Note: Descriptions are shown in the official language in which they were submitted.
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APPARATUS FOR JOINING PLIES OF
MATERIAL SUCH AS TEXTILE FABRIC
Background of the Invention
This invention relates to apparatus for
forming plies of material such as textile fabric or
the like, and more particularly to apparatus for
sewing plies of material together with controlled
guidance of the plies.
Cross-Reference to Related Application
This application is a division of copending
application Serial No. 277,937, filed May 9, 1977.
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Summary of the Invention
Among the several objects of this invention
may be noted the provision of improved apparatus for
joining plies of material such as textile fabric in
which the plies are contour seamed along an edge thereof,
i.e., seamed together with the edges automatically regis-
tered as the plies are fed through the apparatus by a
contour guide means, and in which the feed of the plies
to the contour guide means is controlled for proper
~ 20 presentation of the plies to the contour guide means.
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In general, apparatus of this invention for
joining plies of material, s.uch as textile fabric, com-
prises means for seaming the plies together along an
edge thereof, means for feeding the plies through the
seaming means, and contour guide means~ for shifting the
plies as they are fed forward by the feeding means to
effect contour seaming of the plies, with the improvement
comprising the provision of means for controlling the
feed of the plies to the contour guide means, said con-
trol means comprising a control clamp for clamping the
plies as they are fed forward, means mounting the clamp
for movement with the plies as they are fed forward and
also for side-to-side movement relative to the direction
of feed, means for sensing the position of the edge of
the plies as the plies approach the contour guide means,
and means responsive to said sensing means for shifting
said clamp from side to side as it moves forward generally
to al.ign the edge of the plies with the contour guide means
~; as the plies enter the latter.
Other objects and features will be in part
apparent and in part pointed out hereinafter.
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Brief Description of the Drawings
Fig. 1 is a semidiagrammatic perspective of
,an apparatus of this invention, showing parts in a
starting position, and further showing two plies of
material as they are applied to the loading means of
the apparatus;
Fig. 2 is a view similar to Fig. 1 showing
a stage of the loading operation wherein the leading
- ends of the plies are entered in the sewing machine
of the apparatus and the trailing ends of the plies
are entered in the control clamp of the apparatus;
Fig. 3 is a view similar to Fig. 2 showing
a further stage of the operation wherein the sewing
machine is about to start the sewing of the plies and
the loading means returned to starting position for
receiving the next assembly of plies to be seamed;
Fig. 4 is a semidiagrammatic perspective
showing certain components of the contour guide means
of the apparatus;
;.
Fig. 5 is a semidiagrammatic perspective
showing the control clamp of the apparatus and the
mounting means and operating means therefor;
Fig. 6 is a semidiagrammatic perspective
showing a first loading clamp of the apparatus and
its operating mechanism;
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Fig. 7 is a semidiagrammatic perspective,
viewed in the opposite direction from Fig. 1, showing
a second loading clamp of the apparatus and its
operating mechanism;
S Fig. 8 is a side elevation as viewed from
the right side of Fig. 1, with parts broken away and
parts omitted;
Fig.9 is a view showing part of the sewing
machine and part of the contour guide means of the
apparatus;
Fig. 10 is a plan showing parts of the con-
tour guide means;
Fig. 11 is a view in elevation on line 11-11
of Fig. 10, with parts broken away;
Fig. 12 is a vertical transverse section
showing parts of the contour guide means and also show-
ing a fork of the loading means of the apparatus;
Fig. 13 is a diagram of certain pneumatic
circuitry associated with the contour guide means of
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the apparatus;
Fig. 14 is a diagram of certain pneumatic
circuitry associated with the control clamp of the
apparatus; and
~ Fig. 15 is a diagram of certain pneumatic
; 25 circuitry associated with the loading means of the
apparatus;
Corresponding reference characters indicate
corresponding parts throughout the several views of
the drawings.
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Description of the Preferred Embodiments
Referring to the drawings, first more par-
ticularly to Figs. 1-3, there is generally indicated
at 1 apparatus of this invention for joining together
S two pieces or plies A and B of material, such as tex-
tile fabric. The apparatus generally comprises means
indicated at 3 for seaming the two plies together along
an edge thereof, more particularly a sewing machine,
having means indicated generally at 5 in Fig. 9. for
feeding the two plies therethrough in a predetermined
direction, which may be referred to as the direction
of feed. The apparatus further comprises contour guide
means indicated generally at 7 for shifting the plies
as they are fed forward by the feeding means 5 to ef-
fect contour seaming of the plies, i.e., edge seaming
of the plies with the edges along which they are seamed
~; generally in register and with the seam generally uni-
formly spaced from the edges (e.g., one-quarter inch
; from the edges). This contour guide means 7 may gen-
erally correspond to that shown in my Canadian patent
899,163, issued May 7, 1974.
In accordance with this invention, there is
provided means indicated generally at 9 for controlling
the feed of the plies A and B to the contour guide means
7 properly to present the plies to the contour guide
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means to avoid wrinkling of the pieces or other prob-
Lems (such as may otherwise result from the inertia
of the mass of the plies), and also to provide for seam
and equalization as will appear. This feed control
means 9 comprises a clamp 11, which may be referred to
as the feed control clamp, for clamping the plies A and
B as they are fed forward and shifting them generally to
maintain their edges to be seamed generally aligned with
the contour guide means 7, as will appear. The clamp 11
is biased in the direction away from the sewing machine
3 to maintain the plies under tension as they are fed
forward, as will also appear. Means indicated generally
at i' is provided mounting the clamp 11 for movemen'
with the plies as they are fed forward and also for
side-to-side movement relative to the direction of feed,
and means indicated generally at 15 is provided for
shifting the clamp 11 from side to side as it moves
forward generally to maintain the edges of the plies
aligned with the contour guide means. This shift means
15 is controlled by pneumatic sensor means 17 (see
Figs. 4, 9, 12 and 14) which senses the position of the
; edge of the plies A and B as they enter the contour
I guide means and signals the shift means to shift the
work clamp 11 in accordance with variation in the po-
sition of the edge relative to the sensors as the
pieces travel forward through the sensor.
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The apparatus 1 comprises a table 19 having
a top 21 (which may be made of sheet metal plate).
The top 21 has a flat horizontal forward portion 21a
and a curved rearward portion 21b, the latter being
curved on an arc centered in an axis indicated at 23
which extends transversely with respect to the table
below the plane of the horizontal top portion 21a of
the table and in a vertical plane which generally inter-
sects the rearward end of portion 21a. The latter ex-
tends forward from the upper forward end of the curvedpo~tion 21b tangentially with respect to the curved
portion. The term "forward" is employed in the sense
of downstream with respect to the direction of feed of
the plies A and B, and the term "rearward" is employed
in the sense of upstream. The sewing machine 3 is
~! mounted on the table in a cutout 24 at the fort~ard
right-hand corner of the horizontal forward portion 21a
of the table top, with the top of the bed of the machine
flush with 21a. The "right" and "left" sides of the
table top 21 are as viewed in forward (downstream) di-
rection. The sewing machine is a conventional machine
having the usual feed dogs such as indicated at 25 in
Fig. 9 for feeding work over the bed of the machine
and under its presser foot 27 for being stitched by
the needle N of the machine. It is arranged extending
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transversely with respect to the table top 21 and with
its throat opening toward the left side of the table.
The presser foot is adapted to be raised and lowered
in conventional manner by an air cylinder CF (see Fig. 15).
The contour guide means 7 for guiding the two
pieces A and B to effect contour seaming of the pieces
comprises a separator plate 31 (see Figs. 4, 9 and 12) and
upper and lower guide wheels 33 and 35 corresponding
generally to the separator plate 29 and upper and lower
guide wheels 61 and 151 of my Canadian patent 899,163.
This plate is located in a horizontal plane slightly
above the level of the horizontal forward portion
21a of the table top 21 at a rearward stepped por-
tion 24a of the cutout 24 at the right-hand forward
corner of portion 21a. The upper ply A of material
feeds over the plate 31 between the upper wheel 33 and
the plate, and the lower ply B of material feeds under
the plate between the lower wheel 35 and the plate.
Each wheel is mounted for rotation on a generally hor-
izontal axis and for swinging movement about a gener-
ally vertical axis offset from the wheel axis on the
rearward (upstreaml side of the wheel axis as in my
aforesaid Canadian patent 899,163. The upper wheel 33
is swingable about its vertical swing axis by means of
2~ an air cylinder 39 under control of a pneumatic edge
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sensor 41 for the upper ply A, and the lower wheel 35
is swingable about its vertical swing axis by means of
an air cylinder 43 under control of a pneumatic edge
sensor 45 for the lower ply B. Cylinders 39 and 43
5 correspond to cylinders 95 and 165 shown in said
Canadian patent 899,163, and sensors 41 and 45 cor-
respond to sensors 209 etc. and 219 etc. shown in said
patent.
The upper wheel 33 is mounted as indicated
at 47 to swing down from a raised retracted position
to grip the upper ply A and the lower wheel 35 is
similarly mounted as indicated at 49 to swing up from
a lowered position to grip the lower ply B. An air
cylinder CCl is provided for moving the wheel 33 up
and down, and an air cylinder CC2 is provided for
moving the wheel 35 up and down. The function of these
cylinders corresponds generally to the function of cyl- -
inder 193 of Canadian patent 899,163, The separator
plate 31 is pivoted as indicated at 51 for swinging move-
ment from the operative position between the wheels in
; which it is illustrated in solid lines in Fig. 9. to the
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retracted position off to the right in which it is illus-
trated in phantom in Fig. 9, and is adapted to be swung
~;~ between these positions by an air cylinder CG. Sensors
41 and 45 are carried by the separator plate 31 adjacent
k its forward (downstream) end. The pneumatic sensor means
~- 17 for controlling the shift means for the work clamp 11
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comprises a pneumatic edge sensor for both plies A
and B carried by the separator plate 31 adjacent its
rearward (upstream) end.
In the operation of the contour guide means
7, as the upper ply A is fed forward over the separator
plate 31 by the feed means 25 of the sewing machine 3,
the upper wheel 33 is held down in engagement with the
upper ply against the separator plate, and as the lower
ply B is fed forward under the separator plate by the
feed means 25, the lower wheel 35 is held up in engage-
ment with the lower ply against the bottom of the
separator plate. The upper pneumatic edge sensor 41
continuously senses the position of the edge of the
uyper ply A of r.,aterial relat~ve to the needle N of
the sewing machine as the plies are fed through the sew-
ing machine and acts via the cylinder 39 to swing the
upper wheel 33 to shift the upper ply A to maintain its
edge in predetermined spaced relation (e.g., one-quarter
inch) from the needle. Similarly, the lower pneumatic edge
sensor 45 continuously senses the position of the edge
of the lower pLy B of material relative to the needle N
as the plies are fed through the sewing machine and
acts via the cylinder 43 to swing the lower wheel 35 to
shift the lower ply to maintain its edge in predetermined
spaced relation (e.g., one-quarter inch) from the needle.
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At 61 is generally indicated loading means
which is adapted, while one assembly of plies A and B
is being seamed (i.e., while this assembly is being
~Eed through the sewing machine 3 and stitched) to re-
S ceive the next assembly of plies A and B to be seamed
and, upon completion of seaming the first assembly, to
enter the next assembly in the sewing machine and in
the control clamp 11. The clamp 11 is adapted to clamp
the plies A and B at their trailing ends and the load-
ing means 61 is movable to enter the trailing ends of
the plies in the control clamp while the latter is at ~-
rest in the starting position in which it is illus- -
trated in Fig. 1.
The mounting means 13 for clamp 11 comprises
an arm 63 pivoted for swinging movement on the axis 23
~; at the center of curvature of the curved section 21b
i of table top 21. This arm extends up from its pivot
at 23 on the right-hand side of the table [as viewed
~- in forward (downstream)direction] slightly beyond the
right-hand edge of the table top 21. A bar 65 extends
'` at right angles to the arm over the table top 21 from
the right side of the table top toward the left~ This
bar 65 is a fixed bar of a four-bar linkage 67 (see
Figs. 1-3 and 5) carrying the clamp 11. This link-
age comprises left and right side bars 69 and 71 pin-
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connected as indicated at 73 at their rearward ends to
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the bar 65 and extending forward therefrom, and a
forward bar 75 pin-connected at its ends as indicated
a,t 77 to the forward ends of the side bars. The
clamp 11 comprises a lower jaw 79 fixed to bar 75 and
e~xtending forward therefrom and an upper jaw 81
pivoted at 83 on the bar 75 and operable by an air
cylinder CI pivoted at 87 on an extension 89 of the
lower jaw 79. r~eans indicated generally at 91 is
provided for swinging the right side bar 71 from
side to side for shifting the bar 75 and the clamp
jaws 79 and 81 from side to side relative to the
table. Pins 77 are spaced a distance less than pins
73, causing the bar 75 to angle as it shifts from
side to side in such manner as to maintain jaws 79
and 81 directed generally toward the needle N of the
sewing machine 3.
The arm 63 has a weight 93 (see Figs. 1-3
and 8) at its lower end below the pivot 23 and
so located relative to the pivot 23 as to bias the
arm to tend to swing downward (counterclockwise as
viewed in Figs. 1-3 and 8)thereby tending to swing
the clamp 11 rearward away from the sewing machine for
tensioning the plies being sewn, as will appear. It
is adapted to be held against swinging downward in its
aforesaid starting position of Figs. 1 and 8 by
means indicated generally at 95, and shown as compris-
ing a latch 97 and an air cylinder CJl for operating
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the latch. The latter, when in its operative position,
is engageable by the lower end of the arm (see Fig. 8)
to hold the arm from swinging downward past its start- ~-
ing position under the bias of the weight 93. When
the latch is retracted (pulled downward) by the cyl-
inder, the arm is freed to swing down (i.e., to swing
counterclockwise as viewed in Fig. 8) from its start-
ing position.
The means 91 for swinging the bar 71 from
side to side to shift the control clamp jaws 79 and 81
from side to side comprises an air cylinder 101 carried
by a bracket 103 on the arm 63 adjacent the lower end
of the arm, and a linkage 105 interconnecting the pis-
ton rod 107 of cylinder 101 and the bar 71. This lin~-
age comprises a bell crank 109 pivoted at Lll on the
arm 63 adjacent its upper end, a link 113 interconnect- -
' ing piston rod 107 and one arm of the bell crank and a
link 115 interconnecting the other arm of the bell
crank and bar 71. The arrangement is such that when
the piston rod 107 of the cylinder 101 is retracted,
the bar 71 is swung to the right`, and when the piston
`~ rod is extended, bar 71 is swung to the left.
The loading means 61 (see Figs. 1-3 and 6~
comprises a first loading clamp 117 for clamping the
plies A and B at their leading ends and a second load-
ing clamp 119 ~see Figs. 1-3 and 7) for clamping the
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plies away from their leading ends, and more particu-
larly for clamping the plies adjacent their trailing
ends. The first loading clamp 117 is movable laterally
from a retracted ply-receiving position at the left of
the sewing machine 3 (in which it is shown in Fig. 13
to enter the plies in the sewing machine and in the con-
tour guide means 7, as will appear. The second loading
clamp 119 is movable laterally and rearwardly from a re-
tracted ply-receiving position rearward of the first
loading clamp (in which it is shown in Fig. 1) to enter
the trailing ends of the plies A and B in the clamp 11,
as will appear.
The first loading clamp 117 (which may also
be referred to as the forward loading clamp) is carried
by a carriage 121 constituted by a tubular slide member
; slidable on a guide rod 123 extending transversely over
the horizontal forward portion 21a of the table top 21
adjacent its forward end (and somewhat forward of the
sewing machine 3). Rod 123 is carried by a frame
structure such as indicated at 125 supported by the
~ table. Clamp 117 comprises a lower jaw 127 extending
,~; rearward from the carriage 121 and fixed to the car-
riage, and an upper jaw 129 pivoted at 131 on the lower
jaw for swinging movement between an open and a closed
` 25 position. The lower jaw 127 has a forward extension 133
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carrying a head 135 in slidable engagement with a bar
137 for preventing rotation of the carriage 121 on the
rod 123 and holding the lower jaw horizontal. An air
cylinder CB carried by the frame 125 has its piston rod
139 pinned at 141 to the lower jaw extension 133 to
slide the carriage lengthwise along the rod 123 and
thus move the clamp 117 laterally over the table top 21
adjacent its forward end. An air cylinder CA pinned
at 143 on a post 145 extending up from the lower jaw
127 has its piston rod connected at 147 to the upper jaw
129 for swinging the latter open and closed. A fork 149
for separating the two plies A and B of materlal is pro-
vided at the rearward end of the lower jaw 127. The
for~ comprises a me'al strip bent at 150 to narrow ~J-
shape and mounted in horizontal position on a rod 151
extending rearward from the lower jaw so as to have an
i upper tine 153 and a lower tine 155, the rod 151 ex-
tending between these tines. The fork extends trans-
versel~ of the lower jaw 127 at its rearward end with
the open end of the fork directed toward the right.
The fork 149 is aligned transversely of the apparatus
with the separator plate 31 and is located slightly
a~ove the table top 21 in position to straddle the
separator plate (as shown in Fig. 12) when the clamp
117 is moved to the right from its retracted position
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of Fig. 1 to enter the leading ends of the plies A
and B in the sewing machine (on the bed of the machine
under its presser foot). Thus, with ply A on top of
the fork and ply B on the bottom of the fork, ply A is
brought into position on top of the separator plate 31
and below the upper guide wheel 33 of the contour guide
means, and ply B is brought into position on the bottom
of the separator plate and above the lower guide wheel
35 of the contour guide means, wheel 33 being raised
and wheel 35 being lowered by their respective retrac-
tion cylinders CCl and CC2 for such positioning of the
plies.
The second or rearward loading clamp 119 is
carried by a carriaSs 161 (see Figs. 1-3 and 7) mov-
able transversely relative to the table top 21 on the
upper crossbar 163 of an inverted U-shaped frame 165
pivoted for swinging movement on the axis 23. The side
arms of this frame are each designated 167; they extend
up from the axis 23 on the right and left sides of the
table top 21. Crossbar 163 extends between the upper
ends of the arms 167 above the table top. An air cyl-
inder CE (see Fig. 8) is provided for swinging the
frame 165 to move the crossbar 163 forward and rearward
over the table top between the forward position in
which it is illustrated in Fig. 1 and the rearward
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position in which it is illustrated in Fig. 2. The
c:arriage 161 comprises a pair of tubular slide members
169 slidable on a pair of guide rods 171 extending
transversely of the apparatus and lengthwise of the
crossbar 163 below the latter between a pair of sup-
ports 173 extending down from the crossbar. An air
cylinder CH is provided for sliding the carriage 161
on the rods 171 between the retracted position in
which it is illustrated in Fig. 1 and the advanced
position in which it is illustrated in Fig. 2. The
clamp 119 comprises a lower jaw 175 extending forward
from the carriage 161 and a pair of clamping pads 177
on the lower ends of the piston rods 179 of air cyl-
inde~Y CDl and C~2 carried by a bracket 181 extending
forward from the carriage 161 above the lower jaw 175.
With the piston rod CER of cylinder CE re-
i tracted, the frame 165 occupies its forward or start-
ing position of Figs. 1 and 8. With the piston
rod CHR of cylinder CH extended, the carriage 161
occupies its retracted starting position of Figs. 1
and 7, toward the left side of the table top.
With the frame 165 in its starting position and the
carriage 161 in its starting position, the rearward
loading clamp 119 occupies a starting position gen-
erally in line with and rearward of the forward load-
ing clamp 117 (in its retracted position toward the
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left side of the table top) to the left and forward
of the control clamp 11 in its starting position.
On extension of piston rod CER of cylinder CE and re-
traction of piston rod CHR of cylinder CH, the frame
165 swings rearward to carry clamp 119 rearward and
the clamp 119 moves to the right as it moves rear-
ward, bringing it over laterally and downwardly to
the clamp 11 directly in front of the latter.
Referring to Fig. 15, the apparatus
is shown as having valves VA, VB, VC, VD, VE, VF
VG, VH, VI and VJ for controlling the cylinders CA, CB,
CCl and CC2, CDl and CD2, CE, CF, CG, CH, CI and CJl,
respectively. Each of these valves is of the type hav-
ing an inlet for air under pressure (indicated by an
arrow) and a spool (not shown) shiftable by an air-
operated actuator at the right to direct air under
pressure from the inlet to a port~a and to connect a
port _ to atmosphere, and shiftable by an air-operated
actuator at the left to direct air under pressure from
the inlet to _ and to connect a to atmosphere. Actuators
designated AR are of a type which reset automatically
after they have been actuated by air pressure. Actua-
tors designated AS are of a type which delay actuation
until air pressure has beèn built up to a predetermined
value, and then snap. All the other actuators are of
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the type which operate without delay a~d without re-
set on actuation by air pressure. A cylinder CJ2
i-or operating a clutch 183 for the sewing machine 3
is interconnected with cylinder CJl for conjoint
operation with cylinder CJl under control of valve VJ.
All the cylinders CA - CJ2 are double-acting air
cylinders.
Valve VA controls the cylinder CA for actuat-
ing the upper jaw 129 of the first or forward loading
clamp 117, and is itself controlled by a line 201 in-
cluding a valve 203 connected between a compressed air
source and the right-hand acutator of valve VA. Valve
203 is illustrated as a manually operable push-button
valve which when actuated supplies air to the right-hand
actuator of valve VA and when deactuated vents said
right-hand actuator. Valve VA is further controlled by
a line 205 including a valve 207 connected between the
compressed air source and the left-hand actuator of
valve VA. Valve 207 is illustrated as a push-button
valve which when actuated supplies air to the left-hand
actuator of valve VA and when deactuated vents said
left-hand actuator. It is actuated by the forward
~ loading clamp carriage 121 as the latter reaches the
- end of its stroke toward the right, i.e., when the
forward loading clamp 117 enters the leading ends of
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the Plies A and B in the sewing machine and brings ply
P~ into position on top of the separator plate 31 and
ply B into position on the bottom of the separator
plate. A line 209 interconnects port a of valve VA and
the rear end of cylinder CA and a line 211 interconnects
port b of valve VA and the forward end of cylinder CA.
Valve VB controls the cylinder CB for driving
the forward loading clamp carriage 121, and is itself
controlled by a line 213 connected to its right-hand
actuator, this line 213 being connected to a line 215
which interconnects port a of valve VD and the rear ends
of cylinders CDl and CD2. Valve VB is further controlled
by a line 217 interconnected between line 205 and the
left-hand actuator of valve VB, whereby the ieft-hand
actuator of valve VB i5 under control of the aforesaid
valve 207. Line 217 includes a flow control 219 for
delayed action of the left-hand actuator of valve VB on
actuation of valve 207. A line 221 interconnects port a
of valve VB and the rear end of cylinder CB, and a line
223 interconnects port b of valve VB and the forward end
. of cylinder CB.
Valve VC controls the cylinders CCl and CC2
for raising and lowering the top and bottom guide
wheels 33 and 35, and is itself controlled by a line 225
connected to its right-hand actuator, this line 225 be-
ing connected to a line 227 which interconnects port a
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of v~lve VF and the rear end of cylinder CF. Valve VC
is further controlled by a line 229 connected to its
lleft-hand actuator and to a line 231 which interconnects
port _ of valve VG and the rearward end of cylinder CG.
5 A line 233 interconnects port a of valve VC and the rear
ends of cylinders CCl and CC2 and a line 235 intercon-
nects port _ of valve VC and the forward ends of cyl-
inders CCl and CC2.
Valve VD controls the rearward loading clamp
cylinders CDl and CD2, and is itself controlled by a
line 237 connected to its right-hand actuator, this
line 237 including a valve 239 and being interconnected
between the compressed air source and the right-hand
actua~or of valve V~ as shown in Fig. 15. Valve 239
is illustrated as a push-button valve which when
actuated supplies air to the right-hand actuatar of
valve VD and when deactuated vents said actuator. It
may be manually actuated, or actuated by means which
senses the proper positioning of work in the rearward
loading clamp 119. Valve VD is further controlled by
a line 241 connected to its left-hand actuator and to
a line 243 which interconnects port a of valve VI and
the rear end of cylinder CI. A line 245 interconnects
port b of valve VD and the forward ends of cylinders
CDl ar,d CD2.
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Valve VE controls cylinder CE for swinging
the frame 165 which carries the rearward loading clamp
].19, and is itself controlled by a line 247 connected
t:o its right-hand actuator and a line 249 connected to
i.ts left-hand actuator. Line 247 is connected to a
line 251 which interconnects port a of valve VH and
the forward end of cylinder CH, and line 249 is con-
nected to a line 253 which interconnects port b of
valve VH and the rear end of cylinder CH. I.ines 255
and 257 interconnect ports a and _ of valve VE with
the rear and forward ends, respectively, of cylinder CE.
Valve VF controls cylinder CF for the presser
foot of the sewing machine, and is itself controlled by
. a lire 259 interc.onr.ecting its right-hand actuator and
15 line 211, and by a line 261 connected to a line 263
which interconnects port b of valve VJ and the rear-
, ward end o cylinder CJl and the forward end of cyl-
inder CJ2. A line 265 interconnects port b of valve
.; VF and the forward end of cylinder CF.
~ 20 Valve VG controls cylinder CG for the separ-
.~ ator plate 31, and is itself controlled by a line 267
connected to its right-hand actuator and line 261, and
by a line 269 including a valve 271, this line 269 be-
~
-: ing interconnected between the compressed air source
~ 25 and the left-hand actuator of valve VG. Valve 271 is
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illustrated as a push-button valve which when actuated
supplies air to the left-hand actuator of valve VG and
when deactuated vents said actuator. Valve 271 is
actuated by the arm 63 which carries the work clamp 11
when the work clamp 11, in being pulled up and forward
by the work, approaches the contour guide means 7. A
line 273 interconnects port a of valve VG and the rear
end of cylinder CG.
Valve VH controls cylinder CH for driving the
rearward loading clamp carriage 169, and is itself con-
trolled by a line 275 connected to its right-hand
actuator and line 213, and by a line 277 connected to
its left-hand actuator and line 245.
Valve VI controls cylinder CI for the work
clamp 11, and is itself controlled by a line 279 in-
cluding two valves 281 and 283 in series, this line 279
being interconnected between the compressed air source
and the right-hand actuator of valve VI. Each of
valves 281 and 283 is illustrated as a push-button
valve which when actuated is adapted to deliver air
from the source and when deactuated to vent the line
downstream from the valve. Valve 281 is adapted for
actuation by the frame 165 carrying the rearward load-
ing clamp 119 when the latter reaches the upper end
of its upward stroke (i.e., when the piston rod of
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l~SlZ76
cylinder CE reaches its retracted position). Valve
283 is adapted for actuation by carriage 169 carry-
ing the rearward loading clamp 119 when the latter
reaches the end of its traverse to the right (i.e.,
when the piston rod of cylinder CH reaches its ex-
t:ended position). When both valves 281 and 283 are
actuated, air is supplied to the right-hand actuator
of valve VI, and when valve 283 is deactuated, this
actuator is vented. Valve VI is further controlled
by a line 285 including a valve 287, this line 285
being interconnected between the compressed air
source and the left-hand actuator of valve VI. Valve
287 is illustrated as a push-button valve which when
actuated supplies air to the left-hand actuator of
valve VI and when deactuated vents said actuator.
Valve 287 is adapted for actuation by the arm 63
which carries the work clamp 11 when the work clamp,
in being pulled forward by the work, passes by the
contour guide means 7 and approaches thç presser
foot 27 of the sewing machine 3. A line 289 inter-
connects port b of valve VI and the forward end of
cylinder CI.
Valve VJ controls the cylinders CJl and
CJ2, and is itself controlled by a line 291 inter-
connected between its right-hand actuator and line
257, and a line 293 interconnected between its left-
hand actuator and lines 285. Lines 291 and 293 in-
clude suitable conventional pneu~atic delays 295 and
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105~;~7t;
297, respectively. A line 299 interconn~cts port a
of valve VJ with the forward end of cylinder CJl and
the rearward end of cylinder C~2.
Referring to Fig. 13, the pneumatic edge
sensor 41 for the upper ply A is shown to comprise
a nozzle 301 through which a stream of air is directed
downward toward the inlet 303 of an upper air passage
305 in the separator plate 31. Cylinder 39 of the
contour guide means 7 has ports 307 and 309. The
supply of air to these ports is controlled by an air
proportioning device 311, corresponding to the device
designated 247 in U.S. patent 3,636,898, which is it-
self controlled by the sensor 41, as in said patent.
Similarly, the pneu~atic edge sensor 45 for the lower
ply is show~ to comprise a nozzle 313 through which a
stream of air is directed upwardly toward the inlet
315 of a lower air passage 317 in the separator plate
31. Cylinder 43 on the contour guide means has ports
319 and 321. The supply of air to these ports is con-
trolled by an air proportioning device 323, the same
as 311. Reference may be made to U.S. patent 3,636,898
for a complete description of the operation of the
sensors and the air proportioning devices to operate
cylinders 39 and 43 to swing the wheels 33 and 35 to
effect contour seaming of the plies A and B.
27
lOSl'Z7~
Referring to Fig. 14, the pneumatic edge
sensor 17 carried by the separator plate 31 adjacent
its rearward end comprises an air nozzle 325 posi-
tioned to direct a continuous stream of air downward
toward an air inlet 327. The nozzle is mounted on
top of the separator plate and the inlet is mounted
on the bottom of the plate projecting outwardly be-
yond the edge of the plate at a cutout 329 in the
plate, the arrangement being such as to provide a
gap G between the lower end of the nozzle and the
upper end of the inlet for passage of the plies A
and B between the lower end of the nozzle and the
upper end of the inlet. Cylinder 101 has portS 331
and 333 for admission of air to and venting of air
from opposite sides of its piston 335. Supply of
air to these ports is under control of an air pro-
portioning device 337 of the same type as indicated
at 247 and 249 in U.S. patent 3,636,898. This de-
vice is supplied with air from the compressed air
source via a line 339 including a flow regulator
341. At 343 is indicated a control pressure line
connected to the proportioning device, and at 345
is indicated a line connecting the inlet 327 and the
air proportioning device.
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Air pressure in line 345 varies in accord-
ance with the opening or closing of the inlet 327 by
the edge of ply A or ply B as they travel forward to-
w~ard the edge 347 of the separator plate 31 at the cut-
out 329. Ply A then travels over and ply B then travels
under the plate toward the guide wheels 33 and 35. The
normal position of the edge of either ply as it travels
through the gap G may be considered as the position in
which the edge portion of the ply halfway closes off
the inlet 327. Under these circumstances, the air
pressures in cylinder 101 on opposite sides of the
piston 335 are balanced by the air proportioning de-
vice 337. If the edge portion should in effect
shift to the right (as viewed in downstream direc-
tion), it will close off the inlet and decrease the
: admission of air to the inlet, with the result that
the pressure in line 345 drops. The air proportion-
ing device 337 thereupon functions to increase the
pressure in port 333 and decrease the pressure in
port 331 with the result that the piston rod 107 is
extended to shift the clamp 11 to the left to bring
the edge of the work back to the normal position (bi-
secting the inlet). If the edge portion should in
effect shift to the left, it will open up the inlet
further and increase the admission of air to the in-
let with the result that the pressure in line 345
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increases. The air proportioning device 337 thereupon
functions to increase the pressure in port 331 and de-
crease the pressure in port 333 with the result that
ths piston rod 107 is retracted to shift the clamp 11
to the right to bring the edge of the work back to the
normal position.
At the start of a cycle of operation, the
sewing machine 3 is stopped and its presser foot 27
is raised. The separator plate 31 of the contour guide
means 7 is in its operative position. The upper wheel
33 of the contour guide means is raised and the lower
wheel 35 is lowered. The first or forward loading
cl~mp 117 is in its retracted ply-receiving position
at the left of the table top 21 and is open, ready to
receive work, as shown in Fig. 1. The second or rear-
ward loading clamp 119 is in its forward position, the
piston rod of cylinder CE being retracted, and in its
retracted ply-receiving position at the left of the
table top 21 (see particularly Fig. 1). Clamp 119
is also open, ready to receive work. The control
clamp 11 is in its starting position as determined by
arm 63 being latched in starting position by the
latch 97.
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~051276
The operator takes the two plies A and B
w~hich are to be sewn together, and with ply A on top
of ply B, places the leading end of the two plies
in the forward loading clamp 117 (which is open). In
doing so, she places ply ~ on top of the fork 149
(i.e., on top of the upper tine 153 of the fork) and
ply B on the bottom of the fork (i.e., on the bottom
of the lower tine 155). She also makes certain that
the leading ends o$ the plies are matched, as she
places them on the lower jaw 127 of the clamp 117,
and under its upper jaw 129 (which is open). She
then actuates the valve 203 (i.e., pushes its button).
On actuation of valve 203 (which could ~e effected
automatically by sensors in jaw 127 sensing the entry
of the leading ends of the work in proper position in
clamp 117 instead of manually), valve VA is actuated
to deliver air under pressure via line 209 to the
rearward end of cylinder CA and to vent air from the
forward end of cylinder CA via line 211. The piston
rod of cylinder CA is thereby extended to close the
jaw 129 of clamp 117 and clamp the leading ends of
the plies ~etween these jaws.
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lOS1276
~aving effected the clamping of the leading
ends of the plies A and B by the forward loading clamp,
the operator places the trailing ends of the plies in
the rearward loading clamp 119, making certain that
they are matched. This placement is effected by match-
ing the trailing ends of the plies and placing them on
the lower jaw 175 of clamp 119, under the clamping pads
177. The operator then actuates valve 239 (i.e., she
pushes its button). On acutation of valve 239 (which
could be effected automatically by sensors in jaw 175
sensing the entry of the trailing ends of the work in
proper position in clamp 119 instead of manually),
valve VD is actuated to deliver air under p-essure via
line 215 to the rearward ends of the clamp cylinders
CDl and CD2 (which are their upper ends as viewed in
Fig. 7 and their lower ends as viewed in Fig. 15) and -~
to vent the piston rod ends of these cylinders via
line 245. The piston rods 179 of cylinders CDl and
CD2 are thereby extended so that the pads 177 on the
lower ends of the piston rods clamp the trailing ends
of the plies down against the lower jaw 175.
Air under pressure is delivered from line 215
via line 213 to the right-hand actuator of valve VB,
- thereby actuating valve VB to deliver air pressure via
line 221 to the rearward end of cylinder CB and to vent
the forward (rod) end of cylinder CB via line 223. The
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1~5~;~76
piston rod 139 of cylinder CB is thereupon extended
to slide the carriage 121 and clamp 117 from their
retracted ply-receiving position at the left of the
table top toward the right. The clamp 117, carrying
S the leading ends of plies A and B with it, with ply
A on top of the fork and ply B under the for~, is
traversed to the right, and brings the leading ends
of the plies over the bed of the sewing machine 3
under the presser foot 27 of the sewing machine.
The fork 149, travelling with the clamp 117, straddles
the separator plate 31, i.e., its upper tine 153 comes
over and its lower tine comes under the separator
plate. This brings the uppe~ ply A on too of the
separator plate under the upper guide wheel 33 and the
lower ply on the bottom of the separator plate above
the lower guide wheel 35.
Air under pressure is also delivered from
line ~13 via line 275 to the right-hand actuator of
valve VH, thereby actuating valve VH to deliver air
pressure via line 251 to the forward end of cylinder
CH and to vent the rearward end of cylinder CH via
e 253. The piston rod of cylinder CH is thereupon
retracted to slide the carriage 161 and the rearward
loading clamp 119 (now closed) from the retracted
:~ 25 ply-receiving position at the left of the table top
33
lOSl;~'7~ ~
toward the right. The clamp 119, carrying the trail-
ing ends of plies A and B with it, is thus traversed
to the right, maintaining clamp 119 generally in line
with clamp 117 as they both move over to the right.
Air under pressure is delivered from line
251 via line 247 to the right-hand actuator of valve
VE, there~y actuating valve VE to deliver air pressure
via line 255 to the rearward end of cylinder CE and
to vent the forward end of cylinder CE via line 257.
The piston rod CER of cylinder CE is thereupon ex-
tended to swing the frame 165 down, thereby carrying
the rearward work clamp 119 rearward as it traverses
from left to ri~ht. The trailing ends of the plies A
< and B, clamped in claim 119, are thus brought rearward
,, 15 and to the right and entered in the work clamp 11
(which is open) as shown in Figs 1 and 2, clamp 11
being so positioned as to receive said trailing ends.
As the carriage 121 and clamp 117 reach the
end of their traverse to the right (with the accompany-
ing entry of the leading ends of plies A and B in the
sewing machine 3 and in the contour guide means 7)
valve 207 is actuated. This results in delivery of air
via line 205 to the left-hand actuator of valve VA,
thereby actuating valve VA to deliver air via line 211
`~ 25 to the forward end of cylinder CA and to vent air from
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~()SlZ76
the rearward end of cylinder CA. The piston rod
of cylinder CA is thereupon retracted to open clamp
117 by swinging up its upper jaw 1~9 for releasing
1:he leading ends of the plies.
Air under pressure is delivered from line
211 via line 259 to the right-hand actuator of valve
VF, thereby actuating valve VF to deliver air under
pressure via line 227 to the rearward end of cylinder
CF and to vent the forward end of cylinder CF via
line 265. The piston rod of cylinder CF is thereupon ;
extended to lower the presser foot 27 to clamp the
~ leading ends of the plies down against the bed of
; the sewing machine in preparation for the start of
sewing.
~; 15 Air under pressure is delivered from line
... .
227 via line 225 to the right-hand actuator of valve
VC, thereby actuating valve VC to deliver air under
- pressure via line 233 to the rearward ends of cyl-
,~.
inders CCl and CC2 and to vent the forward ends of
these cylinders via line 235. The piston rods of
.;. .
cylinders CCl and CC2 are thereby extended to lower
~ the upper guide wheel 33 into engagement with the
,~ upper ply A on top of the separator plate 31 and to
~. -
,t,, raise the lower guide wheel 35 into engagement with
~ 25 the lower ply B on the bottom of the separator plate.
r
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lV51~7~
Air is delivered from line 205 via line 219
to the left-hand actuator of valve VB after a relatively
short time delay introduced by the flow control 219,
thereby actuating valve VB to deliver air via line 223
to the forward end of cylinder CB and to vent the rear-
ward end of cylinder CB via line 221. The piston rod ~
of cylinder CB is thereupon retracted to pull the :
clamp 117 (now open) back to its retracted position at
the left of the table top, leaving the leadlng ends of
plies A and B clamped down by the presser foot 27 of
the sewing machine and by the wheels 33 and 35 in the
contour guide means 7.
As the rearward loading clamp 119 reaches the -
end of its traverse toward the right, valve 283 is
; 15 actuated and, since valve 281 is in its actuated condi-
' tion as a result of frame 165 being in its forward posi-
tion, air is delivered via line 279 to the right-hand
actuator of valve VI. This sets valve VI to deliver
air under pressure via line 243 to the rearward end of
. 20 cylinder CI and to vent the forward end of this cyl-
. .
.- inder via line 289. The piston rod of cylinder CI
is thereby extended to swing the upper jaw 81 of the
work clamp 11 down to clamp the trailing ends of plies
A and B against the lower jaw 79 of the work clamp.
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lQS1~76
Air is delivered from line 243 via line 241
to the left-hand actuator of valve VD. This resets
valve vD to deliver air via line 245 to the forward
ends of cylinders CDl and CD2 and to vent their rear-
ward ends, thereby retracting their piston rods 17~
to raise the pads 177 and release the trailing ends
of the plies, thus opening clamp 119 to enable its
retraction.
Air is delivered from line 245 via line 277
to the left-hand actuator of valve VH. This sets valve
VH to deliver air via line 253 to the rearward end of
cylinder CH and to vent the forward end of this cyl-
inder, thereby extending the piston rod C~R of this `
cylinder to traverse carriage 161 and the rearward
loading clamp 119 (now open) back to the left.
i Air is delivered from line 253 via line 249
to the left-hand actuator of valve VE. This sets
valve VE to deliver air via line 257 to the forward
: end of cylinder CE and to vent the rearward end of
this cylinder, thereby retracting the piston rod
. of cylinder CE to pull the frame 165 carrying the
- rearward loading clamp 119 back up to its starting
position of Fig. 1 (and Pig. 8).
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lOS~Z76
Air is delivered from line 257 via line 291
including the time delay 295 to the right-hand actuator
of valve VJ. This sets valve VJ to deliver air via line
299 to the forward end of cylinder CJl and to the rear-
ward end of cylinder CJ2, and to vent air via line 263
from the rearward end of cylinder CJl and the ~orward
end of cylinder CJ2. The piston rod of cylinder CJl
is thereupon retracted to retract the latch 97 and the
piston rod of cylinder CJ2 is retracted to actuate the
clutch for starting the sewing machine 3 in operation.
With the sewing machine in operation, its
feed dogs 25 feed the plies A and B through the sew-
ing machine under the presser foot 27 for being
stitched together along their right-hand edge by the
needle N. As the plies A and B are fed forward, their
' trailing ends remain clamped in the work clamp 11 and
the plies pull the work clamp up in an arcuate path
above the curved portion 21b of the table top centered
in the axis 23 via the swinging of arm 63 on this axis.
With the weight 93 on the lower end of the arm 63 bias-
ing the arm 63 to swing downward, the work clamp 11 is
in effect biased rearward with the result that the
plies are fed forward through the sewing machine under
tension, as is desirable. The pneumatic edge sensor 17
senses the position of the right-hand edges of the plies
.
38
" .
1051~7~;
as they enter the contour guide means (some distance
upstream from the guide wheels 33 and 35 and pneumatic
edge sensors 41 and 45) and acts via the air propor-
tioning device 337, cylinder 101 and linkage 105 to
shift the work clamp 11 from side-to-side generally
to align the edges of the plies with the wheels 33 and
35 and sensors 41 and 45 of the contour guide means as :
the plies enter the contour guide means. With the right-
hand edges of the plies A and B passing over and under
the separator plate 31 generally aligned with the wheels
33 and 35, the plies are properly presented to the wheels
to avoid wrinkling of the plies or other problems such
as might otherwise result from the inertia of the mass
of the plies.
; lS As the work clamp 11 approaches the separator
~i plate 31 of the contour guide means 7, the arm 63
actuates valve 271, resulting in delivery of air via
line 269 to the left-hand actuator of valve VG. This
resets valve VG to deliver air via line 231 to the rear-
ward end of cylinder CG and to vent the forward end of
this cylinder via line 273. The piston rod of cylinder
CG is thereupon retracted to swing the separator plate
; off to the right to its retracted position clear of the
oncoming work clamp 11.
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39
. :
i~)Si;~7~
Air is delivered from line 231 via line 229
to the left-hand actuator of valve VC, resetting this
valve to deliver air via line 233 to the rearward side
c>f cylinders CCl and CC2 and to vent the forward ends
of these cylinders via line 235. The piston rods of
cylinders CCl and CC2 are thereupon retracted to raise
the upper guide wheel 33 and lower the lower guide wheel
35 to clear the way for the oncoming work clamp 11.
The work clamp 11, clamping the trailing ends
of the plies A and B with these ends matched, continues
its forward movement (under the pull of the plies A and
B resulting from the feed of the plies through the sew-
ing machine by the feed dogs) and travels on to a point
where the forward end of the clamp is closely adjacent
the presser foot of the sewing machine. At this point,
valve 287 is actuated by the arm 63 (which carries the
clamp 11), resulting in delivery of air via line 285
to the left-hand actuator of valve VI and also to the
~ left-hand actuator of valve VJ via line 293 including
- 20 the time-delay means 297. This resets valve VI to de-
- liver air via line 289 to the forward end of cylinder
Cl and to vent the rearward end of this cylinder via
line 243. The piston rod of cylinder Cl is thereupon
retracted to open the work clamp 11 (by swinging up
i~s movable upper jaw 81), releasing the trailing ends
~1
I
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` 40
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l()S1~76
of the plies A and B so that they may be fed on
through the sewing machine and sewn to the very end.
After the delay imposed by means 297, valve VJ is re-
set to deliver air via line 263 to ~he rearward end
oi- cylinder CJl and the forward end of cylinder CJ2,
and to vent the forward end of cylinder CJl and the
rearward end of cylinder CJ2 via line 299. This ex-
tends the piston rod of cylinder CJl to reset the
latch 97 ana retracts the piston rod of cylinder CJ2
to deactuate the clutch to stop the sewing operation.
Upon opening of the work clamp 11 and the release of
the trailing ends of the plies A and B, the arm 63
carr~ing the wor~ clamp swings back down to the start-
ing position and is re-latched by the latch 97. Air
is delivered from line 263 via lines 261 and 267 to
the right-hand actuator of valve VG. This sets valve
VG to deliver air via line 273 to the rearward end of
cylinder CG and to vent its forward end via line 231.
The piston rod of cylinder CG is thereupon extended
to return the separator plate 31 to its operative
position. Air is also delivered via line 261 to the
left-hand actuator of valve VF, thereby actuating valve
VF to deliver air under pressure via line 265 to the
forward end of cylinder CF and to vent the rearward
end of cylinder CF via line 227. The piston rod of
- 4 1 -
7~;
cylinder CF is thereupon retracted to raise the presser
foot 27. This completes the resetting of the various
components to their starting position ready for the next
cycle of operation.
It will be observed that when the leading
ends of the assembly of plies A and B have been entered
in the sewing machine and the trailing ends of the plies
have been clamped in the work clamp 11 to start a sewing
operation on the plies, the first or forward loading
clamp 117 opens and returns to its Fig. 1 starting po-
sition at the left of the apparatus, and the second or
rearward loading clamp 119 opens and returns to its
Fig 1 starting position. Thus, while the stated as-
sembly of plies is being sewn, the next assembly of
plies to be sewn may be loaded into the loading means
61, by placement of the leading ends of the plies of this
next pair in clamp 117 and operation of valve 203 to
close clamp 117, and by placement of the trailing ends
of the plies of this next pair in clamp 119. Then, as
the sewing of the first-stated assembly is completed,
valve 239 may be actuated to start the cycle of opera-
~ tion on said next assembly involving its entry at its
-~ leading end in the sewing machine and at its trailing
end in the control clamp 11 and the feeding thereof
through the sewing machine with contour guidance for
contour seaming.
- 4a -
76
In view of the above, it will be seen
that the several objects of the invention are
a~chieved and other advantageous results attained.
As various changes could be made in the
above constructions without departing from the scope
of the invention, it is intended that all matter
contained in the above description or shown in the
accompanying drawings shall be interpreted as illus-
trative and not in a limiting sense.
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