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Патент USA US2120304

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' June 14, 1938.
H. T.‘ WHEELER’
2,120,304 '
INCHING MACHINE
Original Filed Jlllly 118, 1932
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June 14, 1938.
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H_ T. WHEELER
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2,120,304
7 INCHING MAQHI-NE‘
Original Filed July 18, 1932 I
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A TTORMEYS.
Patented June 14, 1938
2,120,304
UNITED STATES
PATENT OFFICE”
2,120,304
INGHING MA‘GHINEJ
Harley T. Wheeler, Dallas, T’ex.
Original application July 18,_ 1932, swarm»;
623,301", now’ Patent 2,006,377,- dat'edl/ Jilly 2,
1935. Dividedi and? this application- June 29,
1935, Serial‘ No. 29,130
12‘ Claims.
My invention relates to a-device for acting'upon
strips of ?exible packing material so as to dis
This application is a» divisional application of
In. the drawings I have‘ shown my device as
mounted upon- a base I‘ which is‘ approximately
10 up of strips of‘ fabric or other pliable material
which is folded into. layers or pleats to then
end of the posti3;
assume a circular or coiled formation.
The'sha'ft 5 which is supported in the bear
ings 4 and 6 is slidable' longitudinally in said
bearings. Mounted upon‘ the shaft at a point
spaced from the post 2 is‘a cam member ‘I. Said
camis circular‘ in shape‘ and has on the side to
ward the post 2 a plurality of cam faces 8; which,
when the shaft is moved toward the post 2, will
It is the object of this invention to provide a
be stretched or deformed in passingthrough the
device so that one edge is made longer than the
other‘ and the strip is forced to assume’a curved
or circular shape.
I desire toprovide a device which will hold the
unstretched portion of the strip while a short
section adjacent thereto may be stretched more
strongly along. one edge into a triangular shape‘,
this operation being repeated on successive sec
tions of the strip until the entire strip has been
thus‘ treated.
It’ is a further object of the invention to pro
vide a device of this kind'which‘ mayv be easily
operated by themanipulation of a single lever.
Itis another object of the invention to‘ provide
a holding device for the strip to be'treated which
will automatically grip and release the strip-as
the successive stretching operations are per
formed by the device.
The invention lies in the particular construc
tion and arrangement of the parts making up the
complete machine, the structure of which will
be more clearly understood by reference to the.
drawings wherein:
40
Fig. 1 is a front elevation of my device, some
parts being broken away for greater clearness.
Fig. 1a is a broken detail showing a section of
packing and the gripping jaws.
Fig. 2'is a top plan view of the device shown in
45 Fig. 1.
Fig. 3 is a vertical section on the plane 3—-3
of Fig. 1.
Fig. 4 is a similar section taken on the plane
4—-4 of Fig. 1.
50
rectangular in shape and. elongated laterally.
Upon this base are mounted upright posts or
supports 2 and 31 The post 2' has, at the upper
end thereofr a bearing 4 for’ a horizontally ar
ranged shaft 5. A similar bearing 6 but some
what‘. more elongated is‘ formed at the upper
stretch or deform this packing so. that it will
15 device whereby astrip- of packing material may
35
Fig. 7' is a‘ view‘ of a" folded strip of material
tort the same from a straight strip to a coiled
my‘ copending application Serial No. 623,301,
?led July 18, 1932 now Patent-No. 2,006,377, dated
July 2, 1935.
It‘ is difficult particularly with packing made
30
(Cl. 154-1)
after it‘ has been‘ transformed in passing through
the device‘.
strip.
5
.
_
Fig. 5 is a horizontal section taken on the plane
5—5' of Fig. 1.
Fig. 6 is a side elevation of ‘a strip of ?exible
material which has been folded to form a plu
rality of pleats or folds therein, said'strip. being
55 formedito be acted upon‘ by my machine:
'
engage with a rack bar 9, ?xed upon the upper 1
end of.‘ the post 2 by screws ID‘. The forward
end. of said rack bar is beveled at H, as seen in
Fig. 2, so thatwhen it engages with any of the
cam faces8-‘it will tend to cause a rotative move
ment of the shaft 5.
.
At the opposite- end of the shaft are formed
a plurality of‘ similar cam faces‘ I2, said‘ cam
faces‘engagingwith a rack bar 13‘ mounted upon
the-upwardly extending armv M of a bracket I5
25"
secured‘to the outer face of‘the post 3. '
Mounted upon the’ba'se I‘isa sub-base or block
l6 which serves as a mounting forthe jaws which
serve‘ to grip the packing strip.
Immediately
upon the upperrsurface of the block‘ I6» is a chan
nel or trough-shaped‘stationary jaw H, the up
35
per face of which’ has opposed cam faces [8
which are- ?ared upwardly to- engage with a
wedging fit with the packing engaging jaws
which cooperate’ therewith.
At. opposite sidesiof the‘ stationary jaws I‘! are
laterallyiextending.bosses I 9, which have open
ings therein toreceivelateral trunni'ons vor pivot
members 2?-upon the» movable jaws» 2|. This will
be seen particularly.‘ from-Fig. 4. The said jaws
2| are spaced- apart and on the side extending 45
away from said pivot~2ll the jaws inter?t with
they downwardly inclined-“Walls I8 as seen in
dottedlines in Fig. 4'. The jaws~2l> are spaced
apart to include between the same the strip of
packing’ 22. I provide removable facing mem 50
bers or removable jaws 23 upon the inner sides
of the jaws 21, which may be of different thick
nesses -to accommodate. packing witha different
number of 1 fold-s therein, ,1 as will be obvious.
These-removable.facingwmembers» 23 are adapted
2
2,120,304
to frictionally engage the packing and hold it
?rmly between the jaws when said jaws are
forced together.
Extending upwardly from the jaws 2| are the
arms 24 which arms are connected at their upper
ends to a handle 25. A coiled spring 26 between
the arms 24 tends to force the arms and jaws
apart so as to allow the inserting between the
jaws of the packing material.
10
Between the arms 24 adjacent the upper end
is a block 21 slidable longitudinally of the arms
but movable laterally therewith and which has
an inner recess to ?t about a ball-shaped mem
mately into the dotted line position shown in the
drawings. The strip of material 22 shown in Fig.
1a will thus be stretched along its outer margin
but at the other margin it will remain practically
undistorted. As the outer margin is stretched
beyond its elastic limit it will not return to its
original form and I thus change the shape of a
shortsection of the packing from a shape with
parallel sides to one having approximately a
triangular shape, as will be noted in the drawings. 10
It will be seen that as the shaft approaches
the end of its right hand movement, the holding
jaws will be released momentarily before the
ber 28 upon the shaft 5 forming a ball and socket
15 connection with said shaft and permitting the
shaft is rotated to move the recess 39 away from
the roller 34. This ?rst movement of the lever 15
25 will cause the jaws 2| to act on the packing.
The roller will then engage in the recess 39 and
2| is offset away from the stationary jaws I'I so
that when the jaws 2| are rocked on the pivot
release the packing holding jaws 29 so that the
packing may move slightly. This movement will
then bring the cam faces 8 of the cam member
7 in contact with the stationary bar 9 and rotate
the shaft to a position with the recess 39 therein
presented away from the roller 34. When the
lever is then moved to the left to release the jaws
2| the jaws 29 will still hold the strip of material.
At the end of the lefthand movement the cam
|2 will engage the bar l3 and rotate the shaft to
present the recess 39 downwardly. The jaws 29
are held closed during the righthand movement
of the lever until the recess 39 registers with the 30
roller 34 which allows release of the said jaws.
When the handle is moved. back again toward
the left the movable jaws will release the pack
ing also and assume an open position ready to
sliding of said shaft through the swinging of said
lever. It will be noted that the pivot 20 for jaws
20 20 by the swinging of the lever to the right in
the direction of the arrow, the sides of the jaws
2| will wedge between the inclined walls l8 of
the stationary jaw and be clamped tightly to
gether as soon as this rocking movement is in
25 itiated. Thus the two jaws will be immediately
clamped upon the strip of packing material when
the lever is operated.
Adjacent the movable jaws 2| are a somewhat
similar pair of holding jaws 29. Said jaws are
30 tapered at their lower ends, as shown at‘ 30 in
Fig. 3, to cooperate with the cam faces of the
stationary jaws and it will be seen that when the
holding jaws are moved downwardly relative to
the stationary jaws the holding jaws will be
35 forced together in clamping position. I provide
removable gripping faces 3| upon the holding
jaws, said faces being similar to those employed
with the movable jaws.
.
'
Mounted upon each of the ends of the jaws
29 is an upright arm 32 which, as seen in Fig.
3, is engaged at its upper end with an axle or
trunnion 33 upon a roller 34. Said roller is
formed with a curved annular recess 35 therein
to ?t against the lower side of the shaft 5. The
45 two arms 32 are slidable within a guide member
36 projecting from the side post 3.
There is a coil spring 31 between the arms 32,
which tends to force them resiliently apart and
because of the engagement of‘ the lower ends of
50 the jaws against the cam faces of the stationary
jaws, the said holding jaws together with the
arms thereon tend to be moved upwardly due to
this wedging effect under the action of the spring
31. This action holds the upper roller 34 ?rmly
55 against the lower side of the shaft 5. To allow
the holding jaws to move upwardly I form a
plurality of recesses 39 upon the shaft 5 into
which the roller 34 may be moved when the said
recess is translated to a position above said roller.
60 As will be seen from Fig. 5, the inner removable
obtain a new grip on the strip.
3.5
It will be obvious that this system of operations
can be rapidly performed and at each complete
cycle of operations a short section of the pack
ing strip will be acted upon so as to stretch the
upper margin thereof but leave the inner margin 40
practically unaffected. This will, however, bring
the packing thus acted upon into the curved
shape shown in Figs. 1 and 7. I am thus en
abled to take a folded strip of material such as
seen in Fig. 6, wherein there are a plurality of 45
pleats or folds of material and stretch the same
along one margin relative to the opposite mar
gin. Considerable force is necessary to do this
but with the arrangement shown in my device I
am enabled to do this rapidly and effectively. 5,0
Strips of material lying in straight folds can be
curved to lie in the arc of a circle, thus making
up a coil or ring of material adapted to ?t with
in the ordinary stuf?ng box. The advantages of
this construction will be obvious to those skilled
in the art.
What is claimed as new is:
l. A device of the character described com
prising a base, spaced stationary jaws on said
base, upwardly ?aring cam faces on said jaws, a 60
facing members 3| upon the holding jaws are
pair of holding jaws, downwardly tapered faces
provided with laterally extending ?anges 40,
thereon to engage between said stationary‘jaws,
means to move said holding jaws toward said
stationary jaws to gripping position, spring means
to move said holding jaws to releasing position, 65
which overlap the edges of the jaws 29 to a
slight extent. The ends of these ?anges contact
66 with upright guide posts 4|, between which the
packing strip 22 is inserted.
The operation of my device will now be clear.
When the packing strip 22 has been inserted
into position between the holding jaws and the
70 movable jaws the movement of the lever 25 in
the direction of the arrow will engage the jaws
2| between the cam faces of the stationary jaws
I‘! and cause them to grip the packing strip.
As the jaws 2| are rocked on the pivot 20 they
75 will move through the arc of the circle approxi
movable jaws adjacent said holding jaws pivoted
to swing toward or away from said holding jaws,
means on said movable jaws to engage said sta
tionary jaws to close said movable jaws as the
latter are swung away from said holding jaws 70
and a lever to swing said movable jaws.
2. A device of the character described com
prising a base, spaced stationary jaws on said
base, upwardly ?aring cam faces on said jaws, a
pair of holding jaws, downwardly tapered faces 75
2,120,304
thereon to engage between said stationary jaws,
means to move said holding jaws toward said sta
tionary jaws to gripping position, spring means
to move said holding jaws to releasing position,
movable jaws adjacent said holding jaws pivoted
to swing toward or away from said holding jaws,
means on said movable jaws to engage said sta
tionary jaws to close said movable jaws as the
latter are swung away from said holding jaws
10 and a lever to swing said movable jaws, said le
ver serving to actuate the means for moving said
holding jaws.
3. A device of the character described com
prising a base, spaced upwardly ?aring stationary
15 jaws thereon, cam faces on said jaws, holding
jaws having tapered ends to engage between
said stationary jaws and be forced together there
by, a pair of movable jaws adjacent said hold
ing jaws, said movable jaws being pivoted to
20 rock toward and away from said holding jaws,
beveled lower ends on said movable jaws engag
ing between said stationary jaws to force said
movable jaws together when they are rocked, and
a lever to move both said holding jaws and said
25 movable jaws to closed position between said
stationary jaws.
4. A device of the character described com
prising a base, spaced upwardly ?aring station
ary jaws thereon, cam faces on said jaws, hold
30 ing jaws having tapered ends to engage between
said stationary jaws and be forced together there
by, a pair of movable jaws adjacent said hold
ing jaws, said movable jaws being pivoted to
rock toward- and away from said holding jaws,
35 beveled lower ends on said movable jaws engaging
between said stationary jaws to force said mov
able jaws together when they are rocked, springs
between said holding jaws and between said mov
able jaws to urge said jaws apart, and a lever
40 to move both said holding jaws and said mov
able jaws to closed position between said sta
tionary jaws.
5. A device for stretching packing strips in
cluding a base, a trough shaped member having
45 opposed ?aring cam jaws ?xed to said base, a
set of holding jaws movable toward and away
from said cam jaws, a spring tending to move
said holding jaws apart, a shaft to move said
holding jaws toward and between said cam jaws
50 and close the same, movable jaws adjacent said
holding jaws, means to move said movable jaws
toward and away from said holding jaws and to
stretch a, strip of packing held by said holding
Jaws.
55
6. A device for stretching packing strips in
cluding a base, a trough shaped member hav
ing opposed ?aring cam jaws ?xed to said base,
a set of holding jaws movable toward and. away
from said cam jaws, a spring tending to move
60 said holding jaws apart, a shaft to move said
holding jaws toward and between said cam jaws
and close the same, movable jaws adjacent said
holding jaws, means to move said movable jaws.
3
toward and away from said holding jaws and to
stretch a strip 'of packing held by said holding
jaws, said means acting also to move said shaft
to operate said holding jaws.
,
7. A device for stretching packing strips in
cluding a base, a trough shaped member having
opposed ?aring cam jaws ?xed to said base, a
set of holding jaws movable toward and away
from said cam jaws, a spring tending to move
said holding jaws apart, a shaft to move said 10
holding jaws toward and between said cam jaws,
and close the same, said spring tending to force
said holding jaws away from said cam jaws, and
means adjacent said holding jaws to grip a strip
of packing held by said holding jaws and stretch 15
one edge thereof.
8. In combination, a pair of packing strip
holding jaws, a pair of movable jaws pivoted ad
jacent said holding jaws, and means to rock said
movable jaws to engage and stretch one edge of 20
said- packing strip to a greater extent than the
opposite edge.
‘
9. In combination, a pair of packing strip
holding jaws, means to move said jaws together
to grip said strip, a pair of movable jaws piv 25
oted adjacent said holding jaws, and means to
rock said movable jaws to engage and stretch
one edge of said packing strip to a greater ex
tent than the opposite edge.
10. A packing forming device including a pair 30
of packing holding jaws, a pair of stretching jaws
pivoted to rock toward and away from said hold
ing jaws, a pair of spaced cam members adapt
ed to be engaged by said jaws to force said jaws
together to grip said strip,’ a lever to move said 35
stretching jaws and means actuated by said le
ver to hold said holding jaws in packing grip
ping position.
,
11. A packing forming device including a base,
stationary jaws thereon, holding jaws mounted 40
to move toward and away from said sta
tionary jaws, movable jaws pivoted to swing
relative to said stationary jaws, a lever to
swing said movable jaws to engagement be
tween said stationary jaws, a shaft slidable by
said lever, means to move said holding jaws to- 1
45
ward said shaft, and recesses in said shaft to‘
permit movement of said holding jaws away from
said stationary jaws.
12. A packing forming device including a base,
stationary jaws thereon, holding jaws mounted 50
to move toward and away from said stationary
jaws, movable jaws pivoted to swing relative to
said stationary jaws, a lever to swing said mov
able jaws to engagement between said stationary
jaws, a shaft slidable by said lever, means to
move said holding jaws toward said shaft, arms
on said holding jaws, a roller on said arms, said
shaft being recessed to receive said roller to per
_mit movement of said holding jaws to open po 60
sition, and means responsive to the sliding of
said shaft to rotate the same.
HARLEY T. WHEELER
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