as clearly
28-. are.depictedin
located: on.Figs.
the belt
6 and‘.
discharged’ from the chute.
_
7, being so spaced as to form two parallelseries. of 30
Ainetalplate. 4.5, normally positioned below the
pockets extending. lengthwise. of the belt. The
pockets; of. one seriesare identi?ed by the. refer-7
ence: numerals 36- while. those of. the. other. series
areiidenti?ed by the reference. numerals 38.‘. The
blocks ‘form,- conjointly, three; sides. of each 35
hopper discharge opening, as shown in Figs. 2
and. 4,. functions as a; trap‘ to retain each bag
within the lower end‘ of the chute‘ 44a until an
empty conveyor pocket 38 is in position to receive
pocket, while. the tourth. sideis formed by a. sta
tionary guide rail 4!], 42, placed at either side of
shown in. Fig. 2,‘ but: is: movable, as indicated by
thetwaseries, or blocks. These. guide rails. may
be‘ strips. of wood, secured to the. framework of
the- conveyor and. they overliethe. two edge por
tions; or» the upper. run. of thebelt. The pockets
are proportioned- in conformity with the size of
theTbags tobe handled,
largeenough tore
eei-ve: the» bags. freely. and small. enough to ensure
alternate open. position, as shown in Fig. 3, to re
lease. a. bag 20' resting thereon. Upon‘ being re
leased;
Fig. 3". the bag. drops. by" gravity, as‘ depicted;
'
transfers them- one. at a. time’ to the. conveyor
, contact spring 50 is secured at its upper end to
the-arm 48 so as. to be movable therewith and, has
the. same. The plate‘ {5 normall'y'is positioned’ as:
thedouble-headed arrow on that ?gure to an
Mounted on the hopper and pivoted‘ at 46' is
an: arm 48' which projects" through an opening in
the.» front. of the hopperv and normally- is posi
that the bags willrbeheldiuprightm
v
' tioned,.as per Fig. 2,, sothat" its lower end'portion
The. tour stations 2Z—2,5_.-,..inc1usive, as well. as
will. intercept each bag as' it descends through
suchadditional stations as. may be placed‘ at the
the. chute. Arm 4:8 normally is held in that po
opposite sideoi. the. conveyor, usually are, situated » sition. ‘by a. leafv spring. .49‘ which is‘ resilient
adjacent bag ?lling machinesv from which an op
enough to. allow the arm 4.8‘to' swing out of the
erator takes the bags, as. they are ?lled; and w way under, the weight of a‘single ?lled‘ bag. A
belts
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> It is important. that the‘operator be. able to de
a contact 5|. at its, lower end‘ which, is adapted
to. engage. a ?xed- contactv 52 when, the arm 48
CI CI! is. deflected under the weight of a; bag. as per
I‘ seeing, to it that. the?lled. bags are each placed
Fig. 3-. The aforementioned contacts are‘ nor;
man. empty pocket. onl‘the conveyorr 'll'hev task
mally open,. and; the purpose. thereof is to con
vote. his entire attention to the bag~?lhngz op.
eration, without having. to. divert. attention. to
of so -.doing,, without. mechanical. assistance, would
he- additionally-complicated and. hampered; where
several.- operators. are using; the same. conveyor,
1 because. all. the operators, exceptv one,v would; be
obliged to make sure, iniealch instance,,. that a
60
selectedpocket is an.- emlptyLQneQ. Hvenwhen only .
one operator is, usingthezconveyorrthere. wouldbe
a. material; loss of. time involved in placing the
bags, in. the pockets, manually; .and'where several
operators. are. involved, simultaneously, the loss
at time. would. be- greatly increased; due. to the
necessity of distinguishing. empty pockets. from
those-already?llect.
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By virtue of- the. electro-mechanical'. provisions
about to be» described,. each. operator has only
to-take-each bag, as itis'?lled, and place ina
hopper, paying no attention to the conveyor; and‘
the mechanism automatically determines when 75
dition the energizing circuit‘of a plunger solenoid",
to bedescrfibed‘latenwhich ‘controls operation of
the trap. Were it not for’ said‘ contacts the trap
would open each time. an empty pocket 38 passed
the. station 22,. irrespective of the presence or ab
sence of’ a. ?lled hag inthe hopper; and that, of
course, would be objectionable because of. the
useless wear. anditear and‘ current consumption
involved.v
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.
The trap 45‘v is riveted at one end‘. to an upright
arm 54 whichis fulcrumedona pin 56'.carried .by
a. bracket 51- secured to the frame of the ma
chine, said arm being bent, as shown, to clear the
conveyor belt. and other, parts of the. mecha
nism. A leaf spring, 58 servesto return the arm
54. anditrap 4.5‘; to their normal‘. positions (Fig. 2)
and suitable stop means are provided to limit the
movements of said arm in either direction.
‘ as; 1.114
5
.
the station 22, it is essential, to make sure that
must be accomplished automatically,
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rocker member .88. is provided with a contact 15
which is adapted to engage a ?xed contact 16
when the rocker member is1postured as per Fig.
6; but if there isa bag in the pocket 38 in regis
tration with'the “feeler” portion of the rocker
member,the latter is-thereby'prevented from ro
pockets mayalready be occupied when they reach
the trap will be opened only when an empty
pocket is at hand to receive the bag',;and that
6'
,Thearm 65, forming an integral part of the
The conveyor belt runs continuouslyw?ndz it
will be clear enough, assuming a ?lled bag in the
hopper, that if the trap is opened at precisely ‘the
right instant the bag will drop into a pocket on
the conveyorbelt. But inasmuch as some ofthe
tating clockwise su?iciently to close thecontacts
15 and 16. The latter contacts are in series with
10 the contacts 6| and Stand with the winding of
a plunger solenoid '18 the function of which is
to rotate the bar 10 from its normal full-line
The arm 54 is actuated by means of the rocker .
member 68, which is shown isometricallyinFig.
5, and in plan view in Figs. 6 and 'l.- This'mem
posture ‘of Fig. 4 to the posture thereof indi
rying an- upright pintle 63 which extends‘through
the lug 81, thereby pre-conditioning the arm 54
for rotation‘by the rocker member 60. The sole
cated. in dot-dash outline in the same ?gure, so
her is pivotally mounted on a Z-shaped bracket
vI52 secured to the frame of the machine and car 15 that its lower end portion stands in the path of
the bore of a sleevev 64 forming an integral part
of the rocker member. Welded to thesleeve 64
are two arms 65 and 66, disposed substantially
in quadrature, and_:the latter includes a bent
portion 661: which functions as a “feeler” and also
noid 18 has a plunger '19, normally retracted by a
spring 80 and provided at its forward end with
20 a ?ange or head 8| which is positioned to strike
the edge of the bar 18 near the upper end thereof
when the solenoid is energized, thereby rotating
as a cam follower, as presently will be made
clear. Extending from the free end of the bent
said bar so that its lower end portions is moved
portion 66a of the arm 66, and integral there
with, is a lug 61.
,
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25
into ‘the path of the lug 61.
.
Now it will‘ be apparent that if there is a bag in
the'hoppeiiholding the contacts 5| and 52 closed,
and the pocket 38 engaged by the rocker mem
ber'GO is empty so as to bring about a closure of
thecontacts 15 and '16, the solenoid 18 will be
and the bent portion 66a of the arm 66 is adapted
to enter each of the pockets, under the‘ impetus 30 energized and the bar 18 will, .resultantly, be so
postured that when the rocker member is subse
of said spring, as saidlrpockets move into regis
The rocker member 60 is spring-biased-clock
wise, as viewed in Figs. 6 and '1, by means of a
coil spring 68 which bears against the arm 65;
qently'rotated counter-clockwise by the succeed
ing block 28, as depicted in Fig. 7, the lug 61 will
tration therewith. But if a pocket is occupied
by a ?lled bag, the arm portion 66a. will be pre
ventedfrom entering. As thevbelt moves for
ward, the blocks." successively strike the in
contact the bar 10 and thus rotate the arm 54
35 and move the trap 45, carried by said arm, to the
open position (Fig. 3). Thereupon, the bag will
drop from the chute 44a into the empty pocket.
clined surface 66b and, in the manner of cams
acting upon cam followers, are effective toro-l
tate the rocker member. counter-clockwise, as
If, on the other hand, the pocket 38 is occupied,
the contacts 15, 16 will not close and the solenoid
clearly illustrated in Fig. '1. This movement of
will not be energized. Likewise, if there is no bag
the rocker member is effective to move the arm 54 .40 in
the hopper, the contacts 5|, 52 will be open
out of its normal position (Fig. 2). to the “open
and,
again, the solenoid will not be energized.
trap.” position of Fig. 3, provided a certain con
Therefore, under either or. both of the latter con
dition precedent obtains, dependent upon the
ditions the arm 54 will not be actuated.
pocket 38 (which has just previously passed the
rocker member) being unoccupied, .If the pocket 45 Following eachopening of the trap, it is nec
essary to restore the bar 10 to its normalposture
in question is already occupied, it obviously would
which is that indicated in full lines in Fig. 4; but
not be‘ permissible to open the trap and dislodge
it also is necessary to keep the trap open long
another bag onto the ‘existing occupant. ; Hence,
enough to ensure that'the bag is completely clear
thereof before the arm 54 is allowed to‘return to
some provision is needed which will preclude the
rocker member 68 being effective upon the” arm
54 in event of the pocket being occupied. The
its normal posture, as per Fig. 2. ' And those con
ditions have given rise to a problem the solution
provision here madeto that end includes a ver
of whichihas demanded the exerciseof very con
tical bar 10 which is pivotally connected at 1|
siderable ingenuity, as will now be pointed out and
to the arm 54 and carried thereby. From inspec
tion of Figs. 4, 6 and '7 it will be seen that the ,
explained.
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A cam plate or‘WedggBZ has an'oblique sur
bar 18is laterally ,offset from the arm 54, and it
normally is sopostured that the lower end por
tion thereof (see vFig. 4) is disposed. out of the
face 82a which is positioned to intercept and en
gage the protruding edge of the bar 10, and is
thereby effective to rotate said bar back to its
path-of the adjacent end of the 1ug61.‘ The up
per end of the bar 18 is frictionally engaged by a 4 60 normal posture as the arm 54 continues to move
leaf spring 12 attached to'the arm 54‘and-e?'ective
yieldably to retain the bar 10 in. anyv posture of
rotation until it is forcibly'rotated totanother
toward fully open position.‘ But such rotation of
the‘ bar 16 displaces it from the path of the lug
‘ 7-61 and would result in the ‘bar 54 being released
too soon, thereby closing the trap prematurely.
posture. In orderv that the arm; 54 maybeac
~ -In order to avoid that circumstance, there is
tuated to open the trap, it. is necessary that the I
bar 16 be so postured that its lower_;end1;~por,
tion- is in the path of the lug 61. Wereyit other
wise, a counter-clockwise rotationiof the rocker
member 68 would be a nullity. The ‘Hpperygénd
portion ‘of the bar 10 is slotteduarcuatelyto .re-i
ceive-a pin 13 which is af?xedto1the1arm154iand
serves to limit the rotation of the bar 18.,in-both
directions ‘ while permitting sumcient- rotation
thereof to enable its lower end to be movedi’into
and out-of the path ofthe lug 61;: ,. I»; . g
.z;;il
10
provided a latch bar 84 pivoted at 85 and having
a detent 86 which is adapted, by virtue of a. bias
ing spring 81, to latchingly engage the arm 54 be
fore the bar ‘10 has been rotated suf?ciently to
clear the lug 61. Thus, the arm 54 is latched in
open posture beyond the time when it otherwise
would be released by virtue of the rotation of the
bar 18 out of the path of the lug 61. However, it
is- necessary to release the arm 54 as soon as pos
75 sible after the bag- has been fully discharged from
8%
the enute'se ythait'thef trap‘wi'llibe {in casinos to
intercept the next" “a-g ‘ to be ' "dropped "mm the
' 'i‘ ' :Iy.
I'claim-f"
'Inl» combination;
' ‘ '1- a" continuous
'1
belt-‘conveyor
.7
hogper;
having means‘ de?ning" a‘ ‘series of‘ pockets‘ are:
tribut'ed lengthwise? of the '‘ belt and movable.
therewith,’ dispensing means lecated‘ adjacent;
’
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‘ 'Retraction- or ' theilatc'l‘r bardfandléonsequent
release‘or'” the» arm 54-" ise?ected by'meansvoi a
the E8 which i’s'piv'etally connected v'a/li- 891%‘; the
latch‘ bar‘ 8*4-1- and'threaded ,to- reeeive'a mean;
The link 98 passes‘ through-Yarn opening‘ in-the
arm’ 5'5‘ of the réelrer member‘ 8d and-‘ithefi'nutw ‘is
so positioned thereon thatjwheirthe rockermerm 110
ber; has assumed the ‘ posture in which: it issrshowlm
in' Fig?'], the‘ar’m ET isba're'ly in contactiwiththae
rrut 981i ' manifestly, a further counter-clockwise
rotation of‘t'h'ereeher member ?niwill-resmlrt inzth‘e
linil: 881- being pullll'ed to! the‘
by we
65;
aindthatiin turn,» will! causethel'atch bar ?zttoebe
the conveyor and'joperative in response to each
actuation to- release a single unit-to-be-conveyed
for'deliveryinto one of'said pockets», mechanism
controlled bysai'd'conveyor and'responsive tort'he
presence or absence 6f one otsaidun-its-ih each
one‘oi" said pockets passing a given point-toactu
ate said dispensing means- each time an empty
p‘ocketis positi‘orl'e'd“ to: receive a uni-t'iirom! the
dispensing’ means, the '?rslt'mentioned means
comprising series’- offb-ioeks attached to the
belt‘ and"v spaced apa1t lengthwise-thereof; and
retracted‘ su?icientlyto release the‘; arm: 542;: The
the‘ conveyorécontro‘lled mechanism comprising
further rotation of said rocker - member needed
a'ro‘cher member‘ which‘ is biasedi‘tobea'r ‘against
teretract the: latchv ‘bar isfe?ected’by vat ladierall
the; sides cf sai'd- blocks and adapted teen-tier the
projection; on, the side of’ the block Mirandzisso 20 passing pockets‘ between said-‘block's, and means
positioned‘ that it will engage theamm Elli. at the
actuab'l‘e bysa'id rocker member'to‘pre-conditi‘on
rocker member ?liiandl eausethe-laiiter tabern
said dispensing means'for actuaticm said rocker
tated ccimtereclockwise» through.v :ai.‘ smalbaddi
tional an-gle—just enough so that the-arml??zwill
member being‘ elf-“entire to“ actuate said". ere-enn
move‘ the link 88 to'the right (Figs. 6 and 7) suf?
piednone of said pockets, said rocker member be
ci‘ently to disengage thev detent 86 from the edge
of the bar 54. The lateral’ projection, of which
there
one on each block 28, may conveniently
be the head of‘ avv round head screw 34 which, as
shown in‘ Fig. 8-, is one of the two screws .by which
the-block 28»v is securedto the plate 32. The other
screw, identi?ed by the numera1 33 (Fig. 8) may
have a ?at head and be countresunk into‘ the
plate so that it does not- project beyond its sur
face.
1
It will be self-evident that the arm 131 and the
contacts El and 52 could be omitted so that the
energizing circuit of the solenoid 'I8would include
only the contacts 75 and T6 and a source of cur
rent, and that the only consequence of so doing
would be to cause the trap 45 to open regardless
of the presence or absence of a bag in the hop
per. The only objection to such an omission is
diticning ‘means-onlyupen entering an unoccu
me 'eifective upon“ emerging from- an‘ empty
pocket to‘ actuate sai‘drdi‘spens'ing means'lfollbwi’ng
a: pre~¥conditioning thereof’ as 'hefbre‘speci-‘?ed;
2;
- combination; a continuous‘ belt‘ conveyor
having‘ means-1
a series of’ pockets dis
tributed’ lengthwise of’the-belit and‘qmovable
therewith; dispensing means located adjacent
the conveyorv and operative in- response to each
actuation to release‘ asin‘glé» unit-to-rrbeeconveye'd
36 for delivery'i'nto one of‘ said pockets, mechanism
controllediby said’‘conveyorv and responsive to the
presence- or absence of one of sa-i'di units in each
one or said pocketspassing a- given point: to- actin
atesai‘d dispensing means each time an empty
‘ pocket is‘ positionedto- receive a unit from the
dispensing means;fthe first" mentioned means
QOrriprisi-ngja series of “blocks attached‘ to- thebelt
and spaced apart. lengthwise- thereof; the con
that the arm 54%, together with the trap, would
veyorécontrolled mechanism com-prising a rocker
be" oscillated unnecessarily and without useful
member
which'i’s'v biased’ to
against the sides
purpose. However‘ such ‘unnecessary movements
oifsa-idtv blocks and adapted to‘ ‘enter the-passing
of the aforementioned components is of no major
pockets between said’ blocks, - the dispensing
signi?cance, and I do not intend that my inven
means incl-‘riding a fulcrumed arm which is e?e'ce'
tion shall be regarded as limited by the fact that
ti-ve upon- being moved from its normal’ posture
my disclosure includes provisions for preventing '50 to- an alternate‘ posture to‘ release a unit-tohbei
such unnecessary movements.
conveyed, said arm being actua-ble-by sai‘di rocker
It is‘, of course, essential that only one bag be
member ‘when the latterj in‘ turn, is rotated‘ by
placed in the hopper at one time; but the opera
one of said blocks; means actua-ble- by said rocker
tion of the conveyor and feed mechanism ordi
narily is‘so fast that the bags can be passed to the '
hopper as rapidly as they are ?lled.
>
Although ‘my improved conveyor and feed
mechanism was conceived primarily as the solu-'
member to- precondition-"said dispensing means
‘for actuatibn; said‘rocker member being e?ectiive
to- actuatefsaitl preconditioning‘ means-1 only upon
entering arr unoccupied" one-of’ said pockets; said
rocker membenbeing ‘effective upon vemerging
tion of- a problem which obtained in the feeding
from an empty pocket to‘ actuate said dispens
of‘ ?lled bags to a sealing. machine, its potential 60
mea-ns following a/ preicondiiti’oning thereof
usefulness" clearly is not limited to that applica
as before-"speci?ed? and» anl'element' carried‘ by
tion, nor- even, to the conveying of‘ bags‘. The
said; arm- and’ engageable by; said?v rocker member
term- “belt,” as used in this speci?cation and‘ the
only when i-‘nj a‘ ‘given’ position;_ and a, solenoid
‘ appended claims, is to be construed broadly and .
forming apart‘ of said pre~condlitiorring means
includes link-belts or chains as well as leather
and fabric belts, such as I have chosen. to illus
and operable; when energihedi; to move said el'ee
'ment into ‘said given? position.
Y It is'oibvi'ous that various changes may be made
in the speci?c embodiment set forth for purposes
having aw series: of‘ blocks- m-ou'ntedi on the: belt
and movable; therewith and spaced’ apart-length
of, illustration Without departing from the prin
‘ ciples’ of the invention.
Accordingly, the inven
tion is not to be limited to the precise-details
disclosed‘ herein, but includes all‘ modi?cations
thereof within the spirit and scope‘ of the ap
pe‘ndedcl‘aiins.
'
‘
I
'
I
"
Irricombinat'i'om a continuous hel-ti'conveycr
_-wisefof theibelitito-form a series5 of spaced pockets
each‘ of“ whiclfi-v is; adapted; to receive an article» for
conveyance; dispensing meansi associated with
said? conveyor‘ and operative upon: being?’ actuated
to> dteprcsitv an article in- an: empty one of said
pockets, said dispensing? means‘inc‘luding‘ a: ?rst
member which is movable from a normal posture
tov arii alternate posture to!v el?ect release of?an
article, and whichis" then returna‘me tolits ‘nor
sate sucp'
dirislually
‘
a
.,
.
t
-
mal posture, a rocker memberoperative ‘upon be
ing rotatedin"a"certain'direction to move said
?rst member from its 'normalj__' posture‘ to 'its
operable bnsais1.<man.her,iiré?lehten s 11111:
occupied poclget, “to, condition "said; mechanism
whereby tovre de. ,thesgsarnepiqperableftofinove
saidgtra 051m alternatefposition, andfajdevice,
-¢°PtF.Q11e.d‘ by ;FQ§§GOH¥9¥°E~¢°¥1 ‘aciliaiins Said
mechanism whe'n'the same has been'conditiqned
condition said '?rst‘inember so‘th'at it is’enga'ge
able by said rocker member, said rocker member
forsqrerationt
alternate fv'po'sture, providedf'said'i ?rst ‘.me‘n'iber
has ', ‘en conditioned‘ forfi venga'g'ement by :said
rocker member, conditioning'me'ans operative to
having a part which contacts said blocks as they
-
6. The combination “accordance with claim
5 wherein saidmechanism-aincludes a fulcrumed
arm‘xylhichwcarries saidwtrap atuitsl distalend,
pass thereby and which is adapted to enter, suc
wherein said‘ member‘ is’rot'atable‘ ‘and has ?rst
cessively, all passing pockets which are unoccu
pied, means biasing said rocker member so that 15 arm which bears against the“block‘s and enters
it rotates oppositely to said certain direction
each time said part registers with an unoccupied
one of said pockets, thereby causing said part
to enter the empty pockets, said blocks being
the unoccupied pockets and is spring-biased to
ward said blocks and has a second arm which
carries a contact, and wherein said means com
prises an electromagnetic device and an energiz
effective, in passing, to rotate said rocker mem 20 ing circuit therefor including said contact and
a second contact, said contacts being normally
ber in said certain direction, said conditioning
separated but adapted to be engaged in response
means being actuable by said rocker member to
to rotation of said member resulting from said
condition said ?rst member in response to each
?rst arm entering an unoccupied pocket, said
rotation of said rocker member which is occa
sioned by said part entering an empty pocket, 25 electromagnetic device being effective, when
energized, to condition said mechanism for
the arrangement being such that when said part
operation
by said member.
>
registers with an occupied pocket it is blocked
7. The combination in accordance with claim
from entrythereinto by the article in the pocket,
5 wherein said mechanism includes a rulcrumed
said rocker member being consequently prevented
30 arm which carries said trap at its distal end,
from actuating said conditioning means.
wherein said member is rotatable and has a
4. The combination in accordance with claim 3
?rst arm which bears against the blocks and
wherein said ?rst member vis a fulcrumedarm,
enters the unoccupied pockets and is spring
and which combination includes a bar pivotally
biased
toward said blocks and has a second arm
mounted on and carried by said arm, said bar
which carries a contact, and wherein said means
being rotatable between two alternate postures,
comprises an electromagnetic device and an
in only one of which it is engageable by said
energizing
circuit therefor including said con
rocker member, an electromagnetic means oper
tact and a second contact, said contacts being nor~
ative, upon energization, to move said bar to the
mally separated but adapted to be engaged in re
posture in which it is engageable by said rocker
sponse
to rotation of said member resulting from
member, and an energizing circuit for said elec
said ?rst arm entering an unoccupied pocket,
tromagnetic means, including a switch which is
said electromagnetic device being effective, when
adapted tolbe closed by said rocker member when ,
energized, to condition said mechanism for
said part enters an unoccupied pocket, and means
operative to move said bar to its alternate posture ,
following de-energization of said electromag
netic means and in response to movement of
said arm to its alternate posture, said electro
magnetic means and said circuit, including said
switch, constituting said conditioning means.
5. In combination, a continuous belt conveyor
having a series of blocks mounted on the belt
and movable therewith and spaced apart length
wise of the belt to form a series of spaced pockets
each of which is adapted to receive and support
operation by said member, characterized by the
inclusion of a bar pivotally mounted ‘on said
arm and having two limiting positions in one
of which it is engageable by said rotatable mem
ber whereby to enable said rotatable member
to actuate said arm and thereby move said trap
to itsv alternate position, said electromagnetic
device being operative, when energized, to move
said bar into position to be engaged by said
rotatable member.
‘
8. The combination in accordance with claim
in upright posture a ?lled bag, bag dispensing 55 5 wherein the dispensing device comprises, a
normally open switch included in circuit with
means disposed above said conveyor and includ
said electromagnetic device, said switch being
ing a trap having a normal position and an
adapted to close in response to the presence of
alternate position, said trap being effective in its
a ?lled bag in the dispensing device, the func~
normal position to prevent discharge of a bag
tion of said switch being to prevent said trap
from the dispensing means, but not effective so
being moved to its alternate position when there to do when in its alternate position, and mecha
is no ?lled bag in the dispensing device and ready
nism operative to move said trap to its alternate
to be discharged onto the conveyor.
position to release a bag from the dispensing
9. In combination, a continuous belt conveyor
means, said mechanism being operative under
having
a series of blocks mounted on the Ibelt
65
control of the conveyor to release bags from said
and movable therewith and spaced apart length
dispensing means in such timed relation to the
wise of the belt to form a series of spaced pockets
travel of the conveyor belt that the released
each of which is adapted to receive and sup
bags are deposited in said pockets, individually,
said mechanism being further controlled by‘the
port in upright posture a ?lled bag, a bag-dis
are empty pockets in position to receive them,
said mechanism including a member positioned
adjacent the conveyor and which is biased to
porting said trap and movable to open said trap,
said arm being movable about its fulcrum,
presence of bags in the conveyor pockets so as 70 pensing chute disposed above said conveyor and
having a discharge opening, a trap normally
to prevent the release of bags from the dispens
closing said opening, a fulcrumed arm sup
ing means except in those instances when there
periodically, in response to the movement of
2,511,714
UNITED STATES PA'I‘ENTS
‘ ~ said belt whereby to open said trap each time a.
pocket- is in peefrtion to ~receive a bag
said
chute, llatc'l?ng means pperative to retain said
am tempqraricly
‘open-“trap pcsition where
Number.
by “to prevent prematureclosingof ‘the trap, “and 5
1328,751
11,619,015
means opera-hie ‘byith'e conveyor v"fer v(ile-at?'xgza?in‘g
said latching means ‘whereby to release said ‘arm
foliowing the lapse of sufficient time ‘for-a ?lled
. bag gorma'lly to be ‘fully discharged mm ‘the
chute. ’
REFERENCES
_
GREGORY
2(EI'BED
H.
The ‘following references are 01 record in the
‘ 306,984
945,658
1,680,024
2,192,503‘
10 2,382,619
7 £941,043
Name‘
_
‘Date
Lawrence ,._‘_-.‘___._'_ Dec. ‘12; 1905
WLghit _____ _______ __ Jan. 4, 1910
Leva'lley ;;‘._._______ ._ ‘June .4, 1912
’ Bohn ___.__b__________ Mar. '1, 1927
Koerner __________ __ Aug. 7, ‘1928
Meyer‘ _,___;_'_____.. Dec. 26, 1933
Newman 1-, ____ __'_ Mar. 5; 1940
iEaJp ___‘_______V____ Aug. 1.4, ‘1945
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