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Патент USA US2116906

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May 10, 1938.
s. s. MILLEN
2,116,906
BEADING MACHINE
Filed ‘Aug. 25, 1936
F/
4 Sheets-Sheet 1
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IIQIVENTOR.
5 fan fe?/Y?/e n
ATTORNEY.
May 10, 1938.
'
s. s. MILLEN
2,116,9Q6
BEADING MACHINE
Filed Aug. 25, 1936
4 Sheets-Sheet 2
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INVENTOR.
JfOH/Qy SN/?en
BY w ' -_‘
ATTORNE
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May 19*, 1938‘
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s. s. MILLEN -
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2,116,906
BEADING MACHINE
Filed Aug. 25, 1936
4 Sheets-Sheet 4
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ATTORNEY.
2,116,906
Patented May 10, 1938
UNITED STATES
FATENT OFFICE.
2,116,906
BEADING MACHINE
Stanley S. Millen, Glendale; Calif;
Application August 25, L936, Serial. No. 97,761
16 Claims.
The machine of this invention relates, as the
title indicates, to means» to form an annular
bead on articles of manufacture, such as'?nger
cots, toy balloons, and other devices made of thin
‘5; ‘rubber and having an open; end.
The‘ machine of this invention form‘sthe bead
ingv unit, or beading step, which, is- one of a
plural number‘ of steps» or stages in the manu:
facture of the above, referredto articles from the
10 raw material to the ?nished product.
The above referred to steps are set forth in
detail in. my co-pending application for, Letters
Patent, as ?led October 11,, 1935,. Serial; Number
44,555, entitled “Bead forming machines,” and for
15 that. reason the various steps involved in the
manufacture, will not be described, except in a
brief. historical manner, as follows.
In the manufacture of‘ devices of the charac
ter contemplated, mechanical forms are dipped
‘into a suitable solution of rubber, such as liquid
20 latex, and then Withdrawn to permit the forms
to.- dry. After the requisite thickness of rubber
has been- builded upon the‘forms by one or more
dippings, the forms are. moved, either singly or
in groups, or gangs, to the-machine which forms
2 Cl the subject matter of this invention. Here the
sides of. the open- end of- the article are rolled upon
themselves to form a bead of suitable thickness.
After beading, the forms together with the articles
formed and headed or ringed. thereon, aretaken
30 to a vulcanizing chamber wherein the article is
vulcanized. to render the rolled material in the
ring or bead into a solid mass and to cure or
strengthen the remainder of the article.
After vulcanizing, the article is removed from
35 its form and then is, assorted, tested‘ and pack
aged for the trade.
With the foregoing operations in mind as a
back-ground for the purpose of the present in
vention‘,
it may be said:
40
(.1). That it is a prime object of the present
invention to more e?iciently and more effectively
ring or bead articles of the. character contem
plated in groups or gangs, than has heretofore
been possible.
(‘2) An advantage of the invention resides. in
the possibility of massed; production of the arti~
cles contemplated, thus lowering the ultimate
50
economies may be observed from the accompany
ing drawings, the speci?cation and the appended
claims.
In the drawings of‘ which there are 4 sheets:
Figure 1 ispa sectional elevation showing one of ,5.
the bead‘ forming units and‘ the operating means
thereof.
Figure 2 is a plan View in section taken on line
2—2; Fig. 1'.
Figure 3' is a plan‘ view partially in section 10
taken on line 3—3,,Figure 1.
Figure 4 is a fragmental elevation taken on
line 4-4, Fig. 1.
Figure?is a sectional view taken on line 5—5,
Figure 1.
15
Figure 6 is, a diagrammatic view showing the
direction of movement of the bead forming con
tact points, the directions as shown by the arrows
being downward along the side of the form, out
wardly away from the form, upwardly through an
arc and thence inwardly to the point of begin- 20
ning..
Figure '7 is a plan view in section‘ taken on
line l--l, Fig. 1.
Figure 8 is, a plan view in section taken on
line 8-8, Fig. 1.
25
Figure 9‘ is; a side elevation of the machine
of this invention, certain of the elements of the
machine being; drawn in‘ a, disproportionate scale
to more clearly show the relation of the parts
thereof, reference being made to the cams.
Figure 110: is an end elevation taken on line
lll—l0', Figure 9, the above remarks as to scale
being true in this ?gure also.
.
Figure 11’ is a side elevation taken from the
opposite side of the machine shown in Figure 9,
remarks. as to scale,, made in the description of
Figure 9 are also true as to Figure 11.
Figure 12 is a plan view taken on‘ line l2'-l2,
Figure 11, the above remarks as to scale being 40
also true as to Figure 12.
more or- less.
All phases of the invention are
well illustrated by the number of units shown.
(3) A further advantage resides in the fact
that due to the limited number of moving parts
present in the machine of, this invention, the
cost of construction, maintenance and operation
body portion 22 within» which. a push» rod 24‘ is
journaled, the upper end, of the rod being
adapted to support a conical cam 26 while its
These and other features, advantages and
’
In the drawings the reference character 20. in
dicates one of the bead forming units, of which
there may be any' reasonable number, and while
the drawings show there to be 35 such units, 45
this number has only been used as indicative of
a plural number of such units. ‘There may be
cost to the consumer.
are reduced. to a minimum.
55
(01. 18-2)‘
Each of the units 2|] comprises a centraltubular 50
lower end rides upon a cam ,28 which is ?tted’)
upon and- rotates with a, cam shaft. 30.
55
2
2,116,906
As shown in the several ?gures of the drawings
38, I select cam shaft 3811 as a means to rotate
the unit 28 extends both above and below a table
32 which forms the base upon which all ma
chine elements operate. If reference is made to
Figure 1, it will be noted that the gear wheel 34,
a special cam 98, the rotation of which operates
auxiliary devices to operate the machine as a
which is positioned below the table 32, is pro
vided with what may be termed a hub 36 which
journals the body portion 36 and which is itself
journaled within a bearing 38 that is held to the
10 table by means of screws 48,
As shown in Figures 1 and 7, the body portion
22 is splined at 42 to receive a_ key 44 which is
formed as a part of the hub 36 so that the body
portion is held in ?xed rotational relation with
15 the gear 34, but is not prevented from recipro
. cable movement, as will be hereinafter disclosed.
The upper end of the body portion is provided
with a shoulder 46 upon which a spider 48 is
adapted to rest and which is held in position by
20 means of a nut 58 in threaded engagement with
the body portion 22.
As shown in Figures 1 and 8, the spider 48 is
provided with a plural number of prongs 52, each
of which is adapted to support a ?exible steel
25 ?nger 54, the upper extremity of which is pro
vided with a soft tip 68b of material such as rub
ber, cork, felt or any other suitable material which
would have a relatively high ‘co-efficient of fric
tion when brought into frictional contact with a
sheet of rubber 56, which has previously been
formed or deposited upon the form 58.
On each of the ?ngers I place rollers 68 which
are journaled in bearing brackets 62, which may
be riveted or spot welded to the ?ngers 64 as
35 convenience may dictate.
The lower end of the body portion 22 is ?anged
at 66a and is ?tted with a push-rod guide 64
which is held in position by means of screws 66’.
As shown in the several ?gures of the drawings
the guide 64 is provided With a circumferentially
extending ?ange 66 against which a cam 68, se
cured upon and driven by cam shaft 38, is adapted
to operate.
An extensile spring ‘I8 is ?tted around that
portion
of the body 22 which extends below the
45
wheel 34, and as shown, one end of the spring
abuts the wheel 34, while its other end rests
upon the ?ange ‘I2 as shown.
The lower extremity of the body portion 22 is
hollowed to receive a second extensile spring ‘I4
which extends around the push rod 24 and has
its one end abutting end wall ‘I6, while its other
end abuts or rests upon a washer 18, which is
held in position by a pin or key 88. The end face
of guide 64 is hollowed at 82 to receive a ?anged
55
head 84 formed upon the lower end of push rod
24, thereby forming a recess within which the
head 84 may recede when the rod 24 is thrust
upwardly by the action of cam 28.
At de?nite intervals during the machine op
eration it is necessary that all of the push rods
be simultaneously lifted, and to this end I have
Whole, as will be noted from time to time.
A bracket I82, secured to the table 32, is
adapted to journal a shaft I84, upon the end of
which I place a cam follower I86, having a pin
I88, which is adapted to follow cam groove III],
of cam 88, thereby swinging cam follower I86
through a given range of motion, which is of
course transmitted to shaft I84. The opposite
end of shaft I84, is provided with a lever II2
having a rod or shaft I I4, which is in direct con
nection with the bell cranks 94, by means of
pivots I I6.
15
It is necessary that all of the beading units
move in unison, and to effect such simultaneous
action I drive each of the cam shafts 38, by means
of worm gears I28, and I22. The gears I28,
being mounted upon cam shafts 38, while gears 20
I22, are mounted upon a countershaft I24, jour
naled in bearings I26, and which are driven
‘through or by speed reduction gears, grouped to
gether under the reference character I28, drive
chain I38, and motor I32.
the body portion 22 is splined to receive key 44
which is integral with the hub 36 of wheel 34,
and that insofar as rotation is concerned they are
joined. Figures 9 and 10 will show that each of 30
the gears 34, associated with the units 28 is in
train and that accordingly when one moves, they
all move in accordance with the motion of the
?rst driven gear.
Since it is necessary to rock or oscillate the 35
gears 34, I drive half gear I34 by means of a
pitman rod I36, which is in turn driven by means
of wrist-pin I38, gear I48 and the shaft I28a of
the principal gear I26b. Thus it will be seen
that as the pitman I36 reciprocates, the half gear 40
I34 will be rocked through a given range of
motion which is transmitted to all of the gears
34 in train. The full purpose of the above referred
to gear oscillation will be hereinafter disclosed.
Reference to Figures 9-10 and 11 will show that 45
the forms 58 are secured to form boards I42,
which are suspended upon rollers I44, which are
adapted to move Within the channel track I46
as the form board advances to operative position
indicated by the movable overhead I48.
Suitable transverse members I58 support the
track I46, while slotted guides I52 are also se
cured to members I58 for the purpose of guiding
the movable overhead I48 when it is raised or
lowered by means of hydraulic piston rod I54. _
The overhead I48 comprises the piston rod I54,
channel track sections M811, and a structure I48b
interposed between the piston rod I54 and the
track section I48a.
Figure 10 shows a hydraulic cylinder I56 with 60
in which hydraulic pressure is applied to a piston
(not shown) on piston rod, I54, causing the over
provided bars 86, having cam surfaces 88, and
head I48 to move in response to the direction of
which are ?tted between the inner faces of cams
?uid pressure, the control of which is determined
by the position of cam 88, cam follower I86,
65 28,'and 68, and which are adapted to rest upon
and move upon cam shaft 38.
As shown in Figure 11, the bars 86, are all
joined to a transversely extending bar 98, which
is connected to bell cranks 92, by means of
70 links 94.
The cam shafts 38, are journaled in bearings
96, and lie in parallel rows as shown in Figure» 11.
Each of the shafts 38 carry cams 28, and 68, of
which cam 28, is shown resting beneath the end
75 84, of the push rod. Of the several cam shafts
25
Previous reference was made to the fact that
shaft I84, lever I64, link I62, bell crank I68,
control rod I88, bell cranks I66 and I68, links
I18 and I12 and valve control arm I14,
Fluid under pressure may be admitted to cyl
inder I56 through pipe I16 and exhausted from 70
the cylinder through pipe I76a.
The source
of such hydraulic pressure as well as the point to
which exhausted ?uid is conducted forms no part
of this invention and for that reason is not shown.
The foregoing descriptive matter covers the 75
3
‘2,116,906
construction of the machine of this invention. I
will now describe theoperation of the same.
With the machine set up in operative position
as shown in Figure 9, it is only necessary to move
the form board I42 over rail section A to the
overhead structure I48. The motor I32 is started
by energizing circuit I80 by means of switch but
56 may be accomplished. Likewise after place
and I46 to reciprocate pitman rod I36 and oscil
ment of the work, the ?ngers are brought to nor
mal position for the duration of the beading op 10
eration, after which the ?ngers are again spaced
to permit removal of the work. To effect the last
in train with all of the gears 34, will cause all of
such gears to also oscillate. It will thus be seen
that oscillation of gears 34 causes the central
body sections 22 to also oscillate because of the
splined relation of section 22 and the hub 36
of gears 34.
It will also be noted that partial ro
tation of the body 22 carrying ?ngers 54, will
bring the tips 68b of the ?ngers into contact
with the entire circumferential surface of the form
58 and edge 60a. of the article on the form.
Concurrently with the oscillation of ?ngers 54,
chain I39, driving gear Islla, countershaft I24,
worm gears I22 and I25, effects rotation of cam
shafts 36, thereby rotating cams 28 and 68. As
shown in Figure l, cam 28 is set with a certain
lead over cam 68, so that push rod 24 is ?rst
raised, thereby causing the conical cam 26 to bear
against the rollers till, the effect of which is to
transmit pressure against ?ngers‘ 54, causing them
so
I42 and forms 58 so that the beading of the article
ton I82, thereby rotating gears I32a, I281), I280
10 lation of half gear I34 which by reason of being
a
given cam groove III], the overhead I48 is moved
upwardly more quickly than during the interval
that the bead is being formed.
The timing of the machine is such that the
?ngers 54 are spread to permit the downward
movement of piston I54, overhead I48 form boards
to move outwardly as indicated by dotted lines
54a in Figure 1.
As the ?ngers 54 are spread from contact with
the form 58 and article 56, cam 58 is brought into
position and bearing against ?ange 5*‘, causes
the body portion 22 to be raised, thus‘ moving the
?ngers 54, and contact points 661) upwardly as
indicated by the reference character 6 in Figure
6.
As the apex of cam 28 moves from under the
end of push rod 24, spring ‘I4 forces the rod down
mentioned operation, I provide slidable bars 86
having cam surfaces 88. The bars as previously
mentioned are connected to the transversely ex 15
tending bar 95 which is synchronously moved
forwardly and rearwardly by reason of the move
ment of lever II2, rod II4, bell ‘cranks 92 and
links 94.
‘
It should be borne in mind that all of the 20
previously described movements take place in
timed sequence. Some of the movements are
constant, while others, as in any automatic ma.
chine, take place at given intervals of time.
To recapitulate, the machine operation is as
follows.
(1) The ?ngers are spread to permit place
ment of the work.
(2) The forms are lowered to operating posi
tion.
30
‘
(3) The ?ngers move inwardly to contact the
work and are moved by cam action through a
pattern to form a bead as shown in Figure 6.
(4) Rotation of cams 28 and 68 is continuous.
(5) Oscillation of gears 35 is constant.
,
(6) Slide bars 85 are moved forwardly to spread
?ngers for the removal of the work.
,
(7) The forms are elevated to the point of be
ginning.
wardly to follow the cam, and simultaneously re
leases the pressure of cam 26 from rollers 60 and
?ngers 54 so that the tips or contacts 50b move
inwardly as indicated by f in Figure 6. As the
apex of cam 58 moves from under ?ange 55,
After the forrns are returned to the point of 40
beginning, they are moved outwardly over rail
section B, while new work is brought forward over
rail A, from which point the previously described
spring ‘Ill pushing‘ against ?ange ‘I2 causes the
body portion 22 to move downwardly as indicated
by g in Figure 6.
It should be borne in mind that the form 58 is
of slightly greater diameter than the normal
it will be apparent that I have developed a new
method of beading articles of the character de
dimension across opposing tips Bill)‘ on the ?ngers
54. Thus ?ngers 54 are always bearing against
the forms 58 thus accounting for the straight line
indicated by g‘ in Figure 6.
of output.
Further rotation of cam 98 causes cam fol
lower I05 to effect movement of shaft "34 which
through lever H54, link I62 and bell crank I60
'actuates control rod I05 to throw bell crank I56,
link I'Iil, bell crank I68 and link I12 to throw
valve arm I12 and valve I'I‘Za to admit ?uid pres
v60 sure to enter cylinder I56 through pipe I16 thereby
forcing piston rod I54 to lower the overhead I48.
During this interval ?uid is being exhausted
through pipe Il?a following its previous admis
sion for the purpose of lifting the overhead I48.
It is necessary in order to form a bead on
rticle 56, that after the form has been moved to
its lowermost operating position, that the over
head I48 and all of the forms 58 be withdrawn
through and against the pulling action of ?ngers
70 54, for as the article is withdrawn its edge ma
terial as shown at 53a will be rolled into a bead.
After a suflicient amount of bead has been
formed from the wall material of the article, cam
28 again causes the ?ngers to be spaced from
75 the form and article, and due to con?guration
cycle of operation begins over again.
From a. study of the machine herein set forth,
scribed, wherein simplicity of necessary mechani
cal structure is an outstanding feature when
taken together and in view of permissible volume
‘
While I have described the preferred form of
my invention, I do not wish to be limited to the
speci?c showing herein made but do claim as a
part of this invention, all such near resemblance,
principle and mode of operation as clearly falls
within the scope of the present invention.
I claim:
1. In a bead forming machine of the character 60
described, a supporting structure, means on said
structure operably supporting a plural number
of ?ngers having pads on the ends thereof,
means to cause said ?nger-pads to alternately
engage and then release one end of an. article 65
to be headed, and means to retract said article
during the formation of a bead thereon.
2. In a bead forming machine of the character
described, a supporting structure, means on said
structure operably supporting a plural number
of ?ngers having pads adapted to engage an
article to be beaded, means to spread said ?ngers
prior to contacting said article, means to cause
said ?ngers to move parallel with said article and
in contact therewith prior to returning to the r
2,116,906
point of beginning, and means to retract said
article during beading.
3. In a bead forming machine of the character
described, a supporting structure, means on said
structure operably supporting a plural number
of ?ngers having pads adapted to engage an
article to be beaded, means to spread said ?ngers
prior to engaging said article, means to cause
said ?ngers to‘ move parallel with said article and
article during beading, means to reciprocate said
?ngers divergently upward in clearance of said
article and said form, and then downwardly in
contact with said article and said form, means
continuously operating to oscillate said ?ngers,
means to retract said article and said form, and
means operating in timed sequence to spread said
?ngers irrespective of the means to reciprocate
said ?ngers.
9. In a bead forming machine of the character 10
in contact therewith prior to returning to the
point of beginning, means to oscillate said ?ngers,
described, a supporting structure, means on said
and means to retract said article. -
structure operably supporting a plural number
4. In a bead forming machine of the character
described, a supporting structure, means on said
of cam pressed ?ngers adapted to form a bead
on an article to be beaded, a form to support said
structure operably supporting a plural number of
?ngers having pads adapted to engage an article
to be beaded, means to spread said ?ngers prior
to engaging said article, means to cause said ?n
article during beading, means to reciprocate said 15
?ngers divergently upward in clearance of said
article and said form, and then downwardly in
gers to move parallel with said article and in
20 contact therewith prior to being spread, means to
oscillate said ?ngers concurrently with engaging
and releasing said article, and means to retract
said article.
5. In a bead forming machine of the character
25 described, a supporting structure, means on said
structure operably supporting a plural number of
deformable ?ngers having pads adapted to en
gage an article to be beaded, a form to support
said article, pressure means to deform said ?ngers
.30 in clearance of said article, means to move said
?ngers upwardly, said pressure means being re
tractable, said ?ngers being reformable to con
tact said article and said form after retraction
of said pressure means, means to move said ?n
35 gers downwardly in contact with said article and
form, means to oscillate said ?ngers concur
contact with said article and said form, contin
uously operating means to oscillate said ?ngers,
means operating in timed sequence to spread said 20
?ngers irrespective of the means to reciprocate
said ?ngers, and means to place and withdraw
said article and said form.
10. The combination with a mechanical form
to support a thin rubber article during forma 25
tion of an annular bead on said article, of means
to form said bead, said means comprising a plu
ral number of ?ngers adapted to be moved di
vergently, means to move said ?ngers divergent
ly, means to raise said ?ngers in clearance of
said article and said form, means to move said
a0,
?ngers downwardly in contact with said article
and said form, means to continuously effect said
movements, means to oscillate said ?ngers, and
means to retract said form and said article.
35
11. In a machine adapted to bead thin rubber
rently with being moved upwardly and diver
articles,‘a beading unit, said unit including a
gently in clearance of said article and form and
contacting said article and its form, and means
to concurrently retract said article and form.
6. In a machine of the character described, a
heading unit, means to operably support said unit,
deformable ?ngers in said unit, said ?ngers hav
ing pads adapted to engage an article to be
central body, a spider affixed to said body, ?exi
ble ?ngers having friction pads thereon and
beaded, a_ form to support said article, pressure
means to deform said ?ngers in clearance of said
article and form, means to move said ?ngers up
wardly, said pressure means being retractable,
said ?ngers being reforniable to contact said ar
ticle and form after retraction of said pressure
means, means to move said ?ngers downwardly
in contact with said article and form, means to
oscillate said ?ngers concurrently with being
moved upwardly in clearance of said article and
55 form and being moved downwardly in contact
with said article and form, and means to retract
said article and form.
'7. In a bead forming machine of the character
described, a supporting structure, means on said
60 structure operably supporting a plural number
of resilient deformable ?ngers having pads
adapted to form a bead on an article to be beaded,
a form to support said article, means to deform
said ?ngers, means to lift said ?ngers after be
65 ing deformed, said deformable ?ngers being re
formable after being lifted, means to force said
?ngers downwardly in contact with said article
and said form, said lifting means and said de
forming means being continuously operable, and
70 means to retract said article and said form.
8. In a bead forming machine of the character
described, a supporting structure, means on said
structure operably supporting a plural number
of cam pressed ?ngers adapted to form a head
75 on an article to be beaded, a form to support said
extending substantially parallel with the verti
cal axis of said body, said ?ngers being secured
40
to said spider, means to oscillate said body, con
currently operating means to raise and lower
said body, retractable means to ?ex said ?ngers
whereby they may spread in clearance of said
article, said ?ngers being adapted to re?ex to
cause said pads to contact said article and said
form when said means to ?ex said ?ngers has
been retracted, said retractable means operating
in advance of the means to raise and lower said
body.
12. In a machine adapted to bead thin rubber
articles, a beading unit, said unit including a
central body, a spider affixed to said body, ?exi
ble ?ngers having friction pads thereon, and
extending substantially parallel with the ver
tical axis of said body, said ?ngers being secured
to said spider, means to oscillate said body, con
currently operating means to raise and lower
said body, retractable means to ?ex said ?ngers 60,
whereby they may spread in clearance of said
article said ?ngers being adapted to re?ex to
cause said pads to contact said article when said
means to ?ex said ?ngers has been retracted, said
retractable means being designed to operate in
advance of the means to raise and lower said
body, the means to lower said body comprising a
spring.
13. In a machine adapted to form a bead on
thin rubber articles on forms, a reciprocable 70
body, a spider on said body, ?ngers on said
spider and extending substantially parallel with
the sides of said form, said ?ngers having fric
tion pads at their upper extremity, retractable
means to move said ?ngers divergently, means 75
5
2,1 16,906
mit said ?ngers to contact said article and form,
means to force said ?ngers downwardly in con
tact with said article and said form, and. means
whereby said ?ngers are released to re?ex to
contact said article and said form, a gear in
splined relation to said body, means to oscillate
said gear and said body, a second cam, said sec
ond cam being adapted to lift said body, a spring
to retract said article and said form.
_
14. In a machine to form a bead on a thin
to cause said body to follow said second men
tioned cam, said ?rst mentioned cam being op
to move said body and said ?ngers upwardly,
means to retract said retractable means to per
rubber article, a beading unit, said unit having
a body portion, ?exible ?ngers extending sub
10 stantially parallel with the medial vertical axis
of said body, friction pads on said ?ngers, a re
ciprocable ‘shaft within said body, means on
the upper extremity of said reciprocable shaft to
intermittently and forcibly flex said ?ngers out
15 wardly under tension in clearance of said arti
cle, whereby said ?ngers may subsequently re~
?ex under tension to contact one end of said ar
ticle, a cam to lift said shaft and the ?nger
erated with lead
their being lifted
means operating
shaft and spread
to spread said ?ngers prior to
by said second mentioned cam,
in timed sequence to lift said 10
said ?ngers irrespective of said
?rst mentioned cam, an elevator to raise and
lower groups of forms and articles for beading,
and cam controlled differential speeds to raise
and lower the forms and articles on said elevator, 15
all of said elements being operated in timed se
quence.
16. The combination in a machine to form an
pressing means on said shaft, a spring to cause , annular ring on thin rubber articles supported
20 said shaft to follow said cam, a_ gear in splined‘
relation to said body, means to oscillate said
gear and said body, a second cam, said second
cam being adapted to lift said body, a second
spring, said second spring being adapted to cause
said body to follow said second cam, said ?rst
mentioned cam being operable with lead to ?ex
said ?ngers prior to their being lifted by said
second mentioned cam.
~
15. In a machine to form beads on thin rubber
30 articles supported upon forms, beading units,
said units having a body portion, resilient ?n
gers extending substantially parallel with the
medial vertical axis of said body, friction-pads
on said ?ngers, a reciprocable shaft within said
body, a cam to lift said shaft, means on the up
per extremity of said shaft to forcibly press out
ward against the inner sides of said ?ngers to
flex the same under tension in clearance of said
article and said form, a spring to force said shaft
40 and said pressing means to follow said cam,
upon forms by downwardly stroking the periph 20
eral edge of the open end of said articles, of
means to form said annular ring, said means com
prising a plurality of resilient ?ngers secured to
a spider oscillatable with a body structure adapt
ed to support said ?ngers and extending sub 25
stantially parallel with the medial vertical axis
of said forms, means to ?ex said ?ngers laterally,
in clearance of said articles and said forms,
means to elevate said ?ngers, means to lower
said ?ngers, said ?exing means being retractable, 30
said ?ngers being refiexible upon retraction of
said ?exing means whereby said ?ngers may
contact said forms and said articles, means on
said ?ngers to drag a portion of said articles
downwardly upon themselves when said ?ngers 35
are lowered, means to concurrently oscillate said
?ngers, and means to concurrently retract said
articles and said forms.
STANLEY S. MILLEN.
40
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