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Ju?y??, W46.
1
J. E. UNDERWOOD
294959974
METHOD AND MACHINE FOR- ASSEMBLING ARTICLES
Filed April 12, 1943
13 Sheets-Sheet 1
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J. E. UNDERWOOD
2,405,0?4
METHOD AND MACHINE FOR ASSEMBLING ARTICLES
Filed April 12, 1943
13 Sheets-Sheet 2
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INVENTOR.
July 30, 1946”
J. E; UNDERWOOD
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METHOD AND MACHINE FOR ASSEMBLING ARTICLES
Filed April 12', 1943
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Patented July 30, 1946
2,405,074
UNITED STATES PATENT OFFICE
2,405,074
METHOD AND MACHIN E FOR ASSEMBLING
ARTICLE S
.
James E. Underwood, Oakmont, Pa., assignor t0
Aluminum Company of America, Pittsburgh,
Lilla” a corporation of Pennsylvani
Application April 12, 1943, Serial ‘No. 482,739
14 Claims.
1
‘This invention relates to improvements in ma
chines of the class adapted to assemble a disc,
wafer, washer or other shape made of relatively
thin or pliable material with a receiving mem
ber. The problems to which the invention is spe
c‘i?cally directed are those attendant upon pos
itive,'accurate and relatively rapid assembly of
thin metal‘wafers with cup-like or tubular ar
ticles, but the principles of the invention are use
ful in, and may be applied with equal facility to,
the assembly with another article ‘of a shape com
posed of any thin, pliable or di?icultly handled
material, all of which shapes will be referred to
herein and, in ‘the appended claims, as “thin
shapes.”
‘
'
'
2
ticular purpose, the various principles of this
invention.
The machine shown in the appended drawings
and herein speci?cally described is designed to
produce a detonator tube assembly. Two parts
are to be assembled. One, the detonator cup, is
tubular in form with an open end and a partially
closed end. The other is a foil wafer adhesively
treated on one side and cut, during the operation
of the machine, to such size that it may be seat
ed within the detonator cup in position to com
pletely close the partially closed end thereof.
When so seated, with its adhesively treated side
.in contact with the tube, the foil wafer is adapt
ed to be adhesively united to the tube, thus seal
ing the partially closed end thereof. The ele
ments of the machine which insure this result
may be generally described as an article handling
system including a hopper assembly and a feed
20 assembly adapted to feed detonator cups from
the hopper to the machine in predetermined ori
ented position, a foil supply and feed asembly
adapted to feed foil from which said wafers may
‘be cut to the operation and to remove therefrom
25 scrap or unused foil, a turret assembly adapted
to receive cups from the feed assembly and to
present the cups to the various work stations, a
die and punch assembly adapted to cut wafers
‘from
the foil supply and to feed said wafers to
30
the cups, 2. ‘hot punch assembly adapted to seal
the wafer to the cup and if desired, an inspec
tion unit adapted to search each detonator tube
assembly to determine if it is properly assembled
to reject imperfect assemblies. These elements
35 and various cooperating elements are all shown
'
Among the more general objects of, the inven
tion is the provision of a machine, and compo
nent parts thereof, which will operate continu
ou'sly and at a relatively high speed to perform
an assembling operation; which will accurately
and positively handle thin wafer-like parts; which
will accurately and positively handle relatively
heavier parts of di?erent or the same shape;
which will maintain a constant flow to the point
of assembly of the parts to be assembled; which
will bring all parts to the point of assembly in
proper position and will there accurately position
the parts with respect to each other; which will
perform operations on the assembly to unite the
parts or otherwise permanently establish the as
sembled relationship and which will automati
cally and continuously inspect the ?nished as
semblies and reject the imperfect. Among other
objects is the provision of machines which will
automatically and continuously perform all or
a part of these indicated steps in predetermined
sequence without intervention of the operator.
in the drawings in which:
A further object of the invention is the provision .
of‘improved machine ‘assemblies and parts there
of adapted to perform, singly or in combination,
the‘ functions above enumerated. Another object
is the provision ‘of an improved article handling
(01. 154—-1)
40
system adapted to present to a work station from
‘Fig. 1 is a side view of a, machine embodying
the invention;
Fig. 2 is another side view of the machine at
90° to the View of Fig. 1;
Fig. 3 is a view taken from above the machine
as indicated at line 3—-3 on Fig. 1;
r Fig. 4 'is a horizontal section taken at the line
an unoriented mass of cup-‘like or tubular arti
cles ‘a flow of-said articles each in a predeter
4-4 indicated on Fig. 1;
mined oriented position. Another object is ‘the
provision, in ‘combination, of machine elements
and‘pneumatic means adapted to furnish a shape
chine shown in Fig. 1 taken at the line 5-5 indi
cated on Fig. 1;
Fig. 5 is a partial vertical section of the ma
from.‘ a supply of thin or pliable material and
to, thereafter positively and automatically main
tain ‘said shape in predetermined positions dur
ing handling, and working operations. Other
and "further objects will appear in the following
description of a machine, and parts thereof,
which embody in preferred form and for a par
50
Fig. 6 is a partial vertical section of the ma- '
chine taken in a plane at 90° to the section shown.
in Fig. 5;
Fig. 7 is a Vertical section taken through the
hopper of the machine, ‘as indicated at line 1-1
on Fig. 1 with parts omitted;
‘Fig. 8 is a side view of the hopper with certain
parts cut away to show-detailthereof ;
2,405,074
3
tion of the tube handling and feeding mecha
nism to which the tubes are delivered from the
shaft 28. Speed reducer shaft 29 with its sprock»
et 35 drives shaft 3! through chain 32 and the
sprocket 33. A clutch generally indicated at 34
hopper;
and actuated by handle 35 engages and disen
a Fig 9 is a vertical section taken through a por
gages speed reducer sprocket 30, thereby start
ing and stopping all elements driven thereby.
‘Shaft 36 is driven off shaft 3| through bevel gears
Fig. 11 is a verticalview, partially in section,
of the die and punch assembly;
' '
31 and 38. The free end-39 of shaft 36 drives
Fig. 12 is another vertical view of the die and
the foil rewind reel l'l through a friction clutch,
punch assemblyat 90° to the view shown in 10' not shown. A pump 40, designed to furnish vacu
Fig. 10 is a vertical sectional view taken at the
line l0—iil indicated on Fig. 9;
Fig. 1.1;
um or air to a pneumatic system through valve
will, is driven through gears 42, 43 from the motor
’
Fig. 13 is a vertical sectional view through the .
turret also showing portions of other cooperat
ing parts;
v ‘ ‘driven end of the speed reducer shaft.
Fig. 14 is another view, partiallyin section, of
said turret and its driving mechanism;
Fig. 15 is a top view of the transferslide asT
sembly;
Fig. 16 is a vertical sectional view, taken at
line Iii-i6 on Fig. 15, of the transfer slide as
sembly and the lower part of the feed assembly;
Fig.1? is a View of the lower portion of the
feed assembly, taken at line. l'l--ll'l on
16';
M, 55, 46 actuate the Geneva drive 9. The hot
punchassembly i9 is reciprocated toward and
, . away from turret station C by linkage 5!} which
is actuated by eccentric 59 mounted on shaft
3!. The transfer slide assembly I0 is recipro
20 cated toward and away from turret station A by
linkage 52 which isv actuated by eccentric 5|
mounted .on shaft 3|.v Gear 53 mounted at the.
‘end of shaft 31 drives‘the inspection unit 2|
Fig. 18 is a vertical sectional view through the
hot punch assembly;
'
,
s
‘
through chain 54 and gear 53'.
"
.
The movable portions of die and punch as
1
‘Fig. 19 is an end view of the hot punch as
sembly, taken as indicated‘ by line I9-l-l9 on
Fig. 18:
Valve 4!
is driven by shaft 36 through gears 47, 48. Gears
'
sembly l8 and the knockout pins 55, mounted, re-v
spectively, on slides, 55, 51, are reciprocated to-,
I
ward and away fromthe turret stations by link-'
age 59 which is actuated by eccentric 58 mounted
of the .hot , punch assembly, taken as. indicated 30 on shaft 36. Eccentric 60,.1ikewise mounted-on
by ,the 1ine-2il-—-2il»on Fig. 18;
p
;
shaft 35,.actuates the foil feed mechanism l6.
‘ Fig. 20 is a .verticalsectio'n through a‘portion
Turning mechanism 6 is driven through pulleys
Fig. 21 is a representation of a detonator. cup
before assembly;
_
_
1
Si, 52 and belt 63 from hopper drive‘shaft 28.
It will be understood that the driving parts are
'
' Fig. 22 is a representation of the foil wafer
which is to be assembled with the detonator cup ‘_
to form the ?nal detonator tube;
Fig. 23 is a vertical section taken through
the-foil feed mechanism;
Fig. 24 is a view taken at the line 24-24 as
indicatedin Fig. 23; and
Fig.'25 is a view of the guide plate and its
mounting taken in the direction 'of. the arrows
25-25 in Fig. 8.
'
.
.
_
'
Referring now to Figs. 7, 8, and 25, the hopper
3 consists of an article-receiving portion 64 ?xed
40 on post 2'. Parts 65 and 55 are carried by part
Like numerals refer to like parts throughout
the several views.
coordinated to cause simultaneous action at all
stations on the work simultaneously presented to
those stations by the work translating device.
.'
84 and, together with the rotatably mounted
hopper ring parts 67, 51', form an extension
thereof. The articles placed in the receiving por
tion 64 are admitted to the extension thereof
through opening 68 which may be closed by
[The general organization of the machine is best
means of a gate 69 supported for verticalmove
shown by Figs. 1, 2 and 3. The machine is'car- .
ried by a frame most parts of which are gen
erally indicated by the numeral 1. ,Mounted on
ment on rod 70, bracket ‘H and handle ‘[2. Finger
“[3 is rotatably mounted in the bottom of receiv
ing portion Mfand, ,by'means of knurled knob
this frame is the article handling system consist;
74, may be swung to facilitate passage of the
ing of'the hopper 3 mounted on post 2,’ the trans
cups‘throu‘gh the opening 68. The hopper ring
fer tube 4, the turning mechanism 6, the chute
parts 51, 61' are adapted to include, in assembly,
the selector such ‘as a pin ring 15 which carries
a multiplicity of pins '17 mounted therein at the
mechanism 1 and the transfer slide assembly [0.
A work translating means such as turret 8, actu
ated by Geneva drive 9, is adapted to, receive .
work at turret station A ‘and to present it to
various assembly operations at stations B and C.
A foil supply and'feed system includes supply
reel-l I from which the foil l2 travels over rollers
l3, M and I 5 through foil feed mechanism l6
over roller 5 to rewind reel I1. Mounted above
turret 8 at station 13 is the die and punch as
sembly l8. Mounted at station 0 is the hot punch
assembly l9. Leading from turret station D
(shown in Fig. 13) are transfer tubes 20 which
deliver ?nished assemblies from that station to
an inspection unit 2|. A pneumatic system, not
shown in detail, cooperates with various ofthese
elements, as will be later described.
angle shown in'Fig. 8. It will be understood that
pins 11 are provided entirely around pin ring 16'
and extending'inwardly, although for purposes
of clarity only that pin adjacent the section line
is shown in Fig. '7v and only a representative num-‘
ber of pinssufficient to show their spacing is
shown in Fig. 8. The guide plate and associated
parts are also omitted from Fig. 7. Parts 61, 67',
and pin ring 16 are secured together as by bolts
'18, and the assembly is ?xed- on shaft 19 whichv
shaft is rotatably mounted in bearing portions
Stand is driven by shaft 28'through the pinion
8i and gear 82.
Guide plate 83 is formed of a
central portion substantially concentric with pin
ring 16 (as shown in Fig. 8) and with its oppo
The driving mechanism of the-machine islbest TO site ends84, B5 turned inwardly therefrom. The
shown by reference to Figs. 1, 2-, 4, 5, 6 and '7. ' A11
motive power is derived from .motor 22 which
drives speed reducer 23 through belt .24 and the
guide plate is mounted for limited movement
around axle 86 of guide ‘bracket 81, its limited
movement on said axle being positively governed
pulley shown. shaft 25 of the speedy reducer
by "pin _88;which is positioned on guide bracket
drives the hopper 3>through ‘gears 26 and2‘lv and 75 collar»‘89 and'extends within ‘the cutaway por-f.
2,405,074
tion of guide plate end 84. The guide plate
bracket 81 is secured to a boss 90 on hopper part
65. A spring 9I surrounds the axle of guide
bracket 87 with one end 92 thereof ?xed to the
bracket and the other end thereof bearing against
a pin 93 on guide plate end 84 so that the spring
tends to resist downward movement of the guide
plate and to return it to normal position Where
ment to limit the forward motion of each cup as
it frees itself of the transfer tube 4 and thus leave
the cup on the ?oor at the position X indicated
in Fig. 9. In this position the cup lies across the
travel of members I01 each of which has an end
portion shaped to receive the cup. The outlet
from the chamber to passage it? affords means
positioned in the path of travel of the ?ngers
its'central portion is concentric with pin ring
"it. Mounted on the end of guide plate 83 is 10 it? to receive and remove the cups from the
chamber as they are swept across the ?oor by
the flexible ?nger 94 and on the other end the
said fingers, and the passageway 97 and chamber
bracket 95 upon which is carried the terminus
H2 are so proportioned as to maintain the cups
96 of transfer tube ‘3. In Fig. 8, the collar 89
in the side-by-side relationship established by
(Fig. 25) is removed to show the cutaway por
their ?ow through this aperture. Thus, the end- 7,
tion in guide plate end 34 to receive pin 85, and
in Fig. 25, the ?exible ?nger 84 (Fig. 8) is re 15 to-end ?ow of the cups originally established in
tube 4 is terminated and the ?ow re-established
moved for clearer showing of the guide plate
mounting.
in side-by-side position without, however, change
In operation, the cups, having been admitted
‘ from the cup-receiving portion of the hopper to
the extension of the hopper through the open
ing 68, tumble to the bottom of the hopper ex
tension as the ring portions are rotated by shaft
"#9 and carry the pin ring ‘i6 with them through
the mass of tumbling cups. In their travel, the
pins TI enter the open ends 98 of detonator cups
99 (see Fig. 21) and bear the cups upwardly in
a clockwise direction, as shown at Fig. 8. There,
in the orientation of the cups originally ?xed by
the selector hopper to present the perforate bot
tom of the cup toward the station to which the
cups are travelling. The bottom portion of mul
tiple chute chamber I I2 is divided, as shown in
Figs. 2, 9 and 15, but best shown in Fig. 1'7, into
five cup feeding passages by the dividers or ?n
gers H3, H3’. Each of said passages terminates
at a ?xed position H4.
The detonator cups fall
into the chamber IE2 from where they pass into
the ?ve cup feeding slots, the lowest cup in each
slot lying in the terminus position H4. Fingers
as the rotation of the pin ring brings the pins
toward an angle below the horizontal, the ends
of the cups are contacted, and are held upon 30 H3 are carried upon cross bar III while the ?n
gers H3’ are carried upon cross bar III’. These
the pin, ?rst by the flexible ?nger £34 and later
by the central portion of the guide plate 83, and
ross bars are mounted on housing plate IIO for
vertical movement with respect thereto, and the
the cups are thus continuously held upon said
pins until they reach the end 85 of the guide
end of each cross bar is provided with a roller
lit. The cross bars are held together in normal
plate, at which time they lose contact with the
guide plate and fall by gravity into the terminus
96 of transfer tube 4 and travel downwardly
through said tube with the closed ends of the
position through the medium of spring loaded
bolts i H.
The cross bar rollers IIS are so ar
ranged that a wedge or pin, such as agitator pin
I it, forced between said rollers, will separate the
cross bars against the action of the springs on
bolts ! IT, thus moving ?ngers I I3’ apart from ?n
detonator cup 99 in the forward position. In
the event that a cup is wrongly seated upon a
pin 71 or becomes canted thereon or otherwise
gers I I3 and imparting movement to the mass of
tends to jam against the central portion of the
guide plate 83, damage is prevented as the guide
cups lying in the, chamber II2, which movement
plate yields by partial rotation against the spring . facilitates passage of the cups into the cup-feed
ing slots. The cups, lying in the bottom of the
9! around the bracket axle 86, said spring return
cup-feeding slots in position to be fed to the tur
ing the guide plate to its original position after
the pressure is removed.
ret mechanism, present their closed ends I00
toward the turret 8 at turret position A, this ori
Detonator cups entering transfer tube 4 fall
therethrough by gravity, their partially closed 50 entation of the cups having been achieved by the
turning means above described, which, while
ends forward, to the ?oor of the turning mecha
changing the downward travel of the cups from
nism t‘, the details of which are best shown at
an endwise fall to a sidewise fall, does not dis
Figs. 9 and 10. The turning mechanism, posi
turb the disposition of the cups originally estab
tioned between the hopper 3 and chute mecha
lished on delivery to transfer tube 4.
nism l, provides for feeding the endwise-falling
65
detonator cups into transfer slot 91 in a sidewise
position. For that purpose the turning mecha
nism consists of a wheel Hi2 ?xed upon a shaft
The turret 8 has positioned on its periphery a
number of cup~receiving chucks I20 in each of
which are provided the cup-receiving apertures
I153 (as best shown in Fig. 14). When a chuck
I20 is presented at turret station A these aper
£63 which is rotated by means of pulley 62 ?xed
on the end thereof, belt 63 (see Fig. 2) and the 60
tures have the same axis as the termini I I4 of the
pulley 6i mounted on hopper drive shaft 28. Car
?ve cup slots which lie at the bottom of the mul
ried by wheel Hi2 are ?ngers I01 which are yield
tiple chute i i 2. Cups are periodically transferred
ingly, but ?rmly, held by springs I08 against the
from their position at termini I I4 to the aper
?oor 599 of the circular chamber. The housing
plates Iii] are cut to form a slot 91 leading from 65 tures I43 of a turret chuck I 20 by the transfer
slide assembly I0.
its aperture in the floor of the transfer chamber
Transfer assembly !0, shown at Figs. 1, 3, 6
to the multiple chute chamber H2. The deto
and 13 but best shown at Figs. 15 and 16, con
nator
having been oriented by the selector
sists of a carriage I2 I mounted on frame 5 for
‘56 and delivered thereby to transfer tube 4 in
oriented position with their closed ends forward, 70 periodic translation toward and away from tur
ret station A by the linkage 52 which is actuated
pass through the tube in end-to-end position, the
by eccentric 5| mounted on shaft 3|. Rods I23,
shape and size of the tube 4 being such as to
corresponding in axial position and number to
maintain an end-to-end flow. They are thus
cup chute termini II 4 and to turret chuck aper
singly delivered to the ?oor I09 of the transfer
chamber where housing plate, I It forms an abut. 75 tures I43, are mounted in said carriage. Each
such rod consists of a forwardly extended portion
2,405,074
7
and a rearwardly extending portion and of a
slide bearing portion I25 which latter is posi
Movement of the turret successively presents a
chuck I20 to station A to receive the detonator
cups, to station B to receive the foil wafers, to
tioned in rod chamber IN and normally held at
station C to ‘present the work to the hot punch
oneend thereof by spring I28. vMounted on the
assembly I9 and to station D1 where the ?nally
carriage is bracket I29 which carries the agita UK assembled detonator tubes are discharged, with
tor pins II8 whose function, as above described,
the help of knockout pins 55, into transfer tubes
is to pass between rollers H5 and cause separa
20. During the'rotation of the turret, the inner
turret surface I45 continually contacts station
ary vacuum shoe I46 which is ?xed against turret
of these pins I I8 are notched, as shown at I30, to 10 surface I45 (by means of bracket-carried pin I41,
agitate the rollers as they pass therebetween, thus
arms I48 and springs I49) to cover that segment
imparting a jerking movement to the cross bars
of the inner turret surface which is, at any given
and the ?ngers attached thereto. In Fig. 17
moment,
at and included between stations B and
which is otherwise a view on line Il--I'I of Fig.
C. Thus means are furnished whereby vacuum
16, the agitator pins IIS and transfer rods I23
may be maintained in the vacuum chambers I50
are shown in 7 advanced position.
Likewise
and I5I formed by the vacuum shoe and turret
mounted on transfer slide carriage I2I by means
surface I45 when the passages I44 are. sealed by
of brackets I3I and pin I32 is the pivoted arm I33
an impervious article seated in the cup-receiving
which is normally positioned, by action of spring
apertures I43 in which said passages terminate.
I34, as shown in Fig. 16, to place its downward 20
Positioned at the intermediate turret station
ly extending portion I35 directly behind the rear
midway between station D and station Ais an air
ward ends of, the pins I23. Mounted separately
feed mechanism I 52 which furnishes a continued
of the assembly III and on ?xed bracket H9 is
air blast through the passages I44 and apertures
switch I35 which carries switch arm I31 on
tion of the cross bars which carry fingers I I3 and
H3’ in-the multiple chute assembly. The ends
switch shaft I33. Switch arm roller I39 is adapt 25 I43 to clean foreign matter therefrom. Plate I53
positioned between turret station C and turret
ed to be contacted by the surface I45 of the arm
station D is concentric with the turret periphery
I33 when it is raised against the action of the
and prevents'loose detonatorcups from falling
from the chucks during movement between these ,
In its normal cycle, the transfer slide assembly
In going forward from the position shown'at 30 stations. Parts I54 and I54’ form a guide to gov
cm the fall of such cups as are not, for one rea
Figs. 15 and 16 brings its rods I23 through aper
spring I34.
son or another, well seated in chuck apertures I43
tures in the chute housing into the cups 99 which
by the action of the transfer assembly.
lie in termini II4. Under continued forward mo
Foil wafers (shown in Fig. 22) , which are to be
tion the rods contact the semi-closed ends I00
of said cups and carry the cups through aper 35 preliminarily seated in the detonator cups at sta
tion 13 and ?nally cemented thereto at station
tures I4I into the cup-receiving apertures I43 of
that chuck I25 which is, at that moment, posi
tioned at turret station A.
Simultaneously the
agitator pins IIS passing through the apertures
I42 in the multiple chute housing IIII contact
and pass between the rollers H5, thus causing
relative movement of ?ngers H3 and H3’, as
above described, and facilitating movement of
the cups into the cup slots therebetween. At the
end of this operation the transfer slide assembly .'
is again returned by linkage 52 to its original
starting position from where the cycle is again
C, are cut from a supply ‘of foil furnished to the a
cutting die and punch at station B. The partic
ulars of this i'oil supply will now be described
with reference to Figs. 1, 3, 6, 23, and 24.
The foil is supplied to the machine from the,
undriven foil reel I I which rotates to deliver foil
I2 only when foil feed mechanismv I6 pulls the
foil. Foil reel I'I, constantly drivenroff shaft 36
through a friction clutch, rewinds the foil matrix
from which the foil wafers have been cut.
The
general path of the foil is from reel II, under
roller I5, thence above turret station B where the
repeated as the next chuck I23 is indexed at tur
cutting of the wafers takes place, thence through
ret station A. If a cup lying in the cup chute
termini H4 is bent or otherwise damaged or is 50 foil feed mechanism I3, over idle roller 5 and
?nally onto reel I'I. Sincecutting of the foil
wrongly positioned so as to prevent the free pas
. takes place intermittently as each turret station
sage thereinto of a transfer rod I23, the rod
yields backwardly against the action of spring
I28 until its rearward portion contacts the down
wardly extending portion I35 of the arm I33,
is indexed at station B, the foil feed action is like
wise intermittent so that the foil will be station
ary during the cutting operation at static-n B and
will move forward at the end of that operation
to present to the next cutting operation, as the
thus raising the arm into contact with the roller
of the switch arm I31 and tripping the switch I36
next turret chuck is indexed at station B, a new
to stop the machine and allow removal of the
uncut portion of foil. To this end the foil feed
offending cup. The downwardly extending por
means I5, which is supported by bracket I55, in
tion I35 is notched to allowthe upper pair of rods 60 the
position shown in Figs. 1 and 3, includes a
I23 the same, clearance as the lower three rods
knurled foil-idriving roller I55 against which‘ the
as shown in Fig. 2 and by the dotted line in Fig.
foil is held by the rubber roller I51, carried on
16.
'
Referring now to Figs. 1, 5, 6 and particularly
to Figs. 13 and 14, the turret 8 is actuated by a
conventional Geneva drive 9, indicated by the
Geneva wheel I04 and the driving gears 44, 45, 45,
' to momentarily index and halt the chucks at suc
cessive positions counterclockwise including op
eration stations A, B, C, and D and the stations
intermediate thereof. Each turret chuck I23 is,
as above described, provided with a number of
cup-receiving apertures I43 (?ve as here shown).
Passages I44 connect the bottom of each such
aperture I43 with the interior of the turret 8._ 75
shaft I6I', which is carried, with weight I58 on
bracket I59. This assembly of rubber roller and
weight may be lifted, when desired, by handle
I80. The axle I6I, upon which is ?xed th'e
knurled roller I55, has ?xed on one end a ratchet
I52 upon which lie dogs I63 carried on a frame
I64 adapted to be oscillated around axle I6I by
linkage I55 which is, in turn, actuated by eccen
tric 60 on shaft 35. Thus, the dogs I63, which
are held in engagement with‘ the ratchet I62 by
springs I56, are adapted, upon movement of
frame I64,v to turn axle I6I at predetermined in
2,405,074
I tervals through a
predetermined arc, thus posi
tively rotating knurled roller I56 and advancing
10
foil from reel ii and causing slack between the
The ?nal position of the punch in its utmost low
ered position is shown in Fig. 13. During down
ward travelof punches I70, vacuum is applied in
punch chambers I73 thus insuring that the foil
wafers when out will adhere to the ends of the
punches and be carried thereby to the lower ends
I68 so that it may move upwardly as the foil is
which are in register with the passageways I44
the foil a predetermined distance.
It will be
readily understood that the foil feed mechanism
just described jerks the foil feed intermittently,
at predetermined intervals, thereby playing out
of the cups. The vacuum is terminated as the
feed mechanism and reel I7, which latter, being
punches reach the lower end of their travel and
constantly driven, promptly reels up the slack
foil. To prevent this jerking action from un 10 is replaced by an air blast which displaces the
wafers from the punches and forces them into
winding from reel II more foil than is used, co
position in the cups 99, thereby sealing the per
acting rollers I3 and It are provided on bracket
forated bottoms of the cups the perforations of
I67. Floating roll I3 is journalled in bracket slot
advanced to resist the foil advancing action, thus 15 which connect the apertures to the vacuum
chamber I 59. At approximately the same time
avoiding transmission of the initial tensioning
that the vacuum is broken in the punches and
shock to "supply reel II. Once the foil is ad
air is applied, the vacuum chamber I 59 formed
vanced and the tension imparted by the feed
by the vacuum shoe I46 and inner turret wall I45
mechanism is terminated, roller I3 gradually falls
under its own weight to the bottom of slot I63, 20 is supplied with vacuum to ?rmly hold the wafers
against the bottoms of the cups. However, during
unreeling as it falls sufficient foil ‘from reel II to
the downward travel of the punches and during
allow of this movement. Idle rollers I 5 and 5 are
the cutting operation no vacuum is maintained
conveniently located for the purpose of guiding
in chamber I559 lest the foil wafers be drawn
foil I2 in its indicated path‘. Foil I2 is adhesive~
away from the ends of the punches before the
ly coated on one side and is wound on the reel I I
with its adhesively coated surfaces outward so 25 punches have completed their downward travel.
On the other hand, in the chamber I5I, likewise
that said surface is presented downwardly at
formed between the vacuum shoe and the inner
turret station E.
wall of the turret, the vacuum is constantly
Located at and above turret station B is the
maintained to insure that the foil wafers will be
die and punch assembly I9 which provides a
means for cutting the foil wafers and placing the 30 ?rmly held in the bottoms of the cups as a turret
chuck indexes through‘ the intermediate station
cut wafer in detonator cups held in turret chucks
to station C and during operations at station C.
its as said chucks are presented to station B.
At station C is positioned the hot punch assem
Assembly I8 is carried on slide 56 and crosshead
I69 and is adapted to be reciprocated toward and 35 bly IS, the construction and general operation of
which will now be described with reference par
away from turret station B by linkage 59 actu
ticularly to Figs. 18-20, inclusive, and Fig. 13.
ated by eccentric 53 mounted on shaft 36 (Fig. 5).
The hot punch assembly is mounted on plate I89
The die and punch assembly consists of punches
which is adapted to be reciprocated toward and
17d (here shown as ?ve in number) positioned in
away from turret station C on slide plate I93 by
axial alignment with die apertures I'II in the die
plate £72 and with the cup-receiving apertures 40 linkage 59 actuated by eccentric 49, the latter be
ing mounted on shaft SI. The hot punch assem
£723 in the turret chuck I2? (see Fig. 13). Cham
bly consists of hot punches I9I (here shown as
bers E73 in punches I79 are provided to admit air
or vacuum to the work, which air or vacuum is
supplied to said chambers through‘ duct I74 and
chambers I75. Stationary block I77 ?xed to the
machine frame I, as is die block I72, by bolts I78,
forms with the die block a passage I79 through
which‘ passes foil I2. Attached to crosshead IE9
is cam plate I76. Mounted in stationary block
I1? for vertical movement is the die stripper plate
I80 which‘ is forced downwardly by action of
springs I SI when the crosshead and punch as
sembly is moved toward the die, thus clamping
the foil strip ?rmly against the die block for the
punching operation.
As the punches are re
tracted upwardly, the surface of the upward
moving cam plate lit pushes cam followers I92
outwardly (as shown in Fig. 11), thus raising
lever arms 583 against springs IBI.
The cup
receiving apertures M3 in the turret are accu
rarely aligned with the punches and there main
tained throughout the punching operation by in
dexing arrangement consisting of pin and aper
ture I85. In operation, the foil, after having
been advanced through‘ passage I79 by the foil
feed means above described, comes to a halt be
fore a turret chuck I253 is completely indexed at
station B. The crosshead I69 and its punches
I79 are then lowered causing stripper block I89
to press the foil against the die plate I72 as the
punches cut through the foil and carry the foil
wafers thus cut and seated on their ends through
the die apertures I'II beyond the die plate and
into the bottom of cups 99 seated in the chuck.
?ve in number) which are in axial alignment and
in like number with the cup-receiving apertures
of a chuck I 26 indexed to station C and are like
Wise in like number and axial alignment with
the apertures I92 in the stripper plate I93 which
is ?xed, as shown, by brackets I94 on the slide
plate I90. Heating elements 595 disposed in
punch block I 96 maintain a proper predetermined
temperature in block and punch.
Suitable elec
tric connections, generally indicated at I97, fur~
nish electrical energy to the resistor type heating
elements. Rods I99, restrained against unlim
ited forward movement under the action of the
springs I99 by collars 251i} bearing on wall ZOI,
are positioned immediately behind each of said
hot punches I9I and maintain the punches in
working position, as shown in Fig. 18. In opera~
60 tion the hot punch assembly advances as the tur
ret chuck indexes and dwells at station C. The
punches pass through the apertures I92 in the
stripper plate I 93 and thence into the cup 99
and against the foil wafer I {i5 positioned at the
bottom thereof and there held by vacuum from
chamber I5I. The heat and pressure thus fur
nished by the punch acts upon the coat of adhe
sive positioned on that side of the foil wafer
which contacts the bottom of the cup and ?rmly
cements said foil wafer to the detonator cup bot
tom. The pressure exerted by the hot punch
tends to move the punch backward against the ac
tion of the spring loaded rods I98 which ?rmly
but yieldingly, as to prevent breakage or damage
to the Work, hold the punches in position against
2,405,074.
11
the foil wafer.
12
tively presented to those stations and that the
At the end of a short time the
chuck containing the cup whose travel is now in
hot punch assembly is reciproca-ted away from
the turret, the stripper plate I93 insuring that
question had been preliminarily indexed at the
station intermediate A and B. The chuck having
the assembly of detonator cup and foil wafer,
indexed at station B, the crosshead I69 bearing
which sometimes adheres to the hot punch, is not
punches I10 descends cutting from foil I2 a wafer.
withdrawn from the turret chuck.
To facilitate the cutting operation, a lubricant
Knockout pins 55 mounted on slide 51 (see
may be previously supplied to the metallic vfoil
Fig. 5) operate after a turret has indexed at sta
surface by some device such as lubricating pad
tion D to push the now assembled detonator tube
I81 held by clamp I85 (Fig. 6). As the punch de
from the chuck and into the transfer tubes 20 10 scends, vacuum is furnished thereto through duct
which, as shown, lead to the inspection unit but
I14 and punch chamber I13, and by reason of said
which, if desired, may lead to a convenient recep
vacuum the foil wafer, as cut, is held ?rmly on
tacle if an inspection unit is not used. Said
the end of punch I10 until that punch‘ substan
knockout pins are in axial alignment and in like
tially reaches the full length of its stroke, at
number with the passages I44 which lead from
which time vacuum is terminated in the punch
the bottom of the apertures I43 to the inner wall
and an air blast substituted to blow the foil wafer
of the turret. The knockout pin movement is
from the punch‘ and to seat it in the bottom of
actuated by the same means and is simultaneous
the cup. Simultaneously, vacuum is formed in‘
with the movement of the punches I10 which op
chamber I50 which lies directly beneath station B
20
erate at station B.
and which communicates with aperture I43 of
Thus, the machine, to the extent speci?cally
chuck I20 through aperture I44. Vacuum is fur
described above, comprises means for selecting
nished to chamber I50 through inlet I22 and said cups or similar articles from a mass thereof,
vacuum continues while the punch is withdrawn
means for orienting said cups in a position con
and until passage I44 of the turret chuck con-.
sistent with future work thereon, means for 25 taining the newly assembled cups is in communi
transferring the oriented cups to a work carrying
cation with chamber I5I, at which time vacuum
means, means for preparing and preliminarily
is terminated in chamber I50 preparatory to the
assembling with said cups a shape made of thin
next operation. The control of vacuum cycle in
material, means for completing the assembly and
vacuum shoe chamber I50 and punch chamber
means for delivering the assembled articles from 30' I13, as well as the control of the air blast in
the operation. All of said means act in the order
chamber I13, is by means of rotary valve M
named and automatically. In a mechanism of
which is constantly driven off shaft 36 (Fig. 4).
this character, where, as is the case in the par
During the passage of turret chuck I20 from sta
ticular example chosen, the ?nal assembly must
'_ tion B to station 0 and during operation at sta
be positive and without defect, it is important
tion C, the foil Wafer cut and seated in the cup
that the machine likewise inspect the assembled
at station B is ?rmly held in the bottom thereof,
items to reject those which are improperly as
?rst, by means of the vacuum in vacuum shoe
sembled. To that end an inspection unit, such
chamber I50 and later by means of the vacuum
as that indicated at 2|, to which the completed
in vacuum shoe chamber I5I which vacuum is
assemblies are delivered through transfer tubes
20 may be used. ‘ Such an inspection unit may
take several forms, and the type of said unit
forms no part of the present invention. A pre
ferred type of unit is that described and claimed
in my copending application, Serial No. 531,685,
?led April 18, 1944, which is a division of this
application.
‘
'
Summarizing the action of the machine with
reference to the passage therethrough of a sin
constant and'is furnished through port I24 (Fig.
13). The preliminarily assembled cup and foil
wafer having been carried to station C and hav
' ing cometo rest at that point, the hot punch
assembly I9'moves forward pressing hot punch
I9I ?rmly against a wafer I05 and adhesively
securing said wafer to the bottom of said cup
by means of the heat and pressure of the punch
and the adhesive coating on the foil. This op
eration being, complete, the hot punch assembly
gle cup, the cup 99 is fed into hopper portion 64 50 continues in the chuck to station D where, if it
and is gated into the hopper extension where it
does not fall by gravity into transfer tubes 20, it
is selected by a pin 11 traveling on pin ring 15.
is pushed from the chuck by the action of knock
From there it is led in the manner above de
out tubes 55. The ?nished assembly falls down
scribed to the point 85 (Fig. 8) where it falls
ward through transfer tubes 20 which deliver
endwise with its partially closed end forward into
either to a receptacle or, as herein speci?cally
terminus 06 and passes through transfer tube 4
shown, to an inspection unit 2I where, if desired,
to the turning mechanism 6 (Figs. 9 and 10)
the assembly may be inspected to determine
where it is contacted by a ?nger I01 and pushed
whether the sealing operation has been properly
into transfer chute 91 where it drops into chute
effected. This completes the operation.
ill)
chamber I I2 and is classi?ed by the ?ngers I I3
It will be apparent from theforegoing descrip
II3’ into one of the chutes whose termini are
tion ‘that the invention therein described and
represented at II4 (Fig. 17). At this point, a
hereafter claimed may be'embcdied in machines
chuck I20 on turret 8 having indexed at station
and methods for performing assembly operations
A, the transfer mechanism I0 is moved forwardly
65 other than those speci?cally described, and that
where transfer rod I23 contacts the semi-closed
the construction of the various parts may be
end I00 of the cup lying in chute terminus H4
widely varied without departing from the inven
and carries the cup through aperture IlII into
tion as de?ned in the appended claims.
cup-receiving aperture I43 of chuck I20. The
Having thus described my invention, what I
transfer mechanism I0 then moves backwardly
is:
,
leaving the cup positioned in the chuck aperture. 70 claim
r 1. In a machine for assembling, at a number
The turret 8 is now moved by the Geneva mech
of stations and in a sequence of steps, a. thin
anism until the turret chuck carrying said cup
shape in the perforate bottom of a cup-like arti
has indexed at station B it being understood that
cle, said machine including an article receiving
operations at stations A, B, C and D at turret 8
station, an assembly station and a uniting station
75
are simultaneously performed on the cups respec
2,405,074
13
14
at which the assembled parts are permanently
of stations and in a sequence of steps, a thin
joined, in combination, a work translating ‘device
positioned to successively present work to said
stations, apertures positioned in said device and
shape in the perforate bottom of a cup-like article,
said machine including an article receiving sta
adapted to receive the articles, means for seating
said articles in said apertures at the article re
ceiving station, means positioned at the assembly
station to seat the thin shape on the perforate
tion, an assembly station and a uniting station
at which the assembled parts are permanently
joined, in combination, a turret ring mounted
for rotation around a fixed point to deliver to said
stations work seated in apertures cut in the outer
bottom of said article, a vacuum chamber asso
surface of said ring, means located at the article
ciated ‘with’ said translating device and means 10 receiving station to seat said articles in said aper
connecting said apertures to said chamber to
tures, means located at the assembly station to
supply vacuum to said apertures during the move
seat said thin shapes on the bottom of said ar
ment of the work translating device from the as
ticles, means located at said uniting station to
sembly station to the uniting station whereby
the thin shape is maintained seated on the bot
tom of said article.
7
V
2. In a machine for assembling. at a ‘number
of stations and in a sequence of steps, a thin
permanently a?ix said shape to the bottom of the
15 article, ?xed means forming with the turret ring
a chamber at the assembly station, similar. ?xed
forming with the ring a vacuum chamber
coinciding with a substantial portion of the arc
shape in the perforate bottom of a cup-like arti
of travel of the turret between the assembly sta
cle, said machine including an article receiving 20 tion and the uniting Station and at the latter and
connecting means consisting of passages leading
station, an assembly station and a uniting sta
tion at which the assembled parts are perma
from the bottoms of the turret apertures to the
nently joined, in combination, a turret having on
inner surface of the turret to provide connections
its peripheral surface article receiving apertures,
between said apertures and said chambers at the
said turret being mounted to present the arti 25 assembly station and at the uniting station and
over a substantial portion of the travel of the
cles carried therein to various of said stations,
apertures therebetween.
a chamber, means for creating vacuum in said
6. In a machine for assembling, at a number
chamber, passages adapted to connect said cham
ber to said apertures when the apertures are pre
sented to the assembly station, to a subsequent
station and during travel therebetween, said pas
sages terminating in said apertures at positions
registering with the perforations in the bottom
of stations and in a sequence of steps, a‘ thin
shape in the perforate bottom of a cup-like article,
said machine including an article receiving sta
tion, an assembly station and a uniting station at
which the assembled parts are permanently
of an article seated in an aperture.
joined, in combination, a turret ring mounted for
3. In a machine for assembling, at a number 35 rotation around a ?xed point to deliver to said
stations work seated in apertures cut in the outer
of stations and in a sequence of steps, a thin
surface of said ring, means located at the article
shape in the perforate bottom of a cup-like ar
receiving station to seat said articles in said aper
ticle, said machine including an article receiving
tures, means located at the assembly station to
station, an assembly station and a uniting eta;
tion at which the assembled parts are perma~ 40 seat said thin shapes on the bottoms of said ar
ticles, means located at said uniting station to
nently joined, in combination, a turret ring
permanently ailix said shape to the bottom of
mounted to rotate about a fixed point and pre
the article, ?xed means forming with the turret
vided with article receiving apertures in its pe
ring a chamber at the assembly station, similar
ripheral surface, a ?xed shoe cooperating with
?xed means forming with the ring a vacuum
the inner surface of the turret ring to form a
chamber coinciding with a substantial portion
chamber, passages extending from the bottom of
of the arc of travel of the turret between the
the turret apertures through the inner surface of
assembly station and the uniting station and at
said ring and adapted to connect said apertures
the latter, connecting means consisting of pas
to said chamber as the apertures register with
sages leading from the bottoms of the turret
said chamber during rotation of said ring, and
apertures to the inner surface of the turret to
means for creating a vacuum in said chamber.
provide connections between said apertures and
4;. In a machine for assembling, at a number
said chambers at the assembly station and at the
of stations and in a sequence of steps, a thin
uniting station and over a substantial portion
shape‘in the perforate bottom of a cup-like ar
ticle, said machine including an article receiving 55 of the travel of the aperture therebetween, means
to maintain a constant vacuum in the second
station, an assembly station and. a uniting sta
named chamber and valvular means to intermit
tion at which the assembled parts are perma
tently maintain a vacuum in the ?rst named
nently joined, in combination, a turret ring
chamber at predetermined intervals.
mounted for rotation around a ?xed point to de
'7. In an assembly machine having a plurality
liver to said stations work seated in apertures 60
of work stations for assembling in a sequence of
cut in the outer surface of said ring, means 10steps a thin shape with a perforated cup-like
cated at
article receiving station to seat said
article, in combination, a work translating device
articles in said apertures, means located at the
adapted to receive said article at one station and
assembly station to seat said thin shapes on the
to thereafter present it to successive stations in
bottoms of said articles, means located at said
cluding an assembly station and a subsequent
uniting station to permanently af?x said shape
to the bottom of the article, ?xed means form
ing with the turret ring a chamber at the as
uniting station, means for seating said thin shape
over said perforation in said article at the as~
sembly station, and pneumatic means associated
sembly station and connecting means consist
with said translating device and adapted to cre
ing of passages extending from the bottom of 70 ate reduced pressure at the perforation in the
the turret apertures to the inner surface of the
cup-like article to maintain the shape and ar
turret ring to provide a connection between said
ticle in assembled relationship during transla
apertures and said chamber as the turret posi
tion of the assembled work from the assembly
tions the apertures at the assembly station.
station to the uniting station.
5. In a machine for assembling, at a number
8. In an assembly machine having a plurality
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