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Патент USA US3095141

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June 25, 1963
Filed July 6, 1959
7 Sheets-Sheet 1
June 25, 1963
Filed July 6, 1959
7 Sheets-Sheet 2
June 25, 1963
Filed July 6, 1959
7 Sheets-Sheet 3
Il li
June 25, 1963
Filed July 6, 1959
7 Sheets-Sheet 4_
KENWAY, 15mm, wins; a. HILQRETH
June 25, 1963
Filed July 6, 1959
7 Sheets-Sheet 5
June 25, 1963
Filed July 6, 1959
'7 Sheets-Sheet 6
F IG. l6
June 25, 1963
Filed July 6, 1959
'7 Sheets-Sheet '7
Patented June 25, 1963
FIG. 13 is a fragmentary view thereof in end eleva
John Douglas Robertson, Tauntou, and Raymond H.
Foster, Norton, Mesa, assignors, by mesne assignments,
to Mount Hope Machinery Company, Taunton, Mass-,
a corporation of Massachusetts
Fiied July 6, 1959, Ser. No. 825,074
10 Claims. (Qt. 226—190)
FIG. 14 is an enlarged fragmentary top plan view of
FIGS. 11 and 12 with the parts in another position,
FIG. 15 is a front elevation of FIG. 14,
FIG. 16 is a bottom plan view of the FIGS. 14 and 15,
FIG. 17 is an enlarged fragmentary detail view taken
on line 17—17 of FIG. 15, and
FIG. 18 is a plan view partly in section of a segmented
This invention relates to a novel method and apparatus 10 roller utilized to change the direction of travel of a web.
for guiding and aligning traveling webs of various mate
rials such as paper, fabrics, etc. of varying gauge and
Referring ?rst to the form of invention illustrated in
FIGS. 1-5, it) indicates the supporting base of our web
guiding device which is adapted to be ?xed to and sup
?exibility, and especially to novel method and apparatus
for correcting misalignment of the web without causing
ported on the machine employed for feeding the traveling
wrinkling or otherwise damaging the web.
15 web 12. The machine is adapted to feed the web for
‘In accordance with a preferred embodiment of our
wardly in the direction indicated by the arrows and the
invention we feed the traveling web forwardly-rearwardly
function served by our invention is automatically to‘ main
and rearwardly-forwardly about two web supporting abut
ments and correct any misalignment in the web‘ ‘by pivot
tain the web in true feeding alignment and including the
automatic correction of any misalignment that may de
ing the abutments laterally as a unit in one direction or 20 velop as the web travels forwardly, as to a rewinding
the other whereupon the web is biased in the correcting
roll 14. Two parallel web guiding rolls 1‘5 and 17 are
rotatably supported on the base 10 and our web guiding
thus biased is led through equal helical paths about the
mechanism is disposed between these rolls to receive
abutments the web maintains its straight alignment about
the web from the roll 15 and deliver it to the roll 17.
the abutments and no wrinkling of the web results. It is 25
‘Our Web guiding mechanism as illustrated in FIGS.
also desirable that the web shall contact the abutments
1-5 employs two parallel web supporting abut-ments 18
with minimum possible friction, especially for fragile
and 26, both comprising rollers rotatably mounted at
webs, and our invention contemplates improvements
their ends in the upright portions 21 of a frame includ
whereby such minimum friction is effected through the
ing a tubular bar 22 rigidly supporting the two uprights
employment of rotary abutments and the web made to 30 at its two ends. The frame is mounted for pivotal move
pass through said helical paths and correct misalignment
ment on a post 24 extending through the bar and sup
without wrinkling or damaging the web, all as hereinafter
ported in a yoke 25 carried on the base lit. The rolls 15
more speci?cally described.
and 17 are disposed right-angularly across the web 12
An important feature of the invention relates to the
and in the normal position of the vframe 21—22 the
employment of a rotary abutment in the form of a cylin 35 abutments 13 and 2% are parallel with the rolls 15 and 17.
drical roller having a plurality of web supporting bars
The pivoting of the frame is under the control of auto
extending longitudinally thereon at its periphery and dis
matic sensing mechanism herein indicated as a sensing
posed in parallel relation concentrically about the rotary
?nger at 26 in contact with one edge of the web 12 and
axis of the roller, the bars being movable both forwardly
frame pivoting mechanism including a cylinder 27 hav
and laterally with the web and thereby conducting the 40 ing a piston therein provided with a piston rod 28 con
web freely in a helical path on and about the roller with
nected to the bar 22. The arrangement is such that under
out placing appreciable tension on the web. The produc
normal conditions and when there is no misalignment in
tion of a novel method and apparatus for thus facilitating
the web the frame 21—22 will remain in its normal posi
the web guiding and aligning functions comprises a fur
tion. However, should the web deviate laterally in one
ther object of the invention.
direction or the other the ?nger 26 Will follow the web
These and other features of the invention will be best
and cause pivoting of the frame in a direction to correct
understood and appreciated from the ‘following descrip
the misalignment. Such sensing mechanisms are known
tion of preferred embodiments thereof selected for pur
in the art, as for example, in Patents 2,291,830 and 2,814,
poses of illustration and shown in the accompanying draw
487, and per se form no part of this invention.
ings in which:
The web 12 is fed forwardly in a plane path P (FIG.
FIG. 1 is a fragmentary perspective view of a Web
3) onto and arcuately about the roller 18, from thence
guiding device embodying our invention,
rearwardly to and arcuately about the roller 20, and from
FIG. 2 is a plan view thereof,
thence forwardly in a second plane path P’ parallel with
FIG. 3 is a fragmentary side elevation,
the path P. The sensing ?nger 26 is disposed to contact
vPIG. 4 is an end elevation, partially broken away, of 55 the edge A of the web forwardly of the roller 20. If, for
a segmented web guiding roller shown in FIGS. 1-3,
example, the entering portion of the web at P shifts grad~
FIG. 5 is a side elevation of the roller, partially broken
ually to the left (FIG. 2) a distance Y from its normal
position, the ?nger 26 will sense the change and cause
‘FIG. 6 is a fragmentary elevation, partially in sec
pivoting of the frame 21-—22 to an angular position to
tion, of a modi?cation thereof,
correct the misalignment. It should be understood how
FIG. 7 is an end elevation of a further modi?cation
ever that this lateral shifting of the web is immediately
We have discovered that when the web as
sensed by the ?nger 26 which, operating through the
tion thereof,
As illustrated, this angular displacement of the rollers
FIG. 8 is an enlarged elevation of a portion of the
cylinder 27, functions immediately to correct the mis
roller shown in FIG. 7,
alignment and such functioning continues so long as there
FIG. 9 is a view like FIG. 3 but showing a modi?ca 65
is any continued increase in the amount of misalignment.
FIG. 10 is a like view showing a further modi?cation,
FIG. 11 is a fragmentary plan view of a modi?ed
18 and 26 causes the web to move to the right. During
such movement the web remains in contact with the ?n
70 ger 26 thereupon causes the frame 21-22 to remain in
such position as will continue to correct the misalignment.
FIG. 12 is a like view of the parts in a different posi
Men the web 12 passes around the rollers 18 and 20,
construction including certain automatic controlling mech
as illustrated in FIG. 2, it would follow equal helical
tact 62 carried by the bar and spring pressed into engage
paths therearound if no friction were present where it
contacts the rollers. However, since each part of the
roller in contact with therweb moves in a circular path
ment with a commutator strip 64. The web enters and
leaves the roller as indicated by the arrows in FIG. 7
and during the downward idle movement of the bars the
contacts serve to energize the coils whereupon the cores
are centralized therein and serve to centralize the Web
about the axis‘ of the roller and whereas the helically
moving web also travels longitudinally of the roller there
supporting bars.
is‘ necessarily a frictional sliding relation between the web
It will now be apparent that the segmental bars 36-37
and roller. We have found that whereas the tensioned
provide web supporting means on the roller 20 that travel
'web vwill pass in a true helical path around one rotary
both forwardly and laterally with the web, thereby ac
roller it tends to wrinkle and tear when passing there
commodating the lateral shifting of the web during its
from to and in reverse relation about the second rotary
helical passage about the roller and eliminating the web
roller. This action is due to the frictional contact of the
roller friction heretofore present. Thus the freely mov
web with the rollers and the fact that the web necessarily
able bars in effect provide a frictionless roller 20 whereby
travels laterally whereas each roller point of contact
travels in a plane circular path. ‘Our invention con 15 the Web delivered thereonto from its helical path about
the roller 18 freely follows a true helical path about the
templates novel means for eliminating this difficulty and
substantially eliminating the frictional relation between
roller 20, thereby eliminating any canting and wrinkling
the web and at least one roller. We accomplish this ob
of the web as occurs when both rollers present frictional
resistance to the lateral movement of the web.
ject by making one or both of the abutments 18 and 20
We are aware that non-rotary abutments 18 and 20
a segmental roller in which the web engaging and sup 20
porting portions not only rotate with the roller but also
travel longitudinally therealong with the lateral move
can-be employed at 18 and 20 without causing wrinkling
of the web between the abutments but the friction re
ment of the web. This mechanism as illustrated in FIGS.
quired to be overcome with such abutments, both longi
tudinally and laterally of the web, is very objectionable
l~5 will now be described.
In FIGS. 1-5, we have illustrated the abutment 18 as 25 and troublesome, especially with light and fragile webs
which cannot sustain the work load thus placed on the
embodying a plain cylindrical roller and the abutment
2b as embodying a segmented roller. The segmented
web. The use of rotary abutments which eliminates
the longitudinal friction is highly desirable and our in-.
roller includes,‘ two ?anges 30 ?xed in spaced relation on
vention herein makes such use possible with two com
an axle 32 mounted to rotate in bearings 33. Supported
for free longitudinal movement in aligned bushings 34 30 panion rollers and. furthermore eliminates the lateral
in the ?anges are a plurality of bars disposed concen
friction in at least one of the abutments.
As illustrated
in FIGS. 3 and 9, either abutment 18' or 20 can employ.
trically about the axle, each bar embodying a web sup
the segmental roller embodied in our invention and ex
porting shoe 36 having end portions 37 welded thereto
and slidable longitudinally in the bushings 34. The shoes
cept for the added expense involved, the use of ‘our seg
illustrated are of T-shape and are supported for rotation 35 mental roller for both abutments, as illustrated in FIG.
with the axle by rollers 38 riding in longitudinal chan
10, eliminates longitudinal and lateral friction in both
nels 40 in a hub 42 secured to the axle as by a set screw
43. As best illustrated in FIG. 4, the shoes provide
contiguous Web supporting surfaces entirely around the
peripheral portion of the roller.
As illustrated in FIG. 4 the forwardly moving web
contacts the roller at its lowermost portion, passes 180°
therearound in contact with the shoes 36 and leaves at
its topmost portion, and the bars 36—37 are free to travel
longitudinally with and thus accommodate lateral move
abutments and provides substantially perfect helical fric
tionless tracking of the web about the abutments. 'In
FIG. 9 the segmental roller is shown at 65 and the plain
40 roller at 66 and in FIG. 10 two segmental rollers 67 are
two cam tracks 44 disposed to contact the free ends of
While in the form of invention shown in FIGS. 1—1()
We have mounted the web supporting bars 36-37 for
free longitudinal movement on the’ roller 20 and have
depended on the web for moving the bars longitudinally
in the helical tracking of the web, our invention also
contemplates a positive moving of the bars to accommo
date the lateral shifting of the web and to guide it through
portions 37 during their idle travel'downwardly (FIG. 4)
the required helical path about the roller. The machine
ment of the web during this passage. Also cooperating
with the end portions 37 at the two ends of the roller are
and thus centralize the shoes 36 longitudinally as they 50 shown in FIGS. 11-17 of the drawings for performing
reach the web-engaging position.
this function will now be described.
sliding contact of the bar end portions 37 with the cam
The web supporting abutments 68 and 70 shown in’
FIGS. ll—'17 correspond to the abutments 18 and 20
contacts 44 and in FIG. 6 we have illustrated a modi?ed
shown- in FIGS. 1-10 and comprise rollers rotatably
In some cases it may be, desirable to avoid frictional
In this case the two cam 55 mounted in a like frame including plates 72 rigidly sup
tracks 44 have been replaced by, two disks 46 each
ported on the ends of a bar 74 pivoted at 75 on an ‘up
mounted at the angle illustrated in FIG. 6 on a hub 48
right 76 rigidly supported on a plate 77 corresponding to
carried on the axle 32. Each disk is mounted to rotate
the base 10. The web supporting bars 78 are herein illus
construction for this purpose.
on ball-bearings 50 and is rotated with the roller by
trated as cylindrical rods having reduced end portions
means of a pin 52 carried by the roller and extending 60 79 mounted ‘to slide longitudinally through bushings in
through a hole in ‘the disk. As will be apparent, the
spaced'?anges 80 carried on an axle 82 mounted in hear
lowermost portions of the two disks are spaced apart a
ing, supports 84. The web 12 is fed forwardly in a plane
distance to engage the ends of the bars 36--37 and cen
path P (FIG. 13) to and arcuately about the plain roller
tralize them as they approach the web-engaging position.
abutment 68, thence rearwardly to and arcuately about
It may also be desirable to face the disks with rubber 65 the segmented roller abutment 70 and thence forwardly
or other shock absorbing material illustrated at '54.
I Other means can be provided for centralizing the Web
in a plane path P’ parallel with the path P.
Whereas in the invention illustrated in FIGS. l-lO
supporting bars 36-37 and in ‘FIGS. 7 and 8 we have
the web functions to move. the bars 3‘6—37 longitudinally
illustrated a modi?ed construction for this purpose. In.
therewith as the web travels helically about the roller 20,
' this case the web supporting bars have non-magnetic end 70 the mechanism shown in FIGS. 11—'17 provides means for
portions 56 projecting from one end thereof and out
automatically moving the bars 78 longitudinally to con-'
wardly beyond the adjacent supporting ?ange 30 and
form to the lateral shifting movement of the web as the
each such portion carries a laminated soft iron core 58
web travels in a helical path about the roller. The mech
therein. A solenoid coil 68 surrounding each such por
anism for performing this function includes two ?exible
tion and core is grounded to the ?ange ‘3.0 and .to a con 75 cam tracks in contact with the ends of the websupporting
bars together with a novel system of levers for’ auto
matically ?exing the cam tracks into helical form of vary
ing degree pitch when ?exed from the normal position
by pivotal movement of the abutment supporting frame
The two cam tracks comprise two ?exible annuli 85
respectively in contact with the ends of the bars 78-79
at the two ends of the roller. Each such annulus is an
chored at its bottom portion to a bracket 86 extending
by those skilled in the art without deviating from our
An important advantage of this guiding mechanism is
the high ratio of lateral guiding displacement to longi
. tudinal travel of the web which it provides. The high
ratio is made possible because of the fact that during
operation of the device, both edges of the web follow
paths of equal length during corrective lateral displace
This is accomplished by causing both edges of the web
inwardly from the adjacent bearing support 84. Dia
metrically opposite thereto each annulus is split and its 10 to travel in helical paths about cylindrical abutments.
two ends hinged together on a pivot pin 88. The ends
of each such pin are supported in a yoke 89 on one end
of a link 90 pivotally connected at 91 at its other end
When the web is pulled around a cylindrical abutment,
the path tends to be helical since the shortest distance
between two points on a cylinder is a helix.
When the
web edges travel in such helical paths, the web has a
plate 72. The other ends of the two levers 92 at the 15 lateral component of motion. Obviously the lateral mo
tion is required to provide the necessary lateral guiding
ends of the roller are pivotally connected at 94 to two
correction. When the web is traveling about a ?xed abut
links 95 in turn pivoted together on a ?xed post at 96.
ment, there is a force opposing its motion over the abut
When the frame 72—74 is in the position shown in
ment equal to the amount of friction between the web
FIG. 11 the two cam tracks 85 are in two parallel planes
20 and the abutment. The source of available force is the
and hold the web supporting bars 78—79 centralized there
to a lever 92 pivoted at 93 to a bracket on the adjacent
between, each annulus 85 being anchored in such plane
on its bracket 86.
In such position each cam face is
tension applied to the web by power driven take-up rolls,
or the like, located beyond the guiding mechanism. This
force overcoming the friction lies on the surface of the
right angular to the rotary axis of the roller and each
pin 88 is parallel to the face of its cam. The distance 25 abutment and is parallel to the lengthwise direction of
the web. Therefore, the direction of slippage of the web
C between the pivots 91 and 93‘ (-FIG. 14) is equal to
on the surface of the abutment is in the direction of the
1rD/ 2 D being the diameter of the segmental roller. The
pull of the web; i.e., parallel to the center line of the web.
distance between pins 94 and 96 is equal to the distance
When no guiding correction is required, the axis of
between the pivots 75 and 93 and the distance between
pivots 96 and 75 is equal to the distance between pivots 30 the abutment is oriented normal to the desired path of
the web and there is no lateral component of motion of
94 and 93, thereby forming a parallelogram with corners
the web in passing around the abutment. When a guiding
at 75, 93, 94 and 96. When the frame 72-74 is pivoted
correction is required, the axis of the abutment is tilted
about the axis 75 in either direction from the neutral posi
about an axis perpendicular to the approaching web and
tion shown in FIG. 11, to correct misalignment of the
web, one lever 92 pivots outwardly and the other inwardly 35 the tension of the outgoing web pulls the oncoming web
about the abutment in the shortest path, which is a helix,
and ?exes the cam tracks equally and in opposite direc
because friction force opposing the motion of the web
tions into helical con?guration. This con?guration in
acts parallel to and in the opposite direction to the rela~
each track forms a cam face helix extending from the
tive motion of the web and the surface of the abutment.
?xed portion thereof at 86 to the hinged pivot 88 and
When the abutment is a non-rotatable cylinder, the path
from thence back to the anchor 86 and the pitch of the 40
of the web is a helix. When the abutment is a plain
helix varies with the pivoted extent of the frame.
rotatable cylinder, the pull of the outgoing web rotates
It will now be apparent that the web supporting bars
the cylinder instead of sliding the web over it, thus tend»
78 and 79 are held in ?xed centralized position when the
frame 72—T4 is in the neutral position of FIG. 11 and \ ing to guide each lengthwise element of the in-coming
that as the frame is pivoted about the pin 75 in either 45 web away from its desired path, and into a plane at right
direction from the normal the two cam tracks 35 are
?exed to helical shape adapted to move the bars longi
tudinally upon rotation of the roller and carry all web
angles to the axis of the rotating cylinder and passing
through the last previous point, which controlled the loca
tion of the element. Usually such last previous point is
the location of the element as it leaves the roll immedi
engaging points thereon through the true helical path
required. This bar-moving helical path corresponds with 50 ately before the rotating abutment mentioned above.
the forward movement of the web through 180° on the
roller from the point 97 to the point 98 (FIG. 13) and
during the remaining 180° rotation of the roller the other
If a freely rotatable slatted cylindrical abutment is
used with linear anti-friction bearings between the slats
and their supports, the friction between the web and the
slats is su?‘lcient to move the slats in the direction and to
half of the cam tracks return the bars to centralized posi
tion. It is noted that the 180° wrap of the web on the 55 the amount required to permit the web to be pulled in a
helical path.
roller from point 97 to point 98 is a distance 1rD/2 which
Having thus disclosed our invention what we claim as
is equal to the distance between the pivot 93 and the axis
new and desire to secure by Letters Patent is:
of the roller. While we have herein illustrated the web
l. A web guiding apparatus comprising in combination,
as wrapped 180° about the rollers it should be under
stood that other degrees of wrap may be employed so 60 means including two parallel web supporting abutments
long as the entering and exiting reaches P and P’ of the
web are maintained parallel.
Also while we have herein speci?cally illustrated and
for guiding a traveling web forwardly through a prede
termined plane path to and arcuately about one of said
abutments, from thence rearwardly to and arcuately about
described our novel segmented rollers 20 and 70 as em
the other abutment and from thence forwardly in a plane
ployed in combination with certain web guiding and align 65 path parallel with the ?rst named path, one of said abut
ments being a cylindrical roller and including a plurality
ing mechanism, we desire it to be understood that such
of web engaging bars extending longitudinally thereof
rollers are adapted to serve other useful and important
and disposed in parallel relation concentrically about the
web guiding functions within the scope of our invention.
For example, it may be desired to change the direction
rotary axis of the roller, means supporting the bars for
of travel of a web (as shown in FIG. 18) or to reverse the 70 longitudinal movement on the roller, means cooperating
with the ends of the bars for automatically centralizing
two faces of a web and our novel rollers are adapted to
them longitudinally uuon rotation of the roller to a pre
perform these and other like functions with facility and
determined position, a frame supporting said abutments
at their ends and including means rotatably supporting
We are aware that many modi?cations may be made 75 the roller, and means supporting the frame for pivotal
without causing wrinkling or otherwise disturbing the free
and uninterrupted travel of the web.
movement about an axis disposed normally ‘to'the planes‘
of said paths.
operating with the ends of the bars ‘for automatically
centralizing them longitudinally upon rotation of the roll:
2. The combination de?ned in claim 1 in which the
er to a predetermined position, a frame supporting said
abutments at their ends and including means rotatab‘ly
bars are supported for free movement longitudinally
and said means cooperating with the bars comprises cam
tracks disposed automatically to centralize the bars lon
gitudinally upon rotation of the roller by contact of the
supporting the roller, and means supporting the ?rame for pivotal movement about an axis disposed normally a
_ to the planes of said paths.
8. The combination de?ned in claim 7 plus means
ends of the bars with said tracks, and means for rotating
supporting the scam tracks in ?xed position relative to
the cam tracks with and at the ends of the roller.
3. The combination de?ned in claim 1 in which the 10 the bars and roller.‘
bars are supported for free movement longitudinally and
9. A Web guiding device, comprising a cylindrical
said means cooperating with the bars comprises a plu
roller having a plurality of web, supporting bars extend;
ing longitudinally thereon‘ at its periphery and disposed
rality of solenoids respectively cooperating with the bars
and having contacts disposed to engage a commutator
in parallel relation concentrically about’the rotary axis
track located at one end of the roller.
15 of the roller, means mounting the roller for rotation on
7 4. The combination de?ned in claim 1, in which said
said axis, means supporting the bars for free. longitu
means cooperating with the ends ofv the bars comprises
;, dinal movement on the roller parallel with said axis,
two resilient cam tracks respectively located at and con
tacting the two ends of the bars, and means for auto
contact with the opposite ends of the bars ofi-automati
two opposing ?exible annuli‘ respectively in continuous
matically ?exing the cam track into helical form of vary 20 cally driving the bars longitudinally upon rotation of
ing degree pitch as the frame is rotated in one direction
the roller to cause each point on said bars to follow'a
or the other about said axis from a neutral position in
closed helical path on each revolution of said roller, and
which said abutments extend right-angularly across said
means connecting said’ annuli for unitary‘iand simul
taneous ?exing movement longitudinally of the bars.
5. The combination de?ned in claim 4 in which each 25
10. The web guiding device de?ned in claim 9 in
of said cam tracks comprises a resilient annulus an
chored at one peripheral portion thereof to said frame
and having its diametrically opposite portion split into
' which each ?exible annulus normally rests, in a common
plane disposed right angularly to said axis, and means
disposing the annuli into helical form of varying degre
two ends and hinged together on a radial axis, and in
pitch when ?exed from the normal position.
which the last named means comprises a system of levers 30
References Cited in the ?le of this patent
connected to the hinged portions of the tracks.
6. The combination de?ned in claim 5 in which said
system of levers comprises two arms respectively pivoted
Lewis ___________ ..L_____ July 9, 1901
at one end each to the \frame at opposite ends of the
Bolton _____________ __ May 13,4924
roller and connected intermediately of the ends thereof 35 1,493,954
____ _._v ________ __ Nov. 24, 1931
to said hinged portions :of the tracks, and two arms con
Eckstein ____________ __ June 30,‘ 1942
nected together at their inner ends on a ?xed pivot and
Hlavaty __________ _.'___ ‘Nov. 10, 1942
pivoted at their outer ends to the other ends of th
?rst named arms.
7. A web guiding apparatus comprising in combina 40
tion, means including two parallel web supporting abut
ments for guiding a traveling web to and arcuate about
one'of said abutments and from thence to and arcuately
about the other, abutment, one of said abutments being
a cylindrical roller and including a plurality of web en 45
gaging bars extending longitudinally thereof and dis
posed in parallel relation concentrically about the rotary
axis of the roller, means supporting the bars for ‘lon
gitudinal movement on the roller, cam track means co
Lorig ________________ __ Dec. 5,
Kentis ______ _;_' ______ __' July 3}
Lorig ______________ __ Nov. 27,v
Hasselquist _________ __ June 23,
Morrow _‘ ___________ _; Tan. 17,
Levine _____________ __ June 26,1956
Faeber ____ _'_ _______ __ Jan. 28, 1958’
France ______________ __ Apr. 9, 1934
Canada ____________ __ June 12, 1951
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