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Патент USA US2403644

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y July 9, l946.~
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MACHINE FOR FORMING PLASTIC B_*IN‘DEÈRS-
Filed Jan. 2. 1943l '
2,403,644
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July 9, 1946.
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c. È. ÉMME'R `
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'2,403,644
MACHINE Fon FORMING PLASTIC BINDERS
_Film1 Jan. 2,_ 1943
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2,403,644
Patented July 9, 1946
UNiTED STATES IPA;"fr/.F.èlrr OFFICE’
MACHINEFORFORMING PLASTIC EINDE-RS
Charles >Edward Emmer, Chicago, Ill., assigner to
General Binding Corporation, Chicago, Ill., a
corporation of Illinois
Application January 2, 1943, Serial Neo.v 471,174
(01; L12x-_19)
16 Claims. v
1
.
Y .forming of the article blank as sections thereof
This invention relates to an apparatus for >more
efficiently manufacturing curled articles from
vare subjected 4to heated and >cooled instrumen
synthetic plastic materials.v
talities.
It is furthermore an object of this invention to
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The present invention, more specifically, per
tains to a machine for quickly and .efliciently pro
vprovide a manually operable machine for facili
tating the >carrying out of an improved Iplastic ar
ducing a binder or a curled article from thermo
ticle producing method in a manner well adapted
.to meet modern quantity production require
' plastic’ material, such asY Celluloid, pyroxylin,
“Vìnylite,” “Ethocel”, and other modern- plas
tics, and more particularly to such a machine .as
ments.
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,
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may vbe used for forming a comb-shaped -or 10 Itis an important object of this invention to
provide simple and effective means for accurate
branched lblank into a binder or Vthe. like, by ad
ly feeding and preheating preformed selectively
vancing the lblank on a carrier .between forming
shaped `synthetic blanks to have advance por
elements one of which vis carried on and rotated '
tions of »the blanks subjected lto a hot treatment
by the carrier while another coacting element
while thek trailingportions of. the blanks remain
timed to operate with the carrier, subjects the
only preheated as the treated 'blanks are being
advancing blank to preheated and hot treatments
as the blank is curled .into a. predetermined forrm.
curled and shaped.
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_
Other and further important objects of the in.
vention will be apparent .from the disclosures in
The thermoplastic material from'which selected
shaped article forming blanks are stamped or cut,
is such that it becomes lplastic when heated, to
permit the same to be formed into Ya'predeter
mined shape and permits such shape to` be re
tained when the shaped blank cools andsets.
It is an yobject of this invention to provide an
Ythe specification and the accompanying drawings.
In the drawings:
'
Figure lis a fragmentary plan viewof one se
lected design -ota preformed blank of plastic
material from which a binder is formed in a form
apparatus for treating and shaping synthetic .25 ing machine embodying :the principles of this in
thermoplastic material into a useful article of a '
given configuration.
l
the formed binder .resulting lfrom the shaping of
Another object of this invention is to provide an
apparatus with an improved combination heated
ythe selected design of blank shown in Figure 1.
and cooled element for use in the fabrication -of ..30
plastic articles.
vention. ».
Figure .2 is a .fragmentary elevational view of
.
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Still another object ofthe invention .is to soin
terrelate feeding and heating instrumentalities
of a machine for vfabricating plastic articles from
synthetic sheet materiaLthat said instrumentali
ties will operate in proper timed sequence Vtoeffect
>the desired shaping and forming of the desired
Figure 3 is a transverse sectional view of the
binder taken. on line IDI-III of Figure A2.
Figure 4 is a side elevation-al view of the `binder
making machineof this invention with Ythe binder
forming arbor cradled in the feed belt in blank
235 .receiving position.
Figure 5 is afragmentary top plan view of the
machine.
Figure V6 is a vertical sectional view taken on
line
of Figure 5 showing the retracted
Itis 'a further object of the invention to provide
a machine ywherein preformed synthetic mate .40 normal position of the feed .belt and 'arbor
-cradli-ng control in dotted lines.
rial blanks are advanced and coiled `by a carrier
As _shown in the drawings:
as the blanks are first preheated and are jthen sec
The machine shown in the drawings is of the
tionally subjected to hot and warm treatments
hand> oper-ated type, but maybe mechanically op
by mechanisms timed to coact and operate with
45 erated if desired. -The machine is designed >to
the carrier.
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take a preformed blank, design-ated as a whole
Another'obj ect of this invention is to provide a
machine for curling: and -forming synthetic arti- Y by the reference numeral I, and made of Celluloid
articles.
f
,
lcles of different sizes, without requiring any ap
.or other thermoplastic material and shaped as
preciable amount of Work otherthan the substi
@illustrated in Figure -1, and to form said blank
tution of different sized freely .replaceable form
50 into a substantially tubular or curled »shape as
’ shown inrFigure 2. The blank `I is preformed by
cutting or stamping the >same from a 'strip of
ing elements.
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.
kStill another object of the invention is to pro
vcelluloid »or .other thermoplastic sheet material.
The -blank I is comb-shaped and comprises a
cradle and >rotate an element for the shaping and 155 >back orspine 2 having aplurality‘ of spaced par
vide van article making vmachine wherein a ñex- -
ible vcarrier for advancing .a blank .is operable to
2,403,644
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4
allel fingers or ribs 3 extending Iperpendicularly
to one longitudinal edge of the back or spine 2.
In the completed forni of the binder shown in
journal block 25 (Fig. 4) which is slidably dis
posed in a guide slot 25 formed in a supporting
head 2l which is integrally formed at the sup
ported end of a lever 23. Each lever adjusting
screw 28 is adjustably threaded through the
lever supporting head 21 and through the journal
Figure 2, the back extends longitudinally of and
overlaps the ends of the fingers 3 which have been
curled into rings 4 and which may be substan
block 25 as Well as diametrically through the lever
` tially circular or have some other rspecial shape.
Referring now to Figures 4 to 6, inclusive, the
hand operated machine for making the binders
comprises a pair of spaced side frames 5 which
are joined together by suitable tie-bolts 6. The
side frames 5 are adapted to be mounted on a
-supporting stud 24. This arrangement permits
the levers 23 to be adjusted for varying the ef
fective lengths of the swinging levers 23, thereby
w affording
an arrangement for the accommodation
of ldilîerent lsized binder forming arbors. Each
.
of the, control levers 23 is provided with an ex
suitable support or base having a trough for re
ceiving the belly or sagging bottom portion of
‘ -tension arm 29 which carries a handle 30.
a belt hereinafter referred tof The front ends
_Seated transversely upon the horizontal por
of the side frames 5 are provided with integral
inclined arms or brackets 'I~provided-w-ith guide
tion of the endless Ibelt or apron I4 near the in
ner end of the supporting table I5 is a free or
slots 8 in each of which a slidable bearingblock 9_
floatingy cylindrical forming arbor 3I the ends of
which project beyond the sides of the belt or
is engaged. An adjusting screw Il) is threaded
,through an end member of a frame arm -I and 20 apron I4. One end ofthe forming arbor 3I is
provided withy a knurled headl or handle 32 per
has threaded engagement with the bearing 4block
mitting convenient removal of the arbor 3I from
r9. A control spring II is engaged around each
the belt after a binder forming operation of the
of the adjusting screws I0 within the slots Y8 as
shown in Figure 4.
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machineA to permit removal of a curled article
-‘Disposed between'the frame arms 1 is a pres
25
from the arbor.
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sure roher I2 having supporting stems which are
vIn the normal or released position of the con
rjournaled in theslide blocks 9. Coacting with
rthepressure roller I2 is a belt or apron guide
trol levers 23, as indicated in dotted lines in Fig
roller I3 over which a blank carrying and feed
belt or apron I4 is engaged. The belt or apron '
from the raised position of the control roller 22
`I4 is formed of'cloth‘or other'suitable `material
then extends horizontally over the supporting
table I5. To normally p_osition the binder form
ing arbor SI-ready for a binder forming opera
tion, the control levers 23 are adapted to be man
kand is of endless construction as clearly illus
trated in’Figure 4. The belt `is positioned be
' tween the machine side `frames 5j over the guide
ure 6, the endless belt f I4 extends downwardly
and’passes underneath the forming arbor 3l and
froller I3> and passes'rorwardly- into the machine 35 ually swung downwardly from the dotted line
over a supporting table or top I5 having side
flanges, I6 which project downwardly on the in
-ner sides of the upper-margins of the side frames
position of Figure 6 into the full line position,
thereby causing a portion of the belt to loop
around the major portion of the forming arbor to
form a retaining pocket or cradle for the arbor.
'5 andy are secured thereto by bolts I'I. The top
In the cradled position of the' arbor 3l as indi
'surface of the table is thus positioned'flush with 40
cated in full lines in Figure 6, the arbor is swung
the upper edges of the side frames 5, thereby per
into pressing relationship with the control roller
fmitting the continuous belt 4to ride over the table
22 and is also positioned directly above a combi
"in a plane above the top edges of the side frames.
The belt or apron I4 extends downwardly over
nation heated and cooled blank treating element
'the guide roller I3 and hangs or sags between 45 or mandrelwhich is of cylindrical form and of a
diameter materially larger than the diameter of
„the side~ frames 5 with the lower belly portion of
¿the belt projecting down into the trough provided
Ain the support on which the side frames
are
mounted. At the rear portion of the machine the
endless beltl or apron extends upwardly to passif
around one side of a guide roller I8 the reduced
the varbor 3I with which the cylindrical mandrel
is positioned to coact. The combination heated
and cooled element or mandrel is positioned
transversely between the machine side frames 5
and is provided with axial shaft portions which
are journaled in suitable bearing openings pro
vided in the machine side frames. One of the
mandrel shaft portions is indicated by the refer
Iends of which are journaledrin suitable bearing
openings provided in the side frames 5. The end
less belt I4 continues upwardly _at the rear end
of the machine and passes over a driving roller 55 ence numeral 32 and is provided with an axial
passage leading into an inner heating chamber
I9 the reduced ends-of which‘are journaled~ in
suitable journal openings provided in'upwardly
33 to `permit steamer any other suitable heating
extending 'rear arms or brackets 20 which are
medium to enter the chamber 33 from a supply
tube or pipe 34 which has one end connected to a
integrally formed on the upper rear portions of
VVthe side frames 5.' Also rotatably mounted be 60 heating source and the other end projecting into
the mandrel shaft 32.
tween the upper 'ends _ of the ` frame arms or
The vimproved combination hot and cold
brackets 2li above the driving roller I9 is a pres
mandrel consists of a heating segment 35 con
sure roller 2| Vthe reduced ends Aof which are
taining the heating chamber 33 and -a smaller
mounted in slidable bearing blocks forming part
of »roller adjusting means similar to the roller ad 65 air-cooled or unheated 'segment' 36. The
justing means described in connection .with the
segment 3B is'p'referably formed of steel and is
`in the`> shape of a cylindrical segment and is
Vpressure roller I2.¿ The continuous belt or apron
provided with a plurality of parallel Ventilating
I4 passes over the driving roller andl beneath the
vor cooling passagesY or slots 31. The segment 35
pressure roller 2I and then passes downwardly t
may become slightly preheated by the heat from
rengage around a belt control roller 22.` Y
Y
The reduced supporting ends of the control
the h_ot segment 35 but the effect of the air
'passages 3'I tends ¿to reduce the temperature 0f
-roller 22` are rotatably vjournaled in a pair of
levers 23 which are journaled on stud 24. >The
thesegmentï36 so that the same may serve as a
meansv for cooling or maintaining'the trailing
~studï24 foreach o’f'themleve'rs 23 is rotatably
-supported in aside frame'5 and projects‘into a' 75 portion of a blank `at its preheated temperature
andere
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-t'rolrroller 22 to move into its lowermost position',
during- an article forming operation. The'major
portion of the-hot and cold Vcylinder or mandrel
which is determined by vmeans of sto-p fingers orV
lugs' 50 which are integrally formed on the outer -
is preferably constructed of brass or copper and
side _surfaces ofthe side frames 5 as shown in Fig
uref4. AWhen the control levers 23 are swung into
comprises Athe cylindrical segment 35 which
includes the heating chamber 33 and is rigidly
the- lower positions the'belt I4 is caused tofloop
or integrally joined' with Vthe minor cylindrical1
around the forming arbor 3|V to form a pocket or
segment 35y to form a cylindrical element.
cradle for the arbor and to'properlywtension the
The combination heated and air-cooled sec
section of the endless belt or apron around said
tional element or mandrel is positioned to permit
the apron or belt I4 to pass over the cylindrical y10 arbor and move the arbor 3| into pressing rela-tionship> with the roller 22, ready for a binder
surface thereof between the mandrelv and the
forming arbor when the mandrel is rotated to
forming operation.
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To vform a `tubular type of plastic binder from
one of the thermoplastic forms or> blanks I, "a
cause proper conditioning of a binder forming
blank during the shaping of the same.
For the purpose of causing rotation of the 15 blank is laid upon the top horizontal portionf'oî
the belt I4 above the table -I5 in-a transverse
Vposition as illustrated `in- Figure 5,'Y withthe
shaft portion 32 has a sprocket 38 secured
fingers or ribsV 3 of the blank projectingftoward
thereon. Engaged over the sprocket 38 is a
the forming arbor 3I and with the back or' spine 2
driving chain 39 which extends downwardly and
is engaged around a small driving sprocket 40 20 of the blank disposed transversely of the belt
with the lfree longitudinal edge of the blankback
which is keyed or otherwise secured on a rota
or spine 2 in contact with the frontl edge 0f a
table stub shaft 4I which is journaled in a
blank positioning follower or stop-bar 5I. -«The
suitable bearing provided in one of the side
follower 5I is seated upon the top surface of lthe
frames 5. Also secured on the mandrel shaft 32
to -the inside of the sprocket 38 is an inner 25 horizontal section ofthe apron I4 and is provided
with downwardly- projecting end vflanges 52
sprocket of the same size «as the sprocket 38 and
which project downwardly tothe Aoutside -of the
around which a drive transmitting chain 42 is
upper marginal side surfaces of ther two machine
engaged. The-chain 42 extends diagonally up
heated and air-cooled combination mandrel, the
wardly and'engages around'an upper sprocket 43
side frames 5 to serve as guides when the -bla'nk
positioned to' be removably engaged to Project
the machine manually engages vthe handlesí‘53
apertures 48 provided »in an arc-shaped bar 49
bar forwardly over the machin'eázth‘er'ebypushing
the blank and moving the front' or'outer Iends
which is secured onr the` shaft section 44 of the 30 positioning follower or stop-bar 5I' is moved
forwardly or rearwardly on the» machine' by
driving roller I9.
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.
means ~of a pair of knobs or handles'r53 or when
For the purpose of operating the driving chains
the follower is carried along by the advancing
39 and 42 to transmit -a drive to the hot and
belt to serve as a stop for a ‘blank‘ as” it is
cold mandrel and to the driving roller I9, a crank
»
handle 45 is secured on the stub shaft 4I. The la5 yadvanced vtoward the arbor 3|.
With a plastic blank I positioned upon the. top
crank handle 45 is provided with a spring con
of the feed apron I4 above the table I5', inthe
trolled knob or head 4.6 and> includes a shiftable
position iuustrated in Figure 4; the operator>- of
pin or stem 41 the inner end of which is
into any selected one of a plurality of receiving 40 of the 'blank positioning bar 5I’ andy pushes' the
which is secured on the outer face of the lower
corner portion of the machine side frame 5 on
ofthe blank fingers or ribs ilV below the belt con;
- trol roller Z2 into the position shown in full ‘lines
which the sprocket supporting stub shaft 4I is
mounted, as clearly illustrated in Figure 4.
The apertured segment shaped bar 49 .is pro'
videdfor `the purpose ofnormally setting the
position of the heated and air-cooled mandrel vto
have the heated and cooled segments of the
mandrel properly positioned to coact with
different portions of blanks while being formed
and for positioning the mandrel Awhen different
sized forming arbors `are’fused in the machine for
the purpose of producing- binders of different
in Figure 4.
The advance of the blank lby the
~ operation' of the crank arm 45 then moves the
ends of the blank'ñngers’ß into engagementiwith
thev lower- portion of the forming'arborl'3-I and
labove the cylindricalsegment 35 of. the mandrel.
tó
The blankv as it isV advanced into forming 'position
becomes slightly preheated and is' thusk condi'
tioned and positioned ready to have Vthe blank
»fingers or ribs 3 heated to a desired temperature
in order to make the` lingers or ribs plastic Vto
When a diñerentV sized binder is to be
e facilitate curling and forming.y For the purpose
produced the control levers 23 have the pivotal
supporting points thereof adjusted'by means of
the adjusting screws 28 for varying the effective
pulled outwardly to release the stem 41 from a
sizes.
of >curling the blankthe ’crank arm knobï46'is
selected aperture of the bar 49, thereby permit
ting the crank arm 45 vto be Ámanually rotated a
lengths of saidl levers for the accommodation of l
co number of revolutions, determined bythe ratio
a selected size of forming arbor 3l.
In the operation of _the machine, the forming
arbor 3l rests transversely on the belt I4 above
the combination heated and air-cooled mandrel,l
the heated and cooled segments of which are
of the sizes of the driving sprocket V48 with rel
positioned as illustrated in Figure 6 for a par
ticular size of arbor. ~ Said mandrel is held in
dre1.shaft,'so that the hot segment 35 of the
mandrel is brought into contact with the ylower
surface of the horizontal' portion of the belt .I4
directly below the fingers or ribs v3 of the blank
such position by the crank arm 45 'which has
the crank arm control pin or stem 41 engaged in
a selected one of the openings 48 of the bar »49. .
spect to the driven sprocket 38. TheÍrotation of .
theV driving sprocket 40 operates the `'chain 39
and thereby rotates the sprocket 38' on theman
to further heat the same as they are advanced
For the purpose of'holding the forming arbor in
into the -ñeld of operation of the formingarbor
position above the sectional heated and cooled
3|',
which is caused to rotate by the movement
mandrel, for a binder forming operation, the
of `the belt> which is operated by `means ofthe
control levers 23 are Vmanually swung from the
dotted line position of Figure 6 into the full line y75 `driving roller >I9 and receives its'drîve from the
position ¿of Figure 6, thereby causing the beltoon
chain v42 «which is simultaneously ¿operatedëwith
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the chain 9, due to the operation of the crank
and cross section has been illustrated and'de
handle 45.
As the forming arbor 3| is rotated and pressed
scribed for use in connection with the improved
binder forming machine, herein disclosed, it will
toward the roller 22 by the looped portion of the
of course be understood' that forming arbors of
belt as the belt is advanced the heated blank
diiferent'sizes and-shapes may be used to provide
binders of desired shapes and sizes.
'
fingers or ribs are softened and caused to curl
around the forming arbor between the arbor and
It will of course be understood that various
the belt to form the binder rings 4. As the heated
details of construction may be varied through a
wide range without departing from the principles
fingers of the blank are being formed into the
binder rings 4, the back or spine 2 of the blank 10 of this- invention, and it is, therefore, not the
is advanced by the belt into the ñeld of opera
purpose to limit the patent granted hereon, other
tion of the air-cooled segment 36 of the mandrel
wise than necessitated by the scope of the ap
pended claims.
which at this stage of the operation is rotated
into position to engagebeneath the `apron and
I claim as my invention:
,
1. In an apparatus for forming coiled plastic
below the blank back or spine 2 to allow that por
tionY of the blank to remain only at its preheated
articles, which apparatus includes a support for
temperature as it passes between the forming
a plastic element to be coiled, a rotatable heated
arbor and the mandrel to be slightly curled and
and air vented presser element below the sup
positioned to overlap the ends of the binder rings
port, and operating means for the support and
4 to complete the curling or forming of the blank
said element for moving the support relative to
to produce a plastic binder.
the rotatable presser element, to move the plas
During> the forming of a binder the forming
tic element over said heated and air vented
presser.
arbor ‘,3I, due to the weight of the belt control
roller 22 and the levers 23, causes tensioning of
2. In an apparatus for forming coiled plastic
the belt around the arbor so that the arbor ex 25 binders, which apparatus includes a movable end
erts a downward pressure toward the heated
less support for a plastic element'to be coiled,
and _air-cooled mandrel to cause pressing of the
a rotatable combination heated and air cooled
blank between the pressure mandrel and the
element below the support, a former carried by
forming arbor as the blank is being formed,
the support, and means for operating the heated
By the time the lingers of the blank are curled 30 and air cooled element and saidsupport to cause
around the forming arbor and the back or spine
operation of the former by the support and move
portion 2 of the blank has been subjected to the
ment of the plastic >element over the rotatable
effects of the air-cooled segment 36 of the man
heated and air cooled element and around the
drel, the binder rings 4 cool sufficiently to set and
former to coil the plastic element into a binder.
lose their plasticity but retain their curled flexible 35
3. In an apparatus for forming coiled plastic
shape necessary to form flexible rings for the
articles, which apparatus includes a movable end
finished binder.
less support for carrying a plastic element to be
When the binder is completely formed the ma-l
coiled, a Vheated segmental element having cool
chine ls stopped with the back or spine portion 2
ing' vents> in one segment thereof, said segmental
thereof being positioned to rest above the air 40 element disposed below the support, a forming
cooled mandrel segment 36, so as to avoiddefor
>mation or over heating of the formed binder ele
ment, that would be caused if the formed ele
ment came to rest on the heated segment 35 of
45
the mandrel.
means resting on the support, a pivoted control
means operable for cradling the forming means in
the support, and means for rotating the heated
element and moving said support to advance the
plastic element ' for compression between the
To remove the binder carrying arbor from the
machine it is only necessary to manually swing
the control levers 23, by means of the handles 30,
from the full line position of Figure 6 back into
forming means and the heated element and also
cause rotation of the forming means by the sup
port to coil the heated plastic element around
the forming means to form a plastic article.
they normal dotted line position, thereby causing 50 4. In a machine for forming coiled plastic
the loop portion of the apron to be unwrapped
binders, saidV machine including a support for
from the arbor to release the same. The released
supporting and’advancing a plastic element to
arbor 3l may now be removed from the machine
be coiled, a forming means on said support, a
by means of _the knurled handle 32, and the com
combination heated and ,cooled presser element
pleted cooled binder formed on the arbor may 55 below the support, and means for moving and
be slidably ejected therefrom. By replacing the
wrapping the support on the forming means to
arbor upon the belt in the position shown in Fig
advance the plastic element for compression be
ure 4 the binder forming operation of the ma
tween the forming means and the heated and
chine may be conveniently and rapidly reheated
cooled presser element-and to coil the plastic
for the forming of subsequent binders in rapid 60 element into a binder as the heating and cool
succession.
ing treatments are applied thereto.
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5. A plastic binder forming machine compris
shown in the drawings, provision has been made
ing a framework,~ av table supported thereon, a
for replacing this mandrel with other mandrels
movable support on- said Ytable for carrying a
of different diameters in order that binders of 65 blank to be coiled, a"heated and cooled seg
mental element rotatably supported on the frame
different sizes may be made. When arbors of
work,. a forming arbor on the movable support
different sizes are substituted, the selected sized
roller or mandrel may have the heated and air
positioned to coact with -said element, and means
cooled segments thereof properly positioned with
for rotating the element and moving the mov
respect to the arbor 3| by proper operation of 70 able support to advance the blank over the ele
the crank arm 45 with respect to the apertured
ment to subject the same to heat treatments and
^ segment-shaped bar 49, for causing proper posi
coil the treated blank around the forming arbor.
6. A plastic binder formingvmachine compris
tioning and coaction with the binder blanks be
While only one size of forming arbor has been
ing fed into the machine.
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While a round forming arbor-’of a selected siz
_ing a framework, a table supported thereon, a
75 traveling support on said table for carrying a
2,403,644
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'element andtosubjectone- portion of the blank
tothe heated segment to further heat the same
and-then vsubject¿anotherportion of the blank
blank to -be >coiled,„a_combinationV heatediand
cooled segmental element -rotatably- ;supported _on
the framework in contact with _the support, a
forming arbor removably supported on the rmov
to the cooled segment of thev pressure element
and curl the treated blank ,around the forming
able support and positioned to- coact with the
arbor to produce a binder which is removable
heated and cooled segments of ysaid element,`
yfrom the forming arbor when the controlm'eans
means for looping the movable support around
is swung away from the table vto cause the flex
the forming arbor„ and kdriving mechanism for
ible support to release the formingarbor,
rotating the element and for operating the mov
able support to advance theV blank vin timed xv, 10. ,A ‘plastic’ binder.î forming machine compris
ing-'a framework, a `tabley supported thereon', a
relationship over. the heatedr `and cooled seg
movable-flexible endless support, means on the
ments of the element and coil> the treated ,blank
around the forming arbor to produce a binder. ' framework Vfor `supporting the flexible support
with‘a portion -thereof passing over the table, a
7. A-plastic‘binder forming machine> compris
1
ing a framework, a table supported thereon, »a
follower Y supportedaon» the> flexible support above
movable' endless flexible support on said '_table
`for carrying a blank'to be coiled, a combination
' on Athelyflexible supporta sectional heated vand
heated >and cooled. segmental 'element rotatably
cooled pressure element rotatablysupported on
the frameworksV and >coacting :with »'theflexible
supported on the framework, a forming arbor
the table for properly positioning a plastic blank
carried by> they flexiblesupperti above said ele 20> supportgaformingïarbor free toïrîoll‘ onlthe ilexi
ble support 'above the pressure element, Vva con
ment, adjustable control means pivotally mounted
trol element pivotally mounted on the frame
on the framework and engaging the movable
work and engaging the flexible support 'and ’op
support and operable to loop a portion of the
movable support around the forming arbor, and ,
driving means for rotating the heated and cooled
segments of the element and for operating the
movable support to advance the blank over the
heated and cooled segments of the element and
coil the blank around the forming arbor to form
erable to cradle the forming arbor in a portion
of the flexible support and hold the Same above
the pressure element, means for adjusting the
control element to permit forming arbors of dif
, ferent sizes to be used in the machine, and a
driving mechanism on the framework for rotat
a binder which is removable-fromrthe forming 30 ingtl'ie pressure element and for operating the
endless flexible support to advance the plastic
arbor when the adjustable control means is oper
blank and move the same over the heated and
ated to unloop the belt to release the forming
cooled sections of the pressure element and coil
arbor.
y
8. A plastic binder forming machine compris
ing a framework, a table supported thereon, a
movable flexible support on said table for carry
- ing a blank to be coiled, a blank preheating
pressure element rotatably mounted on the
the blank around thevforming mandrel to pro
duce a binder which is releasable from the form
ing arbor when the control element is swung
into release position to free the forming arbor.
11. A plastic binder forming machine compris
ing a framework, a table supported thereon a
ments; a forming arbor removably supported on 40 movable flexible endless support, means on the
framework and including heated and cooled seg
the flexible support above the pressure element,
a control means pivoted on the framework en
gaging the flexible support and movable about a
stationary pivot into a position to loop- a portion
of the flexible support around the forming arbor,
and a driving means for operating the rotatable
pressure element and for driving the flexible
framework for supporting the flexible support
with a portion thereof passing over the table,
a follower supported on .the flexible support above
the table for properly positioning a plastic blank
on the ñexible support, a sectional heated and
cooled pressure element rotatably supported on
the framework and coacting with the flexible
support, a forming arbor free to roll on the flexi
ble support above the pressure element, a con
trol element pivotally mounted on the frame
the blank while retaining the remaining portion
work and engaging the flexible support and op
of the blank at its preheated temperature and
erable to cradle the forming arbor in a portion
then coil the entire blank around the forming
of the flexible support and hold the same above
arbor to produce a binder which is removable
the pressure element, means for adjusting the
from the forming arbor when the forming arbor
55 control element to permit forming arbors of dif
is released by the operation of the pivotal control.
ferent sizes to be used in the machine, a driving
9. A plastic binder forming machine compris
support to advance a preheated blank over the
pressure element to additionally heat a portion of
ing a framework, a table supported thereon, a
movable flexible endless support mounted to
travel over said table for carrying a blank to
be coiled, a follower resting on the movable sup
port’above the table to provide a backstop for
properly positioning the blank on the movable
support, a blank preheating presser element ro
tatably supported on the framework and includ
ing heated and cooled segments adapted to be
consecutively brought into engagement with the
movable support, a forming arbor removably
resting on the movable support above the pres
sure element, a pivoted control on the framework'
and engaging the flexible support adapted to be
swungr toward the table to cause a portion of
the flexible support to be looped around the form
ingarbor, and means for rotating thev pressure
i element and for operating theflexible supportV
to advance the preheated blank over the pressurel
mechanism on the framework for rotating the
pressure element and for operating the` endless
flexible support to advance the plastic blank and
move the same over Ythe heated and cooled sec
tions of the pressure element and coil the blank
Y around the forming mandrel to produce a binder
which is releasable from the forming arbor when
the control element is swung into release posi
tion to free the forming arbor, and means asso
ciated with the driving mechanism for setting
»the pressure element to properly position the
heated and cooled sections thereof with respect
~ to the blank being advanced when arbors of dif
ferent sizes are used.
_
_
.
12. In a machine for forming> co1led plast1c
binders from plastic blanks, said machine includ
Ying a rotatable pressure element having a heated
chamber and air cooling passages therein, a flexi
ble support driven thereby for carrying a plas?
2,403,644
12
ment comprising a chambered major segment
and a solid minor segment having cooling slots
therein.
tic blank over the pressure element to cause heat
ing and cooling of different parts of the blank,
a forming arbor removably supported on the flexi
ble support above the pressure element to coil
15. In a machine for shaping an article out
the blank, and a pivotally mounted control means
of material requiring the use of heat for treat
engaging the ilexible support for looping and un
ing the same, a cylindrical pressure element com
loo'ping a portion of the ileXible support with
prising a chambered major segment and a minor
respect to the forming arbor t0 permit curling
passaged segment, and means for heating the
of the blank around the forming arbor when the
chambered major segment from Within,
flexible support is looped around the forming ar 10
16. In a machine for shaping an article out
bor and to permit -removal of the coiled blank
of material requiring the application of heat for
from the forming arbor when the flexible sup
treating the same, an axially rotatable cylindri
port is unlooped to release the forming arbor.
13. In a machine for forming coiled plastic
binders, a cylindrical pressureA element compris
ing a large segment and a smaller air passaged
cal pressure element made up of segments, means
for heating one of said segments, means for cool
15 ing another of said segments, and means for
segment, and means for heating the larger of
said segments.
14. In a machine for forming a tubular binder
from a plastic blank, a cylindrical pressure ele 20
rotating the pressure element to alternately bring
the segments into coacting relationship with the
material as the article is being formed.
~
Y CHARLES EDWARD EMMER.
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