FIELD OF THE INVENTION
The present invention relates to a yarn splicing device for textile machines.
Particularly the invention relates to a splicing device for yarn winding
arrangement of textile machines like cone winding, cheese winding and airjet
spinning machines.
BACKGROUND OF THE INVENTION
In textile yarn 'winding machines, yarn tends to break frequently and the said
broken yarn is spliced together by means of splicer device provided in each
station of the yarn winding machine. Normally after yarn break in the winding
machine, the cone or cheese package running over the winding drum is
stopped. An individual top suction arm provided in each station of the yarn
winding machine is actuated to pick the tail yarn end from the package.
Simultaneously, another bottom suction arm or gripper arm provided in each
winding station is configured to pick the bottom yarn end from the cop in
unwinding station. Both the top suction arm and gripper arm places the
picked yarn end inside the splicing chamber of the splicer (air splicer) for
joining the yarn ends by means of compressed air. Once the splicing process is completed, the winding drum is restarted and the yarn is released from the
splicer to continue the normal winding operation.
In the yarn winding machines, the splicer is normally placed in the position of
regular yarn running path. During the splicing operation, the yarn is placed
inside the splicer by the top suction arm and gripper arm. After the completion
of splicing operation, the yarn returns to the regular running path. The return of the yarn to the regular running direction is ensured by the yarn monitoring
sénsor provided in a yarn clearer.
In known splicing arrangements of the yarn winding machines, splicer
comprises of top & bottom yarn holders for holding or clamping the ends of
the yarn and corresponding cutters to cut the tail ends of yarn. The said yarn
ends after cutting are configured to position inside the preparatory tube for
the preparation of the yarn ends. The prepared yarn ends are placed in the
splicing chamber. A pair of top & bottom yarn introduction levers controls the
placemént of the yarn end inside the preparatory tube & splicing chamber.
After the completion of splicing operation, the yarn must be released from the
splicing chamber, once the winding drum starts rotating. The releasing of the
yarn from the splicing chamber is ensured by the yarn monitoring device, to prevent the yarn running inside the splicing chamber. The said running of
yarn inside the splicing chamber causes damages to the surfaces of the
chamber. The said damaged splicing chamber affects the quality of the
splicing of the yarns.
All the known splicers employ a common drive mechanism such as cam or
motor for the movement of both the upper and lower yarn introduction levers
of the splicer respectively. The drawback associated with said common drive
for the upper and lower yarn introduction levers are that both levers act
synchronously to place the yarn ends inside the splicing chamber without the
provision of adjusting the top and bottom yarn lengths independently. In
addition, after the completion of the splicing operation, the yarn is released from the splicing chamber simultaneously during the restart of the winding
drum. The said releasing of the yarn from both the upper. and lower lever
simultaneously causes the yarn to swing outside the regular yarn running path, causing the yarn monitor to sense falsely which affects and restarts
another spicing operation from the beginning. The said frequent failure and
restating of the splicing operations, affects the overall production efficiency of
the yarn winding machines. Also, the said failure of splicing operations and
repetitive cycles -results in higher power consumption in yarn winding
machines, which increases the operating costs of the yarn winding machines.
To overcome the above-mentioned disadvantages, the present invention
provides an improved splicing device for yarn winding machines.
OBJECTS OF THE INVENTION
The main object of the present inventio’n is to provide an improved splicing
device for textile automatic yarn winding machines.
Yet another object of the present invention is to provide an improved drive
arrangement for the yarn introduction levers of the splicing device of the
textile, automatic yarn winding machines.
SUMMARY OF THE INVENTION
The yarn winding machine with a plurality of winding stations are each
provided with a splicing device. The said splicing device comprises a housing
provided with an upper clamp, a lower clamp, an upper preparatory tube, a
lower preparatory tube, an upper yarn introduction lever. a lower yarn
introduction lever and a central splicing chamber. Once the yarn break occurs
in the winding station of the yarn winding machine, a cone or cheese package
running over a winding drum is stopped. An individual top suction arm provided in each station of the yarn winding machine is configured to pick a
tail yarn end from the package of the respective winding station having the
yarn break. Simultaneously, another bottom suction arm or gripper arm
provided in said winding station is configured to pick the tail yarn end from a
supplying cop from yarn unwinding position. Both the top suction arm and
bottom suction arm after picking the yarns, places the yarn ends inside the
splicing chamber of the splicer for splicing the yarn ends, in such a way that
the tail yarn end of package passes through the upper clamp and the tail yarn
end of the supplying cop passes through the lower clamp. Then tail yarn and
of the package held in the top suction arm is clamped in the upper clamp,
subsequently the tail yarn end of the supplying cop is clamped in the lower
clamp. The splicing device is further provided with a cutter near the upper
clamp, for cutting the tail yarn end of the supplying cop held in between
bottom suction arm and the lower clamp. Similarly, the splicing device is
provided with another cutter near the lower clamp. for cutting the tail yarn end
of the package yarn held in between top suction arm ‘and the upper clamp.
The said upper clamp and lower clamp along with the cutters are driven by a
common actuator provided inside the housing of the splicing device. The said
actuator is at least one of the pneumatic or electric actuator.
According to the present invention, at least one independent drive
arrangement is provided for the upper yarn introduction lever and at least
another independent drive arrangement is provided for the lower yarn
introduction lever. The said drive arrangement is at least one of electric drive
motor such as stepper motor or servo motor. The upper clamp holds the tail
end of the package yarn and the lower clamp holds the tail end of the
supplying cop. After said clamping of the tail endé of the package yarn, the
upper yarn introduction lever is actuated to introduce the upper yarn and to alter or adjust the required length of tail yarn end of the package required for
the splicing operation, based on the yarn parameters being processed in the
yarn winding machine. Subsequently, after said clamping of the tail yarn end
of the supplying cop, the lower yarn introduction lever is actuated to introduce
the lower yarn and to alter or adjust the required length of tail yarn end of the
supplying cop required for the splicing operation, based on the yarn
parameters being processed in the yarn winding machine. The independent
drive for each yarn introduction levers provides an advantage of placing
different tail lengths of the yarn ends to be present inside the splicing
chamber during splicing operation.
The upper preparatory tube is placed below the upper clamp, inside the
housing of the splicing device. The lower preparatory tube is placed above
the lower clamp, inside the housing of the splicing device. After the upper and
lower yarn introduction levers are actuated, the upper preparatory tube is
provided with high pressure air current for creating suction force for sucking
the tail yarn end of the supplying cop and the lower preparatory tube is
provided with high pressure air current for creating suction force for sucking
the tail yarn end of the package. Then, the cutter provided near the lower
clamp cuts the tail yarn end of the package held between the upper clamp
and top suction arm. Subsequently, the cutter provided near the upper clamp
cuts the tail yarn end of the supplying cop held between the lower clamp and
bottom-suction arm.
After cutting of yarn ends, the tail end of the supplying cop is sucked into the
upper preparatory tube, due to the suction force applied at the said upper
preparatory tube for preparing yarn end suitable for splicing operation.
Similarly. the tail end of the package is sucked into the lower preparatory tube, due to the suction force applied at the said lower preparatory tube for
preparing yarn end suitable for splicing operation.
After the preparation of yarn ends and before the starting of splicing
operation, the independent drive arrangement for lower yarn introduction
lever is actuated to introduce the bobbin yarn into the spliping chamber, in
similar way, the independent drive érrangement for the upper yarn
ihtroduction lever is actuated to introduce the package yarn into the splicing
chamber. The upper and lower yarn introduction levers, each provided with
independent drive are actuated to alter or adjust the required yarn length to
place the yarn ends inside the splicing chamber. The required length of yarn
can be adjusted either automatically or manually in an input device connected
to control unit provided in the yarn winding machine. The splicing chamber is
further provided with a chamber cover for covering the splicing chamber during the splicing operation.
According to an embodiment of the present invention, the upper and lower
yarn introduction levers, are actuated to alter or adjust the required yarn
length to place the yarn ends inside the splicing chamber in such a way that
the tail yarn end of package will be present around 70% and the tail yarn end
of supplying cop will be present around 30% inside the splicing chamber.
According to the present invention, after the completion of splicing operation,
the independent drive arrangement for Iowér yarn introduction lever and the
independent drive arrangement for upper yarn introduction lever are actuated
to release the spliced yarn from the splicing chamber, by the control unit sequence.
According to another embodiment of the present invention, the control unit
reads and elaborates the real time values of length. speed, tension of yarn
and time, activates the drive arrangements, to control the yarn extra-length
inside the splicer to reduce yarn vibration at star1up such as false fault of
clearer sensor. One of possible electronic control sequence is to activate the
drive arrangement of lower yarn introduction lever and immediately later,
related to a combination of values of length, speed. tension of yarn and time,
activate the drive arrangement of the upper yarn introduction lever.
According to the presen't invention, after the completion of the splicing inside
the splicing chamber, the control unit of the winding station is configured to
control the upper yarn introduction lever and lower yarn introduction lever in
such a way that the lower yarn introduction lever is first actuated to release
the spliced yarn from the splicing chamber, while the upper yarn introduction
lever remains in closed state to hold the spliced yarn. The said release of
lower yarn introduction lever prevents the occurrence of spliced yarn running
inside the splicing chamber and damaging the said splicing chamber. After
release of the spliced yarn by the lower yarn introduction lever, the winding
drum of the yarn winding machine is restarted to wind the extra length of the
package yarn to resume the winding operation. Once the restarting of winding drum is initiated and the extra length of yarn is winded over the package, the
upper yarn introduction lever of the splicer is actuated in a time delay to
release the yarn held in the said upper yarn introduction lever. The said
actuation of upper yarn introduction lever in delay followed by the actuation of
lower yarn introduction lever and restarting of the winding drum is achieved
by individual drive each associated with the said upper yarn introduction lever.
and lower yarn introduction lever.
According to another embodiment of the present invention, another possible
electronic control sequence is to activate the drive arrangement of upper yarn
introduction lever and immediately later. related to a combination of values of
length, speed, tension of yarn and time, activate the drive arrangement of the
lower yarn introduction lever.
The controlled holding and release of the yarn by the lower yarn introduction
lever followed by the upper yarn introduction lever, prevents and controls the
yarn swinging or jumping away from the regular yarn running path. The said
prevention of the swinging of the spliced yarn ensures that the spliced yarn is
always monitored by a yarn clearer sensor provided in each winding station
for monitoring the regular running of yarn.
According to an advantageous embodiment of the present invention, the
controlled movement of the yarn introduction levers each provided with its
own independent drive at the end of each splicing cycle prevents the spliced
yarn.from vibrating and/or swinging away from the regular yarn running path,
thus eliminating need for multiple iterations or restarting of splicing cycles due
to false sensing of clearer sensor and at the same time preventing the
splicing chamber from being damaged due to the yarn running inside the
splicing chamber. The said prevention of multiple iterations or restaning of
splicing cycles improves overall production efficiency of the yarn winding
machines and also results in lower power consumption in yarn winding
machines, which reduces the operating costs ahd increases production of the
yarn winding machines.
According to an embodiment of the present invention, the upper and lower
yarn introduction levers are each provided with independent drive
arrangements and serves at least three separate functions:
i) introduce the tail lengths of the yarn ends to be present inside the splicing
chamber before the splicing operation.
ii) During splicing operation, control the length of tail. Statistically the splice
breakage is not distributed in homogeneous mode (50% upper. 50% lower
part near splice), unbalancing the length tails, so each tail has different
lengths, it is possible to compensate this effect. Hence, the splicing device
according to the present invention has the advantage of providing unbalancing tail length of upper and lower yarns inside the splicing chamber.
iii) After the completion of the splicing, release the spliced yarn: upper and
lower groups are mechanically independent and controlled separately by a
control unit. The electronics u'nit controls the levers position, reading and
elaborating the real-time values of length, speed, tension of yarn and time, to
control the yarn extra-length inside the splicer reducing vibration at drum
stanup (false reading of clearer sensor).
Other aspects and advantages of the invention will become apparent from the
following description, taken in conjunction with the accompanying drawings,
illustrating by way of example the principles of the invention.
BRIEF DESCRIPTION OF THE ACCOMPANYING DRAWINGS
Figure 1 illustrates the schematic view of the yarn winding machine according
to the present invention.
Figure 2 illustrates the schematic view of splicing device of the yarn winding
machine according to the present invention.
Figure 3 illustrates the exploded view of splicing device of the yarn winding
machine shown in figure 2 according to the present invention.
Figure 4 illustrates the exploded view of drive arrangement for upper clamp
and lower clamp of the splicing device of the yarn winding machine shown in
figure 2 according to the present invention.
Figure 5 illustrates the exploded View of drive arrangement for upper yarn
introduction lever and lower yarn introduction lever of the splicing device
shown in figure 2 according to the present invention.
Figure 6 illustrates the exploded view of splicing chamber of the splicing
device shown in figure 2 according to the present invention.
DETAILED DESCRIPTION OF THE INVENTION
Referring to figures, the yarn winding machine (1) with a plurality of winding
stations (1a) are each provided with a splicing device (2) The said splicing
device (2) comprises a housing (2a) provided with an upper clamp (3a), a
lower clamp (3b), an upper preparatory tube (4a), a lower preparatory tube
(4b), an upper yarn introduction lever (53), a lower yarn introduction lever (5b)
and a splicing chamber (6). Once the yarn break occurs in the winding station
(1a) of the yarn winding machine (1), a cone or cheese package (8) running
over a winding drum is stopped. An Iindividual top suction arm (9) provided in
each station (1a) of the yarn winding machine (1) is configured to pick a tail
yarn end from a package (8) of the respective winding station (13) having the
yarn break. Simultaneously, another bottom suction arm (10) or gripper arm
provided in said winding station (13) is configured to pick the tail yarn end
from a supplying cop (11) in unwinding position. Both the top suction arm (9)
and bottom suction arm (10) after picking the yarn, places the yarn ends
inside the splicing chamber (6) of the splicer forjoining the yarn ends, in such
a way that the tail yarn end of package (8) passes through the upper clamp
(3a) and the tail yarn end of the supplying cop (11) passes through the lower
clamp (3b) Then tail yarn end of the package (8) held in the top suction arm (9) is clamped in the upper clamp (3a), subsequently the tail yarn end of the
supplying cop (11) is clamped in the lower clamp (3b). The splicing device is
provided with a cutter near the upper clamp (3a) for cutting the tail yarn end
of the supplying cop (11) held in between bottom suction arm (10) and lower
clamp (3b). Similarly the splicing device is provided with another cutter near
the lower clamp (3b) for cutting the tail yarn end of the package (8) held in
between top suction arm (9) and upper clamp (3a). The said upper clamp (3a)
and lower clamp (3b) along with the cutter are driven by a common actuator
(31) provided inside the housing (2a) of the splicing device (2). The said
actuator is at least one of the pneumatic or electric actuator.
According to the present invention, at least one independent drive
arrangement (51) is provided for the upper yarn introduction lever (5a) and at
least another independent drive arrangement (52) is provided for the lower
yarn introduction lever (5b). The said drive arrangement (51, 52) is at least
one of electric; drive motor such as stepper motor or servo motor. The upper clamp (3a) holds the tail end of the package (8) yarn and the lower clamp (3b)
holds the tail end of the supplying cop (11). After said clamping of the tail end
of the package (8) yarn, the upper yarn introduction lever (5a) is actuated to
alter or adjust the required length of tail yarn end of the package (8) required
for the splicing operation, based on the yarn parameters being processed in
the yarn winding machine (1). Subsequently, after. said clamping of the tail
yarn end of the supplying cop (11), the lower yarn introduction lever (5b) is
actuated to alter or adjust the required length of tail yarn end of the supplying
cop (11) required for the splicing operation, based on the yarn parameters
being processed in the yarn winding machine (1). The independent drive for
each yarn introduction levers provides an advantage of placing different
lengths of the yarn ends to be present inside the splicing chamber (6) for
splicing operation.
The upper preparatory tube (4a) is placed below the upper clamp (33), inside
the housing (2a) of the splicing device (2). The lower preparatory tube (4b) is
placed above the lower clamp (3b), inside the housing (Za) of the splicing
device (2). After the upper and lower yarn introduction levers (5a, 5b) are
actuated, the upper preparatory tube (4a) is provided with high pressure air
current for creating suction force for sucking the tail yarn end of the supplying
cop (11) and the lower preparatory tube (4b) is provided with high pressure
air current for creating suction force for sucking the. tail yarn end of the
package (8).
Then, the cutter linked with the lower clamp (3b) cuts the tail yarn end of the
package (8) held between the upper clamp (3a) and the top suction arm (9).
Subsequently, the cutter linked with the upper clamp (3a) cuts the tail yarn end of the supplying cop (11) held between the lower clamp (3b) and the
bottom suction arm (10).
After cutting of yarn ends, the tail end of the supplying cop (11) is sucked into
the upper preparatory tube (43), due to the suction force applied at the said
upper preparatory tube (4a) for preparing yarn end suitable for splicing
operation. Similarly, the tail end of the package (8) is sucked into the lower
preparatory tube (4b), due to the suction force applied at the said lower
preparatory tube (4b) for preparing yarn end suitable for splicing operation
After the preparation of yarn ends and before the staining of splicing
operation, the independent drive arrangement (52) for lower yarn introduction
lever (5b) is actuated to introduce the bobbin yarn into the splicing chamber
(6), in similar way, the independent drive arrangement (51) for the upper yarn
introduction lever (5a) is actuated to introduce the package yarn into the
splicing chamber (6). The upper and lower yarn introduction levers (5a, 5b),
each provided with independent drive are actuated to alter or adjust the
required yarn lengths to place the yarn ends inside the splicing chamber (6).
The required length of yarn can be adjusted either automatically or manually
in an input device connected to control unit provided in the yarn winding
machine (1). The splicing chamber (6) is further provided with a chamber
cover (6a) for covering the splicing chamber (6) during the splicing operation.
According to an embodimént of the present invention, the upper and lower
yarn introduction levers (5a & 5b) are actuated to alter or adjust the required
yarn lengths to place the yarn ends inside the splicing chamber (6) in such a
way that the tail yarn end of package (8) will be present around 70% and the tail yarn end of supplying cop (11) will be present around 30% inside the
splicing chamber (6).
According to the present invention. after the completion of splicing operation,
the independent drive arrangement (52) for lower yarn introduction lever (5b)
and the independent drive arrangement (51) for upper yarn introduction lever
(53) are actuated to release the spliced yarn from the splicing chamber (6), by
the control unit sequence.
According to another embodiment of the present invention, the control unit
reads and elaborates the real time values of length, speed, tension of yarn
and time. activates the drive arrangements (51) and (52), to control the yarn
extra-length inside the splicer to reduce yarn vibration at stanup such as false
fault of clearer sensor. One of possible electronic control sequence is to
activate the drive arrangement (52) of the lower yarn introduction lever (5b),
and immediately later, related to a combination of values of length, speed,
tension of yarn and time, activate the drive arrangement (51) of upper yarn
introduction lever (5a).
According to the present invention, after the completion of the splicing inside
the splicing chamber (6). the control unit of the winding station (1a) is
configured to control the upper yarn introduction lever (5a) and lower yarn
introduction lever (5b) in such a way that the lower yarn introduction lever
(5b) is first actuated to release the spliced yarn from the splicing chamber (6),
while the upper yarn introduction lever (5a) remains in closed state to hold the
spliced yarn. The said release of lower yarn introduction lever (5b) prevents
the occurrence of spliced yarn running inside the splicing chamber (6) and
damaging the said splicing chamber (6). After release of the spliced yarn by the lower yarn introduction lever (5b), the winding drum of the yarn winding
machine (1) is restarted to wind the extra length of the package (8) yarn to
resume the winding operation. Once the restarting of winding drum is initiated
and the extra length of yarn is winded over the package (8), the upper yarn
introduction lever (5a) of the splicer is actuated in a time delay to release the
yarn held in the said upper yarn introduction lever (5a). The said actuation of
upper yarn introduction lever (5a) in delay followed by the actuation of lower
yarn introduction lever (5b) and restarting of the winding drum is achieved by
individual drive each associated with the said upper yarn introduction lever
(5a) and lower yarn introduction lever (5b).
According to another embodiment of the present invention, another possible
electronic control sequence is to activate the drive arrangement (51) of upper
yarn introduction lever (5a) and immediately later, related to a combination of
values of length, speed, tension of yarn and time. activate the drive
arrangement (52) of the lower yarn introduction lever (5b).
, The controlled holding and release of the spliced yarn by the lower yarn
introduction lever (5b) followed by the upper yarn introduction lever (53).
prevents and controls the yarn swinging or jumping away from the regular
yarn running path. The said prevention of the swinging of the spliced yarn
ensures that the spliced yarn is always monitored by a yarn clearer sensor
provided in each winding station (1a) for monitoring the regular running of
yarn.
According to an advantageous embodiment of the present invention, the
controlled movement of the yarn introduction levers each provided with its
own independent drive (51, 52), at the end of each splicing cycle prevents the spliced yarn from vibrating and/or swinging away from the regular yarn
running path, thus eliminating need for multiple iterations or restarting of
splicing cycles due to false sensing of clearer sénsor and at the same time
preventing the splicing chamber (6) from being damaged due to the
occurrence of yarn running inside the splicing chamber (6). The said
prevention of multiple iterations or restarting of splicing cycles improves
overall production efficiency of the yarn winding machines (1) and also results
in lower power consumption in yarn winding machines (1), which reduces the
operating costs and increases production of the yarn winding machines (1).
In View of the present disclosure which describes the present invention, all
changes, modifications and variations within the meaning and range of
equivalency are considered within the scope and spirit of the invention. It is to
be understood that the aspects and embodiment of the disclosure described
above may be used in any combination with each other. Several of the
aspects and embodiment may be combined together to form a further
embodiment of the disclosure.
We claim:
1.A splicing device (2) for a yarn winding machine (1) comprising:
a housing (2a);
an upper clamp (3a) with a cutter and a lower clamp (3b) with a cutter,
wherein the said upper clamp (3a) and lower clamp (3b) are driven by a
common actuator (31);
an upper preparatory tube (4a) and a lower preparatory tube (4b);
an upper yarn introduction lever (5a) configured to introduce the upper yarn,
to alter or adjust required length of tail yarn end of a package (8) inside a
spliéing chamber (6) and to release the upper part of spliced yarn, and a
lower yarn introduction lever (5b) configured to introduce the lower yarn, to
alter or adjust the required length of tail yarn end of a supplying cop (11 inside the splicing chamber (6) and to release the lower part of spliced yarn,
wherein the upper yarn introduction lever (5a) is driven by at least one
independent drive arrangement (51) and the lower yarn introduction lever (5b)
is driven by at least another independent drive arrangement (52);
wherein after the completion of splicing operation, the independent drive
arrangement (52) for lower yarn introduction lever (5b) and the independent
drive arrangement (51) for upper yarn introduction lever (53) are actuated to
release the spliced yarn from the splicing chamber (6), by a control unit
sequence.
2. The splicing device as claimed in claim 1, wherein one of possible
electronic control sequence is to activate the drive arrangement (52) of lower
yarn introduction lever (5b) and immediately later, related to a combination of
values of length, speed, tension of yarn and time, activate the drive
arrangement (51) of upper yarn introduction lever (5a).
3. The splicing device as claimed in claim 1. wherein one of possible
electronic control sequence is to activate the drive arrangement (51) of upper
yarn introduction lever (5a) and immediately later, related to a combination of
values of length, speed. tension of yarn and time. activate the drive
arrangement (52) of lower yarn introduction lever (5b).
4. The splicing device as claimed in claim 1, wherein the actuator (31) for
driving the upper clamp (3a) and lower clamp (3b) is at least one of a
pneumatic or an electric actuator.
5, The splicing device as claimed in claim 1, wherein the drive arrangement
(51) for the upper yarn introduction lever (5a) and the drive arrangement (52)
for the lower yarn introduction lever (5b). is at least one of an electric drive
motor such as a stepper motor or a servo motor.
6. The splicing device as claimed in claim 1, wherein the independent drive
_ arrangements (51. 52) for the upper yarn introduction lever (5a) and lower
yarn introduction lever (5b) are configured to alter or adjust the required
length of tail yarn end based on the yarn parameters being processed in the
yarn winding machine (1).
7. The splicing device as claimed in claim 6, wherein the independent drive
arrangements (51, 52) for the upper yarn introduction lever (5a) and the lower
yarn introduction lever (5b) are configured to place different lengths of the
yarn ends inside the splicing chamber (6) required for splicing operation
8. The splicing device as claimed in claim 7, wherein the required length of
yarn can be adjusted either automatically or manually in an input device
connected to a control unit provided in the yarn winding machine (1).
9. The splicing device as claimed in claim 8, wherein the length of the tail
yarn end of package (8) will be present around 70% and the length of the tail
yarn end of supplying cop (11) will be present around 30% inside the splicing
chamber (6).
10. The splicing device as claimed in claim 1, wherein after release of the
spliced yarn by the lower yarn introduction lever (5b), the winding drum of the
.
yarn winding machine (1) is restarted to wind the extra length of the package
(8) yarn to resume the winding operation.