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Патент USA US2403942

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July 16» 1945
> s. ~F'. MATHERs
_ 2,403,942
Filed Feb. 8, 1945
9 Sheets-Sheet 2
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Filed Feb. 8, 1945
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9 Sheets-Sheet 3
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9 sheets-sheet 4
>-s.. P. MATHERS
Filed Feb. 8, 1945
9 Sheets-Sheet 5
BY M0676),
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July 16, 1946.
s. P. MATHE'Rs
Filed Feb. 8, 1945
9 Sheets-Sheet 6
BY „Mr @W
‘l s. P. MATHERS
STACKING MACHINEFiled Feb. 8, 1945
9 Sheets-Sheet 7
.My 16,1946. '_
s.l P. MATHr-:Rs
Filed Feb. 8, 1945
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Filed Feb. 8, 1945
9 Sheets-Sheet 9
Patented July 16, 1946
UNITED STATES? vrrr-"relazi-All'orrlclï
Stephen P. Mathers, Philadelphia, Pa., assigner
Application Februaryß, 1945, Serial No. 576,887L
5 Claims; (Cl. 214-6)
My invention relates to a new and improved
stacking machine.
While the invention relates particularly to the
stacking of trays which are used in connection
with the manufacture of candies, it is` not limited
to any speciñc purpose, or tostacking any specific
The invention relates tothe type of Amachine
which Yhas two vertical endlesschains, which have
laterallyalined front ascending vertical runs, and
ably locked in said‘operative position and they
remain locked until'said supporting members are
automatically _moved'j'laterally outwardly away
from each other, to release the respective tray, at'
the rear of the machine.'
.. _.
Fig. 5 is a side elevation which shows aresp'ec.
tive 'pair of supportingmembers, assembled with
their holder or mount..
Fig. Gis an elevationof the modiiied supporting
member of the second embodiment, assembled
laterally alined rear descending vertical runs.
Some of the objects of `my invention `are to pro
videY said laterally alined runs with holders for
and supporting member of the second embodif
supporting the trays or other articles, said hold
ment as shown in Fig. 6, showing. how a holder is
ers having supporting, members which `are moved
clamped to a respective link of Ia conveyer- chain.4
laterally inwardly towards each other and lat
with its holder or mount.
Fig. 7 is a side elevation of the assembled holder
Fig. 8 is aside elevation of the supporting
erally outwardly away from each other; to move
member which is shown in Fig. 6, detached from.
said supporting members laterally inwardly to
wards each other, into operative position, below a.
its holder or mount.
, loading station which is provided at the front
ascending runs, so that said supporting members'`
nick the object oli" the loading device; to stack
the objects on `a suitable support by unloading
Fig. 9 is a front elevation of Fig. 8. .
Fig. 10 is a side elevation of the holder or
mount of the second embodiment, .detached from`
its supporting. member.
Fig. 11,.is a front elevation of Fig. 10. ’
said objects from the rear descending runs, each
Figs. 12 and 13 are resp?ectivelysectional views`
object being released from its holders by the next. 25 on the lines |2'---l2“and>` l3.-l3’of`Fig. 11.
preceding object in the stack; to release the ob
Fig. 14 is a side elevation of the coupling mem
jects fromv the holders by outwardly laterally
ber which connects a holder or mount of the first>
moving said` supporting members away from each
embodiment, pivotally to a respective link of a.
other, and to operate a control by one of saidA
conveyer chain, so that each holder can turn.
outwardly moving supporting members, .whereby
transversely, to-and~fro, relative to the respec
the pile of stacked objects is moved automatically'
tive link, about an axis which is parallel to the4
plane of Fig; 1..
laterally away from the/stacking station; and to
provide a machine of simple and eii‘icient design.
Fig. 15 is an end elevation of Fig. 14, taken
Numerous additional objects and advantages
at the right of Fig. 14. _
of my invention will be stated in the annexed de
scription and drawings,v which illustrate preferred
embodiments thereof.
Fig. 16 shows a modification of‘ Fig. 14. 'This
modification is used in the second embodiment:.
Fig, 1.7 is a side elevation of the trigger ofthe..
Fig. 1 is a front elevation of theiirst embodi
second embodiment.
ment'of the improved machine.
Fig. 18 is a detail top View, taken along the
Fig. 2'is'a side elevation of Fig. 1.
40 line lä-lß of Fig.¿4, which shows the means ’for
Fig. 3 is a section on the line 3'-3 of Fig. 1,
connecting a coupling member rigidly to the re-lr
showinga- slight modification, in which each con
spective- link. It also shows
veyer chain has front andrear vertical runs,l a
top convex run and a bottom horizontal run; said'
at the setting station, whereby the supporting
members are moved laterally inwardly towards
runs of each chain being in the same vertical 45 each other, into operativepositionvto pick upa
transverse plane. In Fig. 2,` the bottom run of
tray or other object.
each conveyer chain is inclined downwardly, from
Fig. 19 is a side elevation'of a supportingmem
front to rear.
Fig. 4 is a detail frontelevation which showsI the
setting station which is» located‘below the loading
station, at the front of the machine. At said
setting station, the supporting members are
moved laterally inwardlyV towards each other, to
be located in operativeY position, in order to pick
up‘a tray. Said supporting members' are releas
ber of the first embodiment.-
Fig 20. is a perspective view‘of one of the clamp
ing springs which are used to clamp each tray
betwcen the respective supporting rmembers.
Fig. 21 is a perspective View of 'theïmount ‘_or¿`
holder> for a pair of supporting members, in the
first> embodiment.
Fig. 22 is a detail perspective View of one of
the triggers of the nrst embodiment.
Fig. 23 is a front elevation of the supplemental
slide-bearing for the supporting member of the
first embodiment, said slide-bearing being fixed
to a respective mount or holder.
Fig. 24 is a detail view which shows a switch
S, which has a switch arm Sa which is biased to
the broken-line position, and which can be turned ,
to the full-line operative position to abut con~
tact Sb.
Fig. -l shows a frame which comprises uprights
I and a base 2.
A lateral shaft I8 is turnably mounted in bear- ,
member 25B has a leg 2SA. Each leg 25A is
clamped to the body of a respective coupling
member 25, by a nut and bolt, as shown in Fig. 18.
The shank of each bolt is located in a respective
bore 25 of said bar-like body.
Each pair of members 25B has parallel legs
23C, which are connected by a pivot member
26D, which serves as a pivot connecting member
for the next adjacent link of the conveyer chain.
An anti-friction roller R is turnably mounted
oneach pivot member 26D. , The conveyer chain
is of standard construction, so that further de
tailed description is unnecessary.
In this embodiment, each coupling member 25
is offset slightly relative to the pivot pins which
connect the respective flink, to the two next ad
Identical conveyer chains 20 and 20A have their Y jacent links. Each conveyer chain is under sufñ»
respective top convex runs meshing respectively
’cient tension, so that such slight offset is not
disadvantageous. Other standard chains are
with sprockets I9 and ISA. Each chain 23 and
known, whereby the axis of shank 2l could be
20A has a front, vertical, ascending run, and a
located on the vertical median line of the respec
rear, vertical, descending run. The vertical runs
ings which are ñxed to uprights I.
I9 and I9A are ñxed to shaft I8.
Top sprockets -
of each conveyer chain are located in the same
transverse plane. The respective transverse
planes in which said conveyor chains 20 and 20A
tive link, and I can use such standard alternative
As shown in Fig. 4, a supplemental bearing
member 341s fixed to each holder 24. As shown
operate, are parallel. Fig. 2 shows that each con
in Fig. 23, each supplemental bearing member 34
veyer chain meshes with additional sprockets 22
has holes 32d, throughr which the Shanks of re
and 23, so that each conveyer chain has a bottom
spective screws can be passed, in order to ñx each
inclined run 2l, which is inclined downwardly
supplemental bearing member 34 to its holder 24.
from front to rear. This is an optional detail,
Each supplemental bearing member 34 has re
because Fig. 3 shows that the bottom run of each 30
spective cylindrical bores 32B, which are laterally
conveyer chain is horizontal.
alined with respective cylindrical bores of the
Fig. 1 shows a pair of laterally alined mounts
bottom flange 3| of the respective holder 24.
or holders 24. Each holder 24 is turnably con
Two supporting rods or members 32 are slid
nected t0 a link of its respective conveyer chain,
so that each holder 24 can turn to-and-fro, about 35 ably associated with each holder 24. Each sup
porting rod 32 is laterally slidable to-and-fro.
a lateral axis which is parallel to the axis of
As shown in Fig. 19, each cylindrical rod 32
shaft I8. The pairs of laterally alined holders
has a rounded end 32C, an integral cylindrical
24 are provided along the conveyer chains 20 and
collar 33, and a reduced supporting end-portion
20A, at equally spaced intervals. Each holder
24 is located laterally inwardly, relative to the 40 32A, which is also cylindrical, save Where it is
cut away to provide the bottom planar face 31.
respective conveyer chain. As shown in Fig. 5,
each holder 24 is provided with a pair of support
This cutting away gives greater clearance, during
the stacking.
ing rods or members 32, upon which a respective
part of the respective tray is supported. Each
The cylindrical collars 33 of the rods 32 fit
tray T is supported upon four respective members i , slidably in said cylindrical bores of the respective
32. Each tray T is therefore always held hori
iiange 3l. As shown in Fig. 4, a compression
spring 35 is located in each said bore of flange 3|.
zontal, in the front and rear runs of the chains
and also at the top runs of said conveyer chains.
Each tray T and its two holders 24 can pass freely
One end of each compression spring 35 abuts a
respective collar 33. The other end of each com
between the sprockets I9 and ISA, above the shaft 50 pression spring 35 abuts the end-wall of the re
I8, so that each tray T is maintained in ‘a hori
spective bore of flange 3i. Each compression
zontal position, in the top runs of the chains 23
spring 35 therefore biases the respective rod 32,
and 23A, as well as in the vertical runs of said
laterally outwardly, towards an upright I.
Fig. 4 and Fig. 21 show a clamping-mount 38.
Fig. 5 shows that each holder 24 is of triangular
which is ñxed to each pair of rods 32. Each
clamping-mount 38 is located laterally inwardly
As further shown in Figs. 4 and 5, each holder
relative to its holder 24. As shown in Fig, 21,
has a top bearing-hub 28, which has a cylindrical
each clamping-mount 33 has respective hubs 39
bore which is parallel to the axis of shaft I8.
and 39A, which have cylindrical bores, in which
Figs. 14 and 15 show a coupling member 25, 60 the respective rods 32 are located. Said hubs 39
which is part of the means for fixing a holder
and 39A are fixed detachably to the respective
24 to a respective link of a conveyer chain. Each
rods 32, in any suitable manner. Each clamping
said coupling member 25 has a cylindrical shank
mount 38 may normally abut the respective
2l, which has a reduced and threaded end-por
transverse face of the respective holder 24, so
tion 29. Each cylindrical shank 21 fits in the
that each spring 35 is maintained under initial
cylindrical bore of a respective bearing-hub 28,
biasing compression. Each clamping-mount 38
so that each holder 24 can turn freely on its asso
moves laterally in unison with its respective two
rods 32.
ciated shank 21. This turnable assembly is main
tained by a nut 30, as shown in Fig. 4.
As shown in Figs. 14 and 15, each said coupling
member, 25 has a bar-like body. Said bar-like
body has parallel front and rear planar faces.
The chains are provided at spaced intervals with
links, each of which consists of two angular mem
bers 26B, as shown in Fig. 18. Each said angular
As shown in Fig,l 4, Fig. 5, and Fig. 21, each
clamping-mount 33 is provided with a pair of
depending lugs 45 and 45A, which have aligned
lateral bores. As shown in Fig. 4 and Fig. 5, a
pivot pin 46 is turnably located in the bores of
each pair of said lugs 45 and 45A.
Fig. 22 shows a trigger 41, which has a notched
head43 and a tai1‘48. _Each said` trigger.' 41.» is~v
spective; .tray~` isiunloadedi The .triggersßl caribe.
ñxeditoa respective-pivot pin 46. Each trigger;
thus set, at the.».tops.oficam-faces» 50.-`
'I§he;».second,embodiment of themeans for. sup-v
41;v is biased bygr-avity. or by a-springîtoftheihori-`
zontal position which is shown in :brokenlinesinz
Fig, 4. A conventional stop. may IbeY provided, in
order to prevent each trigger 41irom turning-be»
yond said horizontal position..
Referring to Fig. 4, wheneach clamping-mount` inoperative position. which is `shown
portingfthe; trays T will `now be described.
Fig.. '1 and Fig. .-1.1 show a. holderA frame 63.
which- has vertical legs 63A which areseparated
by a vertical space 1G.. As shown in Fig. 13, the;
bottoms of legs;53A are connected to a 'lf-shaped
in_fulllines intheflower partici Fig, ítandto>`
»Asshow-n in Fig..12, each leg 53A<has¢an`
which it is biasedby. therespective` two . springs.
angular: horizontal.. cross-section. Intermediate>
the top and bottom of holder frame 63, said;legs
63A are integral with` lateral. hubs` 64; and with
another. hub 80. Hubs 64 have: laterally alined.
3.5„the respectivetríggerü abuts the respective.
holder 24, s0 that the respective trigger t!! iszheld»
in. theiinclined positionwhich is shown. inFig'. 4
in .full.lines, with. the ,-respcctiveltail 48 below the
respectíve. head . 49.
Fig. 4. showsone of. a laterally. alined pair of
cam-.members 5l, each .of which is providedwith,
a lower planar face 56 which is. upwardly and
inwardly laterally inclined; with an intermediate
verticalplanar .face 53, and with-atop planar facel
52 which is inclined reversely tot bottom planar
face 50.. The provision ofthe top planar face 52
is optional.
These cam-faces 5U'. 53, and 52 are provided in 25
a. recessed end-face `of each. cam-member 5l.
The bottom of the setting station begins at.
thehorizontal lateral` line which connects the
. bottoms oi the lower planar; faces 5.0.
insert 63B.
cylindrical bores 6.5,_and.hub 80l hasa cylindrical.
bore 81, which is located:centrally,> between. legs?
Fig. 16.shows the couplingmember 60 whichis.
used in. the second. embodiment.
This > is-similar..
to. the coupling; member 25. of the ñrst em‘bodi-»ment. Coupling member 60. has aV cylindrical.
shank _8.3, a .threaded and reduced end-portion 85;
and bores 6 l; The shank 83 is located in the bore8| of. a. respective.“ hub 60, so that `the- respectivel
holder frame 63 is freely turnable relative to.
shankV 83. This` turnable assembly is maintained“
by a nut whichis‘screwed uponfend-portion. 85..
Thefcoupling member. 60' isV clamped to` a linl:V
which‘ consists of’a> pair` of members 26B, asain
the first embodiment» In each embodiment, theA
respective holder. canbe. turnably mounted. upon
a pivot which turnably connects a pair of links`
ofthe conveyor chain.
Figs. 8 and 9 showa supporting frame 55; which
As shown in Fig. 4, Fig. 5, and Fig. 2l, each
clamping-mount. 38 has.- an` upstanding vertical
armç4û, which is .provided with a vertical recess
4l, whose.end-wall.has.a.hole.44. Fig. 20. shows
one oi tbe angular clamping- springs 42. Each
clamping spring42has ar perforated leg 43, which. t ‘ is pivoted-to, frame 63, by» means of a pivotrpinV
íits in a respective recess 4|.
Asuitable bolt or
~rivet clamps each clamping spring 42 to its re
spective arm 45.. The. bent. clamping springsAZ.
Sëwhich is located in-the.- bores 65 of»` hubs-.64,
and inthe transversely alined bores B?œof bear»
ings 5S§of1frame 55. A biasing compression spring`
extend laterally` inwardly. towards each other,.
68 has its; ends located in respective recesses» 62
40 and ..6 9. offrames 55~and 63.
from their arms 40.
Each supportingframe 55 is` provided withV a.
The rods 32. are moved to the broken line oper-»
ative position shown in Fig..4., below` the load-pair of supporting lugs 58, for supporting the
respective part of` the respectivetray»Y T. Each
ing- station at ,whicha tray. is loadedon four re
spective rods 32. Hence, when a tray is thus.
frame 55'also. has a. pairrof rolls 15 turnably:
loaded, the respective. two springs 42=are already 45 mounted on'studs which are fixed to said-frame.
in clamping position. These springs 4.2 `are bentl
55.? . Each frame 55 is; also provided with depend-`
awayfromfeach other when a trayy isloadedby
ing lugs. 56, which‘have alined bores 51. The'latch'
sliding it. horizontally into positiornso thatsaid.
1| whichzis shown in Fig. 17 has avheadz13rand a
twobent springs 42 then resiliently.. clampfthe.
tail 12, anda bore 14. A latch 1| ispivotally con
respective tray.
At the bottom of; the setting` station, the
rounded. ends32C of the respective rodsÍ 32 con.-A
tact with the inwardly` inclinedcamffaces 50. so
that the respective rodsY 32` of the respectivey
holders 24 are pushed laterally inwardly towards.
each other, against the'force- of the four respective
biasing springs 35,4 while the twofront runsof.
the conveyor` chains are movedupwardly. The
broken~1ine position of the rod 32 in Fig. 4 shows
the limit of its respective lateral inward. move-1
ment. Each trigger 41 iszthus freed from the
respective holder 24, so that each trigger is turned
to and held in the horizontal position. which is`
shown inbreken lines in Fig. 4; by the biasing
force of‘gravity'or a spring. The end-walljotthef
tail 48 of'each trigger '-is‘ then. very> close to the.
respective planar transverse wall of the respective »
holder 24. When the rods 32‘rise above the tops
ofithe'vertical faces 53, the springs 35 laterally.
outwardly force the four rods 32. The end-facez
of each tail 48` is thus ’firmly Apressed againstthe
respective holder 24, so that the triggers 41. re.-V
main in the operative .positions whichare. in-.l
dicated. by broken lines in Fig, 4, untiltheare
nectedztoeachipair of lugs 55, by~meansota pivot`
pin-.which islocated inthe- respective bore 14, and.Y
inithe'respective bores 51.
As in the first embodiment, gravity or a spring-.
biases each 1atch‘1lto a horizontal position, said
position beinglshown in full lines in Fig. '7. A stop
is provided to prevent eachlatch 1I from turning
beyond’said horizontal position.
The rolls 15 ride>` against .thecam faces 50, ¿3`
and 52 which are shown in Fig. 4, because the
cam-members5l are also used in the secondem»
Below the locking station and the loading sta~
tion in_the frontruns `of the chains, the; position
of each supporting frameï55frelative to its ‘holder
` frame 63 is shown in broken lines'in‘Fig. 7.
At the loadingxstation; each supporting' frameV
55 is’ located as shown. inl full lines. in Fig; ’1.
Hence, when a ti'ay1is: slid horizontally into posi
tion; the -two respective supportingfframes 55 have
been- pre-set-into the full-lineposition of Figf'l.
As thexfront runs of the chains are vmoved-'up-A
wardly, the-two' `pairs ofy rolls>` 15 Contact with
lthe two. carnffaces` 50,.so that. the top of‘eachi
supporting frame 55 is forced"towards"theftop“
of. its companion holder’frame. 63,.th11's com:l .
pressing the two respective springs 68. This per-`
mits each respective latch'iI to turn to the full
line position shown in Fig. 7. When the rolls 'I5
pass above the cam-faces 5I), the end-walls of the
tails l2 of the triggers ‘II abut the inserts 63B
of -the frames 63, so that each frame 55 is held
locked in the-full-line vpick-up position of Fig'. 7.
Each-tray is held clamped between a pair of
supporting frames 55. For this purpose, each
supporting frame 55 can optionally be provided
with a clamping spring of the type shown-in
Fig. 20.
Figßl illustrates the automatic unloading and
stop 16A is then moved up, in order to prevent
the feeding of the next tray. This stop 16A is
moved up-and-down at recurrent intervals, in
the usual manner.
The feeding mechanism also includes the usual
fixed stops 16B, which prevents the over-feed
ing of a tray T, so that each tray T is fed into
proper position at the loading station.
After the stack of unloaded trays has reached
a predetermined height, the machine automati
cally pushes said stack of trays off the unloading
or receiving platform, to a conveyer 'of any suit
able type.
For this purpose, I provide a single-revolution
of thefchains ZIJ and 20A. The top tray of the 15 clutch IIA of any conventional type, such as the
previously stacked, vertical pile of trays is shown
“Hilliard” single-revolution clutch. This single
in position A. The position of the next tray,
revolution clutch IIA includes a sprocket II,
stacking of the trays, at the rear vertical runs
whichis to beA released from the two respective
supporting frames 55,’is indicated by the refer
which is coupled to slow-speed shaft 3A by chain
Iû and sprocket 6.
When clutch IIA is tripped, it moves the
pusher-arm IIB in a single reciprocation. The
are lowered to the unloading position, the heads
13 of the two respective triggers ’II strike against
pusher-arm IIB is pivotally connected to a
the transverse edges of the tray in the “A” posi
pusher 541 When the clutch I iA is thus tripped,
tion. ~Each trigger 'II is thus turned to the in
pusher 54 is moved to the right of its position
clinedy position, which lis illustrated in Fig. 7. 25 which i's shown in Fig. 2, in order to push the
Each compression spring 68 and the force of
stack of piled trays off the unloading platform.
gravity will then turn the respective supporting
and pusher 5d is then moved back to said posi
frame 55 to the broken-line release positiontion, and its movement is then stopped until
which is shown in Fig. 7, so that the tray in the
clutch I IA is again tripped.
“B” position willv be released from the four re 30
Fig. 1 shows the location of a switch S which
spective lugsväß. Each tray is thus piled on top
controls the single-revolution clutch IIA. When
of the vertical pile of trays, with little or no
switch S is closed, said clutch IIA is tripped', in
shock. When the bottom tray of the pile is to be
order to impart a single reciprocation to pusher
released from the two respective frames 55, the
54, as previously stated. Switch S is closed when
heads ‘I3 of the t'wo respective triggers 'il will
its arm Sa is moved to touch contact Sb, by one
strike against the transverse edges of the un
of the descending rods 32.
loading or receiving platform on which the trays
Referring to the ñrst embodiment, as each
are vertically stacked. Said platform can be of
tray T is unloaded, the respective four rods 32
smaller dimensions than the trays, so that the
are released by the respective two triggers 41,
first or bottom tray is unloaded on said platform.
so that said four rods 32 are moved to their full
without moving the supporting frames 55 to said
line positions which are shown in Fig. 4, by
broken-line position.
the respective four compression springs 35. This
In order to unload the trays from the rods
movement is transverse to the plane of the paper
32, in the first embodiment, the heads 49 of trig
in Fig. 1. ’
gers 4'! strike against Vthe respective transverse
Switch S is located at a suitable height above
edges of the last-unloaded tray. This turns, the
the unloading platform, so that when the top
triggers 41 to theirY inclined positions, so that
tray of the stack is unloaded upon the top of
compression springs Säcan move the rods 32 to
said stack, a respective rod 32 will close switch S,
their release positions, in which said rods 32 re
50 as the top tray is unloaded from the conveyer
lease the respective tray. As in the second em
chains to the top of the stack.
bodiment, the rods 32 can be maintained in their
Immediately after said top tray is thus de
inner positions, in unloading'the bottom tray of
posited upon the top of the stack, the one-revo
the stack.
lution clutch IIA is tripped, so that the pile of
ence letter B.
As the two respective frames 55 20
Fig. 2 shows an electric motor H which has a
stacked trays is pushed off the unloading plat
shaft M@ Said shaft M is co-upled by pulley 9, 55 form.
belt 8, and pulley 5, to the high-speed shaft of a
The arm Sa of switch S is biased to the cir
speed-reducing mechanism which is located in
cuit-opening position, 'so that it Will open the
casing 3. This speed-reducing mechanism is not
control circuit of clutch IIA, as soon as the re
shown, because it is conventional` and well
spective rod 32 is moved below its switch-actuat
known per se. Said speed-reducing mechanism 60 ing position.
has a slow-speed shaft 3A, whose ends project
Said switch S and its control circuit are con
from casing 3.
ventional per se, so that they _require no detailed
Slow-speed shaft 3A is coupled to shaft I8 by
'sprockets I5 and Il and chain I5.
Since the switch S is operated only once, dur
The trays T are fed to the front ascending
ing each removal of a pile of stacked trays, there
runs of the conveyer chains 2li and 20A, by con
is minimum Isparking at the contact Sb of said
ventional feeding mechanism which includes an
endless feed-belt 16. Said feed-belt 'I6 is lo
In the second embodiment, the switch S is op
cated on two pulleys. The shaft of one of said
erated by the movement of a holding frame 55 to
pulleys has a sprocket I4, which is coupled `by
the release position which is shown in broken
chain I2 to sprocket 1V of slow-speed shaft 3A.
lines in Fig. 7, when said frame 55 and its com
Said feed-mechanism has the conventional
, movable stop -16A, which is moved down in order
to permit a tray T to be fed upon the conveyer
chains the frictional drive of belt 1B.
panion frame deposit the top tray of a stack,
upon the top of said stack.
I have disclosed preferred illustrative embodi
ments of my invention, but numerous changes
ative position, each said latch then holding the
respective supporting means against the biasing
and omissions and additions can be made without
departing from its scope. The scope of the in
means which bias the respective supporting
vention includes the sub-combinations disclosed
means to inoperative position.
herein, in addition to the entire mechanism.
3. In a machine for stacking objects, endless
In each embodiment, the ascending and paral
conveyor means which have an ascending portion
lel vertical runs of the conveyer chains have
and a descending portion, actuating means to
respective pairs of holders which are directed
actuate said conveyor means in an endless path,
laterally towards each other between said runs.
said machine having a loading station at said
Each holder comprises a member 24 or 63 which
is connected to the respective run, and movable
supporting means 32 cr 55. The supporting
means S2 or 55 of one run are movable laterally
towards and away from the other respective run.
The supporting means 32 and 55 are biased to
inoperative posi-tion by respective springs 35 and
68. The machine has automatic setting means,
exemplified by the Cam members 5I but not lim
ited thereto, which set the movable supporting
means to operative position below the loading 20
ascending portions, said machine having pick-up
holder-devices for picking up the objects, said
holder-devices being arranged in laterally alined
pairs, each holder-device comprising a holder
member which is connected to said conveyor
means and supporting means which are movable
relative to the respective holder-member, said
supporting means being laterally movable to
wards each other to operative positions to pick
up an object and being laterally movable away
from each other to inoperative positions to re
lease the respective picked-up object, said sup
porting means being biased to inoperative posi
tion, automatic setting means which actuate said
which is movably connected to the respective
supporting means to operative position below said
holder and which is biased to operative position. 25 loading station so that each pair of holder-de
station. Each said holder has automatic means
for maintaining the respective supporting means
in operative position, as exemplified by a latch
vices picks up a respective object at said loading
In the illustrations disclosed herein, each latch
is pivotally associated with the respective sup
station, each said holder-device having a latch
porting means, even though there is no direct
which is movable relative to the respective
pivotal connection between the supporting means
holder-device and which is biased to latching
and the latch. Each latch is moved back into 30 position to hold the respective supporting means
inoperative position when an upward force is
in operative position when said supporting means
are thus actuated into operative position, an un
exerted thereon.
loading support for supporting the released and
I claim:
1. In a machine for stacking objects, a pair
stacked objects, said support being located at said
of endless conveyor chains which have respective 3.3 descending portions, each said latch being located
to contact with the next preceding object which
ascending runs which are parallel to each other,
said machine having a loading station between
the tops and bottoms of said ascending runs,
means to actuate said chains in unison, said
chains having respective pairs of holders, said
holders being directed laterally towards each
is supported on said unloading support, said con
tact moving said latch to unlatching position.
4. A machine according to claim 3 which has a
pusher for pushing the stacked objects 01T said
unloading support, said machine having push
mechanism for actuating said pusher, said push
other between said runs, each said holder com
prising a member which is connected to the re
mechanism having a control member which is
spective run and movable supporting means
located above said unloading support, said push
which are movable laterally towards and away 45 mechanism being actuated to operate said pusher
from the other respective run, the movable sup
in a, single stroke when said control member is
porting members of each said pair being con
structed and shaped to hold a respective object
intermediate said runs when said supporting
means are in operative position, biasing means 50
which bias said supporting means to inoperative
actuated, said control member being located to be
actuated by a respective supporting means when
said respective supporting means is moved to in
oiperlative position to release the top object of said
s ac
position, said machine having automatic setting
5. In a stacking machine, the sub-combination
means which are operative to force said support
ing means into operative position below said load
ing station so that said supporting means pick
up said object at said loading station, each said
holder having automatic means for maintaining
the respective supporting means in operative
of a conveyer, a holder-device connected to said
operative position and being moved into operative
member being biased to its inoperative position,
position when said supporting means are moved
a latch movably associated with said supporting
conveyer, said holder-device comprising a holder
member which is connected to said conveyer and
a supporting member which is movably con
nected to said holder member, said supporting
member being movable relative to said holder
position, said automatic means comprising a
member to an operative supporting position and
latch which is movably connected to the respec 60 being also movable relative to said holder mem
ber to an inoperative position, said supporting
tive holder, said latch being biased to move into
to operative position, each said latch being moved
member so that said latch and said supporting
to its inoperative position when an upward force 65 member are movable in unison relative to said
is exerted thereon.
holding member, said latch being biased to an
2. A machine according to claim 1 in which
operative latching position in which it abuts said
each said latch is pivotally associated with said
holder-member to maintain said supporting mem
supporting means; each said latch being located
ber in predetermined operative position relative
intermediate the respective holder and its respec 70 to said holder-member.
tive supporting means when said latch is in oper
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