DESC:FORM – 2

THE PATENTS ACT, 1970
(39 of 1970)

COMPLETE SPECIFICATION
(See section 10; rule 13)

“AN IMPROVED YARN TENSION CONTROL APPARATUS”

PRASHANT WEST-POINT MACHINERY PRIVATE LIMITED,
A Company Incorporated under the Indian Companies Act
Having its address at Plot No.4/A-2,
Phase-1, G.I.D.C Estate,
Vatva, Ahmedabad – 382445

The following specification particularly describes the nature of this invention and manner in which it is to be performed:

FIELD OF THE INVENTION
The present invention relates to an improved yarn tension control apparatus. More particularly, the invention relates to an improved yarn tension control apparatus which reduces the time and energy by digitally controlled temperature compensated flux control in running yarn to ensure consistent quality of yarn more efficiently.
BACKGROUND OF THE INVENTION
Yarn tension control is an important parameter for quality and effi-ciency in textile processes. It determines the build and structure of the package, and it has a significant influence on productivity of various processes such as winding, twisting and cabling, and in subsequent processes such as weaving and knitting. However, a great majority of yarns are tensioned by primitive means, resulting in loss of produc-tion and inferior quality. The ideal solution for most processes is the ability to set the yarn tension to a desired level and to be assured that it does not change over time at any yarn position. Further the effect of various factors on yarn tension variation in direct cabling, but very few have addressed the possibility of measuring and controlling it practically while the yarn is being twisted.
Precision or uniformity of tension of the individual yarn ends is essen-tial for overall quality in most textile processing. Existing systems works with manual setting of tension on yarns in the existing ma-chine. The setting depends on the type of yarn which is required for final product. Specifically, the tension depends on denier of the yarn.
A consistent yarn tension is basic requite for consistent warping or sizing of yarn which is one of pre-requisition of good quality high speed waiving and thereby the final quality of cloth. However, it is dif-ficult to maintain the same because; with respect to time, temperature will change in the flux control coil and the tension from the yarn also change resulting in poor quality of yarn winding during warping and thereby cloth from it. Once yarn tension control is lost or allowed to vary at any point of the process, whether winding, beaming, texturiz-ing, knitting or other fabric formations, the quality degeneration is dif-ficult or impossible to compensate for. Streaking, barre, off yield, ex-cessive knitting defects, denier variation, are familiar problems that frequently have their origin in incorrect or uncontrolled tension of the individual yarn ends.

Further, existing control systems are working on analogue electronics; that makes them less accurate more components and drift of compo-nents which makes them less accurate and less reliable, and they are consuming high energy.
PRIOR ARTS OF THE INVENTION:
The US patent application number US4313578 is relates to yarn ten-sion control apparatus for tensioning a running length of yarn such as textile yarns or the like, wherein a plurality of tensioning devices form a controlled channel and are controlled by an electronic control circuit having a manually adjustable tension setting potentiometer for adjusting a circuit to provide output voltages to the tension devices of the channel adding selecting tension values to the yarn. The tension-ing devices each comprise an electromagnet coil and core structure alongside which a pair of wear surface members in the form of plates or discs are supported in parallel vertical planes with the yarn run-ning between and engaging the confronting surfaces of the wear sur-face members and the wear surface member located beyond the yarn plane from the coil and core structure being of magnetic material to be drawn toward the companion wear member by magnetic attractive forces to vary the tensioning of the yarn leaving the yarn tension de-vices. In the disc wear member embodiment, one of the discs is driven by a motor to effect a wiping action on the yarn. Degaussing circuit means are also disclosed for applying intermittent negative going pulses descending to a negative voltage level to the electromagnet coils during downward adjustment of the tension setting potentiometer to minimize residual magnetic effects.
However, the above patent application discloses the manually adjust-able tension setting in potentiometer for adjusting a circuit to provide output voltage to the tension devices. Thus it consume time, energy and man power. The frequent variation in yarn thickness provides low quality of yarn in yarn tension system. The alteration in thickness of yarn leads to variation in voltage of yarn which is manually adjusted by potentiometer. Thus it became time consuming and deteriorate its accuracy and repeatability. Moreover, the quality of yarn beam is dete-riorate over the time by changing in the yarn tension due to fluctua-tion of temperature. Therefore, said prior art fails to provide the im-prove yarn tension control apparatus which reduces the time and en-ergy and increases quality of the yarn more efficiently.
Another European patent application number EP1148323A3 that re-lates to it is an object of the present invention to provides a tempera-ture detecting device and method for a running yarn which can sensi-tively and accurately detect the temperature of the running yarn in a non-contact manner. The present invention provides a temperature detecting device for a running yarn including an infrared sensor for obtaining infrared rays emitted from the running yarn, via an inci-dence section, the temperature detecting device comprising converging means 15 located between an incidence section 12 and an infrared sensor 14, for converging infrared rays obtained through the inci-dence section 12, on the infrared sensor 14, and a reflector 3 spaced from the incidence section 12 and having a reflection surface directed to the incidence section, wherein a space 4 is formed between the in-cidence section 12 and the reflector 3. Infrared rays emitted from a running yarn Y are directly guided to the infrared sensor 14 via the converging means 15 and also indirectly guided to the infrared sensor 14 via the reflector 3 and the converging means 15 (Fig. 1).
However, the above patent application discloses temperature detecting device and method for a running yarn; which fails to provide solution in ongoing fluctuation in temperature in said yarn tension control ap-paratus. Therefore said above prior arts fails to provide the improve yarn tension control apparatus which reduces the time and energy and increases quality of the yarn more efficiently.
DISADVANTAGES OF PRIOR ARTS:
Existing technologies suffers from all or at least any of the below men-tioned disadvantages.
1. The conventional system fails to provide improved yarn tension control apparatus which control the temperature in running yarn. This reduces the time for adjusting the value of tension according to the temperature at every halt. This in turn consumes substantial amount of energy along with time.
2. The conventional system fails to provide improved yarn tension control apparatus which control the flux in running yarn. This re-duces the time for adjusting the flux according to the tension of the running yarn at every halt. Therefore, it consumes substantial amount of energy along with time.
3. Said conventional system provide a manual setting of yarn tension in running yarn apparatus at each an every halt. Thus it increases the chances of fluctuation in set value of tension in running yarn and decreases the quality of the yarn.
4. Conventional apparatuses requires manual intervention to set the value of the tension for the running yarn in the apparatus. This shall require the apparatus to halt every time when there is a change in the value of the tension required. This in turn consumes substantial amount of energy along with time.
5. The conventional apparatus provides potentiometer for manual ad-justment of voltage according to the set value of tension required for running yarn. At every halt one has to set the voltages when there is a change in the value of the tension required, thus it con-sume time energy and manpower.
6. The conventional apparatus provide analog electronics controller which have the drawback of drifting due to fluctuation in time and temperature, when there is a change in the value of the tension re-quired. This reduces its reliability.
7. The conventional apparatus fails to detect the broken ends in the running yarn. Due to broken ends, said apparatus gets stop and all set value or parameters of running yarn get disturbed thus di-rectly affect the quality of the yarns.
8. The conventional system fails to provide digitally controlled tem-perature and flux which leads to fluctuation in set values for tem-perature and voltages. Said set value of temperature and voltage di-rectly affect the tension of running yarns and thus decreases the quality of yarn.
9. The existing apparatus provide non-flexible systems for running yarn that required stopping the machine to in case of change the settings of the apparatus by manually.
Thus there is an unmet need of the invention that obviates the afore-said problems of the prior art.
OBJECTIVES OF THE INVENTION:
The main objective of present invention is to provide an improved yarn tension control apparatus.
Another objective of present invention is to provide digital control temperature compensate in running yarn which reduce drifting in the apparatus due to the fluctuation in the temperature and time, thus increases the reliability in an improved yarn tension control appa-ratus.
Yet another objective of present invention is to provide control tension in running yarn by eliminating fluctuation with respect to time, tem-perature, flux and thereby increasing the quality of the yarn in an im-proved yarn tension control apparatus.
Yet another objective of present invention is to provide control temper-ature compensate in running yarn which reduce drifting in the appa-ratus due to the fluctuation in the temperature and time, thus in-creases the reliability in an improved yarn tension control apparatus.
Yet another objective of present invention is to provide controlled value of temperature and voltage which directly affect the tension of the running yarn which increase quality of yarn in an improved yarn ten-sion control apparatus thus became more efficient.
Yet another objective of present invention is to provide an improved yarn tension control apparatus which adjust the tension of yarn at any point of time during the weaving of the yarn.
Yet another objective of present invention is to provide flexibility of au-to expandability of number of yarn during the weaving of said yarn an improved yarn tension control apparatus.
Yet another objective of present invention is to provide optical sensors for detection of broken ends in the running yarn which passes break-age signal without discontinuing said apparatus.
BRIEF DESCRIPTION OF DRAWINGS:

FIGURE DESCRIPTION
Fig. 1 : Shows the fragmented view of Improved yarn tension control apparatus (P)
Fig. 2 : Shows the Block diagram of the Communication control means (CCM) in an improved yarn tension control apparatus (P)
Fig. 3 Shows working Block diagram of the Controller (C), Tension control unit (PCU), post control unit (PCU) and master control means (MCU)

Meaning of Reference numerals of said component parts of present improved heat exchanger:
P : Improved heat exchanger
1 : Tension Cover
2 : Coil cover
3 : Coupler
4 : Motor
5 : Shaft for Disc
6 : Tension control unit (TCU)
7 : Clamp
8 : Temperature sensor
9 : Optical Sensor
10 : Magnetic material disc
11 : Non-Magnetic material disc
CCM : Serial communication control means
PCU : post control unit
MCU : Master control unit
PWM : Pulse width modulator
CSU : Current sensing unit
C : Controller
VR : Voltage regulator

DETAILED DESCRIPTION OF THE INVENTION:
The present invention provides an improved yarn tension control ap-paratus (P) in an open loop yarn tension system including control of temperature compensated and flux control in running yarn. It reduces the time and energy by adjusting the flux as per the requirement of the tension. Said invention provides tension controller unit (TCU) which controls the flux in a way that it eliminates the fluctuation of flux with respect to time, temperature in the running yarn thereby en-suring consistent quality of yarn providing consistent warping and/or sizing of yarn and hence cloth from it. Said improved yarn tension control apparatus (P) controls the yarn tension of individual yarn in plurality.
In an embodiment the present invention provides a creel system for improved yarn tension control apparatus (P). Wherein, the creel sys-tem facilities the working of each of the plurality of improved yarn tension control apparatus (P). The creel system is interconnected to the present invention (P) which facilitates in substantially increasing the quality and quantity of yarn wrapping in minimum time and with less energy consumption thereby is efficient.
The present invention (P) as shown in Fig 1, uses existing;
• Tension Cover (1),
• Coil cover (2),
• Coupler (3),
• Motor (4),
• Shaft for Disc (5),
• Clamp (7),
• Magnetic material disc (10),
• Non-Magnetic material disc (11),
Wherein further, each of the present plurality of improved yarn ten-sion control apparatus (P), requires and comprises of:
• Tension control unit (TCU) (6),
• Temperature sensor (8),
• Optical Sensor (9),
• Pulse width Modulator (PWM)
• Serial Communication control means (CCM),
• post control unit (PCU),
• Master control unit (MCU),
• Voltage regulator (VR)
• Current sensing unit (CSU),
• Controller (C),
• Creel System.
Wherein,
Said tension cover (1) provides the base to all components of the yarn tension control apparatus; wherein said tension cover (1) is connected to magnetic material disc (10) and non-magnetic material disc (11). Said coil cover (2) provides iron core for electromagnetic coil which aligns the magnetic flux generated by the coil and generates the mag-netic field. This coil cover (2) is connected to the tension control (TCU), Magnetic material disc (10) and Non-Magnetic material disc (11). Said coupler (3) is connected to motor (4) and shaft of the disc (5); wherein the coupler (3) provides the attachment between shaft of the disc (5) and motor (4). Said motor (4) is further connected to coupler (3) and clamp (7); wherein it provides rotation of the 2 discs which is non-magnetic material disc (11) and magnetic material discs (10) at low RPM. Said shaft for disc (5) is connected to the coil cover (2), shaft for disc (5) and motor (4); wherein said shaft for disc (5) provides attach-ment between coil cover (2) and non-magnetic material disc (11). Said plurality of tension control unit (TCU) (6) is connected to creel system, Clamp (7) and post control unit (PCU); wherein tension control unit (TCU) (6) provides regulation and control of yarn tension, temperature and flux in yarn tension control apparatus (P). Said Clamp (7) is con-nected to coil cover (2), shaft of the disc (5), tension control unit (TCU) (6) and optical sensor (9); wherein Clamp (7) provides holding of ten-sion control unit (TCU) (6) and optical sensor (9) tightly together to prevent movement or separation. Said temperature sensor (8) of ten-sion control unit (TCU) is connected to coupler (3) coil cover (2) and controller (C); wherein said temperature sensor (8) sense the tempera-ture and communicates the same to the controller (C). Said Controller (C) further compensates the temperature and regulates the fluctuation in flux by adjusting the flux through pulse width modulator (PWM). Said optical sensor (9) of tension control unit (TCU) (6) is connected to controller (C) and shaft for disc (5); wherein optical sensor (9) provides detection of broken end of running yarn and passes the signal of bro-ken ends to the controller (C). Said Magnetic material disc (10) is con-nected to tensioner cover (1), coil cover (2), motor (4) and non-magnetic material disc (11); wherein said Magnetic material disc (10) provides attraction force to the electromagnetic coil. Said non-magnetic material disc (11) is connected to shaft of disc (5), motor (4) and magnetic material disc (10); wherein said non-Magnetic material disc (11) provides the base for yarn. The running yarn is between this Non-magnetic material disc (11) and Magnetic material disc (10). Said Non-magnetic material disc (11) and Magnetic material disc (10) are rotated at low rpm with help of the Motor (4) which in turn protects the wear and tear of the disc (10) and (11) due to continuously run-ning Yarn in a yarn tension control apparatus (P).
As shown in figure 3 said plurality of tension control unit (TCU) con-sists of
• controller (C),
• voltage regulator (VR),
• serial communication control means (CCM),
• optical sensor (9),
• pulse width modulator (PWM),
• Current sensing unit (CSU),
• Temperature sensor (8).
Wherein the Controller (C) controls and regulates all communication received from components of tension control unit (TCU) and sent to components of tension control unit (TCU) for adjusting the parameters as per the requirements in the system; wherein controller (C) com-municates with serial communication control means (CCM), optical sensor (9), pulse width modulator (PWM), current sensing unit (CSU) and temperature sensor (8). Said voltage regulator (VR) regulates the DC voltage to lower the value of DC voltage require for working of con-troller (C) and other device in the each of the plurality of yarn tension control apparatus (P). Said pulse width modulator (PWM) is connected to controller (C); wherein said pulse width modulator (PWM) controls electromagnetic flux to set the desire value in the improved yarn ten-sion control apparatus (P). The current of the electromagnetic coil is varied by changing the cycle of the pulse train, which eliminates the energy loss. Said current sensing unit (CSU) is connected to controller (C) and pulse width modulator (PWM); wherein said current sensing unit (CSU) senses the current of the electromagnetic coil and provide the feedback to the controller (C) for adjusting the parameters as per the requirements in an improved yarn improved yarn tension control apparatus (P).
In the embodiment the creel system consisting of plurality of improved yarn tension control apparatus (P), as shown in figure 2, comprises of serial communication control means (CCM) consisting of:
• Plurality of Tension control unit (TCU),
• Plurality of post control unit (PCU),
• Master control unit (MCU).
Wherein said serial communication control means (CCM) is connected to controller (C). Said serial communication control means (CCM) pro-vides serial communication between the Plurality of tension control units (TCU), Plurality of post control unit (PCU) and Master control unit (MCU). In said serial communication control means (CCM) the master control unit (MCU) is connected to plurality of post control unit (PCU). Said master control unit (MCU) provides the transmission of the data to Plurality of post control unit (PCU). Said plurality of post control unit (PCU) is connected to master control unit (MCU) and plurality of tension control unit (TCU). Said plurality of post control unit (PCU) is provided for the processing of the transmitted data and pass the data back to master control unit (MCU). Wherein the plurali-ty post control unit (PCU) is also connected to plurality of tension con-trol unit (TCU) to provide the transmission of data. Further said plu-rality of tension control unit (TCU) will process the data and pass the data back to post control unit (PCU).
Thus, the present apparatus (P) efficiently provides control the elec-tronic flux, temperature, and yarn tension in the running yarn, in less time, and consume less energy and man power; wherein it also elimi-nates the chance of error and thus increases the quality of yarn.
WORKING OF THE INVENTION:
Said improved yarn tension control apparatus (P) is an open loop yarn tension system that provides control temperature compensated flux control in running yarn which increases the quality of yarn, reduces time and energy and more efficient. Wherein the creel system of the present improved yarn tension control apparatus (P) controls each of the said plurality of improved yarn tension control apparatus (P); thereby reduce the time and energy. The plurality of tensioner control units (TCU) are installed in the creel system with yarn tension control apparatus (P).
The working steps herein explained with respect to improved yarn tension apparatus (P) with the creel system and its communication control means (CCM).
• Said present apparatus (P) provides running yarn between the magnetic material disc (10) and non-magnetic material disc (11). Said running yarn generates yarn tension in the tension cover (1) in the range of 0 V to 24 Vdc. Said magnetic material disc (10) and non-magnetic material disc (11) are rotated at low rpm with help of the Motor (4) for protecting the wear and tear of the said magnetic material disc (10) and non-magnetic material disc (11) due to con-tinuously running Yarn. The present system enables to adjust the tension at any point of time during the preparation of weaving the yarn; and therefore it is possible for them to obtain Flexible auto expandability of number of yarn.
• As referring to figure 3 in tension control unit (TCU) said controller (C) passes the signal to said voltage regulator (VR) for regulating the voltage of running yarn and thereby control the voltage value in present apparatus. Said set value of voltage is provided to elec-tromagnetic coil and that generates magnetic flux. Said voltage is provided in the range of 0 to 24 vDC in the present system. Said magnetic flux is convert to magnetic field and generate pulling force to magnetic material disc (10) in provided voltage. Further, during the flux generation the temperature of electromagnetic coil and core get increases, which thereby decrease the tension of the yarn from set values. This temperature is sense by the temperature sensor (8) and passed the data to controller (C). Said controller (C) process and control the set data of the temperature according to the average pulses of voltage level and maintain the set value of yarn tension by controlling the flux. Further, said optical sensor (8) detect the broken ends in running yarn by detecting the vibration of light. Once the broken yarn end is detected by said optical sen-sor (9); said optical sensor (9) sense the signal of said broken ends and transmit data to said controller (C). Said controller (C) gener-ates the signal and transmit to the master control unit (MCU) to stop the present apparatus (P).
Further said electromagnetic coil is varied by changing the cycle of the signal transmission. Said pulse width modulator (PWM) pro-cess and controls the electromagnetic flux generation in the pre-sent apparatus (P) through controller (C). Thus pulse width modu-lator (PWM) compensate the electromagnetic flux in desired value of the yarn tension control apparatus (P). Moreover, the current of the electromagnetic coil is sensed by current sensing unit (CSU) and provides feedback to controller (C). Thus said controller (C) controls the current of electromagnetic coil in the present system (P).
• Said serial communication control means (CCM) provides the se-quential transmission of the data from master control unit (MCU) to post control unit (PCU). Wherein the plurality of post control unit (PCU) process the data and transmit the said data back to master control unit (MCU). Said post control unit (PUC) also re-ceives the data from plurality of tension control unit (TCU) with the set value of the said parameters such as electromagnetic flux, tem-perature and yarn tension. Thus said serial communication control means (CCM) provides the transmission of the data in the sequen-tial manner in the creel system.
Thus, the present apparatus (P) efficiently provides control of tem-perature compensate flux and hence tension in the running yarn, in less time, and consume less energy and man power; wherein it also eliminates the chance of error and thus increases the quality of yarn.
ADVANTAGES OF INVENTION:
1. The present invention provides an improved yarn tension control apparatus.
2. The present invention reduces the time and energy and increases quality of the yarn more efficiently.
3. It provides the set desired tension value of running yarn digitally at each tensioner; which reduces the time and energy.
4. In the invention set value of the potentiometer is digitally con-trolled which reduces the time and energy of the system.
5. It provides optical sensors in an improved yarn tension control ap-paratus in which machine stoppage does not get discontinue while running yarn at its broken ends.
6. It provides an improved yarn tension control apparatus which ad-just the tension of yarn at any point of time during the weaving of said yarn.
7. It provides the flexibility of auto expandability of number of yarn during the weaving of said yarn and thus enables the manufactur-er to set the Tension value automatically without stopping the ma-chine.
8. It provides optical sensors in the apparatus which quick transfer the breakage signal to the system thus reduces the time consumed in the prior art.
9. It provides temperature compensated control magnetic flux genera-tion, to eliminate the fluctuation in magnetic flux cause due to change in temperature and hence provides accurate desired tension value in yarn.
10. It provide high yarn quality more efficiently in an improved yarn tension control apparatus.
,CLAIMS:We Claim:
1. An improved yarn tension control apparatus (P) in creel system for open loop yarn tension compensating temperature and controlling yarn tension, flux reducing time and energy uses existing;
• Tension Cover (1),
• Coil cover (2),
• Coupler (3),
• Motor (4),
• Shaft for Disc (5),
• Clamp (7),
• Magnetic material disc (10),
• Non-Magnetic material disc (11);
Characterized in that, the present invention comprises of:
• Temperature sensor (8),
• Optical Sensor (9),
• Pulse width Modulator (PWM)
• Serial Communication control means (CCM),
• Plurality Tension control unit (6) (TCU),
• Plurality post control unit (PCU),
• Master control unit (MCU),
• Voltage regulator (VR),
• Current sensing unit (CSU),
• Controller (C),
• Creel system;
Wherein,
Said tension cover (1) provides the base to all components of the yarn tension control apparatus; Said coil cover (2) provides iron core for electromagnetic coil which aligns the magnetic flux gen-erated by the coil and generates the magnetic field; this coil cov-er (2) is connected to the tension control (TCU), Magnetic mate-rial disc (10) and Non-Magnetic material disc (11); said coupler (3) provides the attachment between shaft of the disc (5) and motor (4); said motor (4) provides rotation of the 2 discs which is non-magnetic material disc (11) and magnetic material discs (10) at low RPM (Revolutions per minute); said shaft for disc (5) provides attachment between coil cover (2) and non-magnetic material disc (11); said tension control unit (TCU) (6) is con-nected to creel system, clamp (7) and post control unit (PCU); wherein said tension control unit (TCU) (6) provides regulation and control of temperature compensated flux in yarn tension, in yarn tension control apparatus (P); said clamp (7) provides hold-ing of tension control unit (TCU) (6) and optical sensor (9) tight-ly together to prevent movement or separation;
said temperature sensor (8) of tension control unit (TCU) sense the temperature and communicates the same to the controller (C); said controller (C) compensates temperature effect and regulates the fluctuation in flux by adjusting the flux through pulse width modulator (PWM) and thereby reduces the time , energy and tension fluctuation cause due to temperature change; said optical sensor (9) of tension control unit (TCU) (6) is connected to controller (C) and shaft for disc (5); wherein op-tical sensor (9) provides detection of broken end of running yarn and thus passes the signal of broken ends to the controller (C); said Magnetic material disc (10) provides attraction force to the electromagnetic coil; said non-magnetic material disc (11) pro-vides the base for yarn; said Non-magnetic material disc (11) and Magnetic material disc (10) are rotated at low rpm to protect wear and tear of the disc (10) and (11) due to continuously run-ning Yarn in a yarn tension control apparatus (P);
said tension control unit (TCU) consist of controller (C) controls and regulates all communication received from components of tension control unit (TCU) and sent to components of tension control unit (TCU) for adjusting the parameters as per the re-quirements in the system; said controller (C) is connected to communication between the voltage regulator (VR), serial com-munication control means (CCM), optical sensor (9), pulse width modulator (PWM), current sensing unit (CSU) and tem-perature sensor (8); said voltage regulator (VR) regulates the DC voltage to lower the value of DC voltage require for working of controller (C) and other device in the each of the plurality of yarn tension control apparatus (P); said pulse width modulator (PWM) is connected to controller (C); wherein said pulse width modulator (PWM) provides control of electromagnetic flux to set the desire value of the improved yarn tension control apparatus (P); the current of the electromagnetic coil is varied by changing the cycle of the pulse train, which eliminates the energy loss; said current sensing unit (CSU) is connected to controller (C) and pulse width modulator (PWM); wherein said current sens-ing unit (CSU) senses the current of the electromagnetic coil and provide the feedback to the controller (C) for adjusting the parameters as per the requirements in an improved yarn im-proved yarn tension control apparatus (P);
said serial communication control means (CCM) is connected to controller (C); Said serial communication control means (CCM) provides sequential communication between the tension control units (TCU), post control unit (PCU) and Master control unit (MCU); In said serial communication control means (CCM) the master control unit (MCU) is connected to plurality of post con-trol unit (PCU); said master control unit (MCU) provides the transmission of the data to post control unit (PCU); wherein said plurality of post control unit (PCU) is connected to master control unit (MCU) and plurality of tension control unit (TCU); said plurality of post control unit (PCU) provides the processing of the transmitted data and pass the data back to master control unit (MCU); said post control unit (PCU) is provided for the transmission of data to plurality of tension control unit (TCU); further said plurality of tension control unit (TCU) process the data and pass the data back to post control unit (PCU).
2. An improved yarn tension control apparatus (P) in creel system for open loop yarn tension as claimed in claim 1; wherein said creel system consists of at least one of yarn tension control apparatus.
3. An improved yarn tension control apparatus (P) in creel system for open loop yarn tension as claimed in claim 1; wherein the serial communication control means (CCM) consist:
at least one tension control unit (6) (TCU),
at least one post control unit (PCU),
Master Control Unit (MCU);
Serially communicating with each other ensuring the error free wrapping of yarn.

Dated this 4th day of October 2019.

________________________
GOPI J. TRIVEDI (Ms)
IN/PA 993
Authorized Agent of the Applicant

To,
The Controller of Patents,
Patent Office,
Mumbai