FORM 2
THE PATENTS ACT, 1970
[39 of 1970]
&
THE PATENTS (AMENDMENT) RULES, 2006
COMPLETE SPECIFICATION
[See Section 10 and Rule 13]
1. TITLE : CRADLE ASSEMBLY FOR DRAFTING IN TEXTILE MACHINERY
2. APPLICANT(S) :
a. Name : A.T.E. ENTERPRISES PRIVATE LIMITED
b. Nationality : INDIAN
c. Address : 43, Dr. V.B. Gandhi Marg, Fort, Mumbai 400023, Maharashtra,
INDIA
2. PREAMBLE TO THE DESCRIPTION:
The following specification particularly describes the invention and the manner in which it is to be performed.

"CRADLE ASSEMBLY FOR DRAFTING IN TEXTILE MACHINERY"
The following specification particularly describes the invention and the manner in which
it is to be performed.
FIELD OF THE INVENTION
[1] The present disclosure generally relates to a new and an improved cradle assembly for drafting in textile machinery. In particular, the present disclosure relates to a cradle assembly loaded with spring and apron for drafting in textile machinery.
BACKGROUND OF THE INVENTION
[2] Textile machinery used to create yarn from fibers have drafting system in which the fibers are parallelized and drafted to orient the fibers before they are twisted. The drafting system comprises a front roller pair, a middle roller pair, and a rear roller pair.
[3] Each roller pair consists of a top roller and a bottom roller. The top rollers are mounted in weighting elements fixed to a top arm. In the drafting system, the bottom rollers are positively driven and the top rollers are followers. Further, on the top and bottom rollers of the middle roller pair, aprons are mounted. The top apron is guided by the cradle and the bottom apron is guided by the deflection rail. Aprons are endless belts made from rubber-like material. In case of the middle roller pair, the bottom roller drives the bottom apron and the top apron drives the top roller. The bottom roller drives the top roller due to friction.
[4] The fibers are fed into the system from the rear roller and exit from the front roller. For drafting the fibers, each of the bottom rollers are driven at different rotational speeds such that the front bottom roller is driven at a higher speed as compared to the rear bottom roller. Due to the speed difference, the fibers exiting from

the system are distributed. As the fibers are distributed they have a tendency to separate and fallout and therefore aprons are provided on the top roller and the bottom rollers to transfer the fibers from the middle roller pair to the front roller pair.
[5] The aprons on the top rollers are guided by cradles and the aprons on the bottom rollers are guided by deflection rails. An apron on the top rollers may attain different shapes due to varying length of the apron over the cradle. Shape of the apron is also affected by varying frictional forces. As a result, few aprons may be smooth in rotation and few may become tight. For achieving good quality of yarn, the aprons should move smoothly and uniformly,
OBJECT OF THE INVENTION
[6] The object of the invention is to provide smooth and uniform movement of aprons by utilizing a new and an improved cradle assembly for a drafting system. More specifically, the object of the invention is to regulate apron tension. Another object of the invention is to allow easy removal of the apron by utilizing the novel cradle assembly.
SUMMARY OF THE INVENTION
[7] The object of the invention is to furnish a novel cradle assembly which facilitates in regularizing the tension in the apron. The cradle assembly includes a center part on which a tensioning device is mounted with the use of coupling device. Coupling device attaches tensioning device with center part. Also, the center part allows rotation of tensioning device. A tension creating device, more preferably a spring is placed between the tensioning device and center part. Tension creating device helps tensioning device create either an optimum tension in apron, which ultimately results in a smooth or uniform movement or minimum or zero tension which results in easy removal of the apron from the drafting rollers,

DETAILED DESCRIPTION
[8] A new improved cradle assembly for drafting in textile machinery is described.
[9] In the following description, numerous specific details are set forth in order to provide a thorough understanding of embodiments of the present disclosure. It will be apparent, however, to one skilled in the art that embodiments of the present disclosure may be practiced without some of these specific details.
[10] Embodiments of the present disclosure include various steps, which will be described below. The steps may be performed by hardware components or may be embodied in machine-executable instructions, which may be used to cause a general purpose or special-purpose processor programmed with the 'instructions to perform the steps.
[11] Alternatively, the steps may be performed by a combination of hardware, software, firmware and/or by human operators.
[12] Terminologies
[13] Brief definitions of terms used throughout this application are given below.
[14] The term "drafting system" refers to a part of textile machinery used to create yarn from fibers. Drafting systems are generally used for distributing and parallelizing fibers before the fibers are twisted.
[15] The term "rotter pair" generally refers to a top roUer and a bottom roUer. The bottom rollers are positively driven and the top rollers are driven by the friction between the top roller and the bottom roller.
[16] The term "apron" generally refers to an endless belt made from rubber or any other suitable material. The apron helps in guiding the fibers from one roller pair to the

other roller pair. Further, they also help in parallelizing the fibers that enter from one end of the drafting system and exit from the other.
[17] The term "tensioning device" generally refers to a device using which tension can be adjusted in the apron.
[18] The term "tension creating device" generally refers to a device that is attached to the tensioning device and helps in moving the tensioning device so that tension can be adjusted in the apron.
[19] The term "coupling device" generally refers to a device that is used to attach two parts together.
[20] The terms "connected", "coupled", or "attached" and related terms are used in an operational sense and are not necessarily limited to a direct connection or coupling. Thus, for example, two devices may be coupled directly, or via one or more intermediary media or devices. As another example, devices may be coupled in such a way that information can be passed there between, while not sharing any physical connection with one another. Based on the disclosure provided herein, one of ordinary skill in the art will appreciate a variety of ways in which connection or coupling exists in accordance with the aforementioned definition.
[21] The phrases "in an embodiment," "according to one embodiment," and the like generally mean the particular feature, structure, or characteristic following the phrase is included in at least one embodiment of the present disclosure, and may be included in more than one embodiment of the present disclosure. Importantly, such phrases do not necessarily refer to the same embodiment.

[22] If the specification states a component or feature "may", "can", "could", or "might" be included or have a characteristic, that particular component or feature is not required to be included or have the characteristic.
[23] The terms "first," "second,", "third", "top", "bottom" and the like, herein do not denote any order, quantity, or importance, but rather are used to distinguish one element from another, and the terms "a" and "an" herein do not denote a limitation of quantity, but rather denote the presence of at least one of the referenced item. The term plurality, as used herein, is defined as two or more than two. The term another, as used herein, is defined as at least a second or more. The terms including and/or having, as used herein, are defined as comprising (i.e., open language).
[24] Various embodiments of the present disclosure provide a cradle assembly having a center piece and a tensioning device. The tensioning device is attached to the center piece using a coupling device. The coupling device is such that it allows the movement of the tensioning device. Further, the movement of the tensioning device is determined by a tension creating device included in the tensioning device. The tension creating device may be a spring. The movement of the tensioning device helps regulate tension in aprons. When the tensioning device is at a first position then the tension in the apron is the minimum and in general scenarios, there is no tension in the apron at this position. Therefore, at the first position, the apron can be easily removed. When the tensioning device is at a second position then the tension in the apron is higher. At the second position, with the higher tension the desirable apron movement is possible. Therefore, it is required that the position of the tensioning device should be such that smooth and uniform movement of the apron is enabled.
[25] FIG. 1 is a diagram conceptually illustrating an exemplary drafting system 100 of the present disclosure. Drafting system 100 comprises three roller pairs i.e. a first roller pair, a second roller pair, and a third roller pair. The roller pairs are arranged, in

sequence one after the other. Each roller pair consists of a top roller and a bottom. roller. In the present example, the first roller pair consists of top roller 105a and bottom roller 105b. Similarly, the second roller pair and the third roller pair consist of top roller 110a and bottom roller 110b and top rollers 115a and bottom roller 115b, respectively. In an embodiment, drafting system 100 may include more than three roller pairs, based on requirement of the textile machinery.
[26] In an embodiment, the top rollers of each of the roller pairs are an assembly of two cots mounted on a top roller axle. The two cots may be prepared using rubber, steel or any other suitable material or combinations thereof. The top rollers are mounted on weighting elements (not shown) and fixed to a top arm (not shown). Further, the bottom rollers of each of the roller pairs are continuous steel shafts or made of other similar material, in addition, for each of the pairs of rollers, the bottom rollers are positively driven and the top rollers are followers, rolling due to the rotation of the bottom rollers.
[27] Fibers are fed from the first roller pair, pass through the second roller pair, arid finally exit from the third roller pair. At the second roller pair and the third roller pair the fibers are distributed and parallelized. To provide a smooth transfer of the fibers from the second roller pair to the third roller pair, a top apron 120a and a bottom apron 120b are provided on the top roller 110a and bottom roller 110b, respectively. It should be noted that the bottom rollers are positively driven. Therefore, bottom roller 110b drives bottom apron 120b which drives top apron 120a, eventually driving top roller 110a. Top apron 120a is guided by a top guiding mechanism and bottom apron 120b is guided by a bottom guiding mechanism. In an embodiment, the top guiding mechanism is a cradle assembly 125 (as shown in FIG. 1). Further, the bottom guiding mechanisrrnis a deflection rail. Any other bottom guiding mechanism may be used based on requirement of drafting system 100. The top guiding mechanism (i.e. cradle assembly

125) and the bottom guiding mechanism may be made of plastic, metal, or any other suitable material or combinations thereof .
[28] As shown in FIG. 1, top roller 110a is coupled to cradle assembly 125. Apron 120a passes over the top roller 110a and cradle assembly 125. Similarly, apron 120b passes over bottom roller 110b and the bottom guiding mechanism. The following description will describe the cradle assembly 125 of top roller 110a.
[29] In accordance with the present embodiment, cradle assembly 125 includes a center piece150, a tensioning device 135, and a coupling device 140. Tensioning device 135 is assembled with the center piece 150 using coupling device 140. Center piece 150 defines the angle through which tensioning device 135 can rotate. Center piece 150 is designed so that it allows rotation of tensioning device 135. The rotation of tensioning device 135 helps in maintaining tension in apron 120a. Tensioning device 135 includes a tension creating device 145. According to an embodiment, tension creating device 145 is a spring.
[30] In an embodiment, a helical compression spring may be used. A force is applied to make the helical compression spring shorter and the spring is inserted in tensioning device 135. The role of the compression helical spring is to return to its original length. Therefore, the spring applies pressure to move tensioning device 135 and thus create tension in apron 120a.
[31] In another embodiment, a torsional spring may be used. When a twisting force is applied to the torsional spring, it exerts a torque in the opposite direction. The torque is proportional to the angle by which the spring is twisted. As a result of the torque, the torsional spring pushes tensioning device 135 and therefore is able to create tension in apron 120a.

[32] In yet another embodiment, tension creating device 145 may be a rod havingia'n
adjustable length. The length of the rod may be suitably adjusted, using hardware or
software means, to create tension in apron 120a. In addition, tension creating device
145 may be any device that helps tensioning device 135 create an optimum tension in
apron 120a.
[33] It may be observed when tensioning device 135 is at a first position, then the
tension in apron 120a is the minimum, and in general scenarios, there is no tension in
the apron at this position. This helps in easy removal of apron 120a. However, when
tensioning device 135 is at a second position, then the tension in apron 120a is higher.
The tension in apron 120a defines the tightness of the apron. The tension in apron 120a
should be such that bottom apron 120b is able to drive top apron 120a. The tension
creating device 145 is used to apply pressure to move tensioning device 135 towards the
second position. In the present embodiment, coupling device 140 helps move tensioning
device 135 between the first position and second position.
[34] Coupling device 140 is used to attach tensioning device 135 to center piecel50. Coupling device 140 allows easy movement of the attached portions. In addition, coupling device 140 allows easy removal of the coupled parts in case of wear and tear without entailing any extra costs. Coupling device 140 may be a pivot pin, a thin metal strip, a sliding device, or any suitable means.
[35] In an embodiment, coupling device 140 may be a pivot pin. The pivot pin entails smooth rotation of the coupled parts. In another embodiment, coupling device 140 may be a thin metal strip. Advantageously, the usage of the thin metal strip does not entail any design changes to the coupled parts. In yet another embodiment, center piece 150 may be coupled to tensioning mechanism 135 using a sliding mechanism. The two coupled parts may be suitably designed so that one can be slid into the other.

[36] In another embodiment of the cradle assembly 125, tensioning device 135 is not movable and is fixed to center piece 150. In this embodiment, tensioning device 135 may have a movable top portion. The top portion may move up and down. The vertical movement of the top portion of tensioning device 135 determines the tension in apron 120a. When the top portion of tensioning device 135 is in the lower most position i.e. the first position, then the tension in apron 120a is the minimum. However, when the top portion of tensioning device 135 is in a higher most position, i.e. second position, then the tension in apron 120a is higher. In this way, the present disclosure helps regulate tension in apron 120a during operation, and also allows easy removal of apron 120a when needed.
[37] In an embodiment, the cradles used in drafting are generally with fixed
construction. The aprons used along with the cradles have variations due to
manufacturing process. Due to the variations in length of aprons, there is change in the
tensions in apron, which results in different friction forces. As a result some aprons are
smooth in rotation and some are tight. Smooth and uniform movement of aprons is
essential for minimizing the deterioration of yarn quality.
[38] In an embodiment, new spring loaded cradle regulates the tension in apron, irrespective of the apron length variation, with the help of spring force, resulting in uniform, smooth movement of aprons.
[39] In an embodiment, spring applies pressure to move the apron guides to generate tension in the apron.
[40] In an embodiment, tensioning device when pressed to the lowermost position allows easy removal of the apron.
[41] In an embodiment, aprons are required to be removed during cleaning and maintenance. With the fixed cradle, it is necessary to remove the cradle along with top

roller and aprons from the weighting arm, and then the top roller is removed from the cradle to enable apron removal.
[42] In an embodiment, with the new spring loaded cradle it is possible to quickly remove and assemble aprons on the cradle.
[43] Figure 2 illustrates cradle assembly 200. The assembly comprises center part 220 coupling device or pivoting pins 225, tensioning device 215, tension creating device or spring 230, apron guide element 240, apron 210 and top roller 205. Tensioning device 215 is assembled with center part 220 with the help of coupling device or pivot pins 225 The tensioning device 215 can rotate about the axis of coupling device or pivot pins 225 The center part 220 defines the angle through which the tensioning device 215 can rotate thereby, creating a tension in the apron 210. The apron guide element 240 prevents the lateral movement of the apron 210. The tension is determined according to the position attained by the tensioning device 215. Figure 2 depicts the second position of tensioning device wherein the tension in the apron is optimum such that, the apron moves with a uniform movement. The tension creating device 230 is placed between the center part 220 and the tensioning device 215. The tension creating device exerts an upward force on the tensioning device 215 so that a tension is created in the apron 210.
[44] In an embodiment, apron guide element 240 when pressed to the lowermost position, allows the easy removal of apron 210.
[45] Figure 3 depicts mechanism of the roller movement 300. Assembly contains front
top roller 315a, front bottom roller 315b, middle top roller 310a, middle bottom roller
310b, top apron 320a, bottom apron 320b, cradle 325, nose bar or deflection rail 330
rear top roller 305a, rear bottom roller 305b and fiber 335. The bottom rollers (315b,
310b, 305b) are positively driven and the top rollers (315a, 310a, 305a) are
followers, rolling on the bottom rollers (315b, 310b, 305b). For the middle roller pair

(310a, 310b); bottom roller 310b is positively driven. The bottom roller 310b drives the bottom apron 320b, the bottom apron 320b drives the top apron 320a and the top apron 320a drives the top roller 310a. The drive from bottom roller to top roller is by friction. Fibers 335 are fed into the system from rear roller side, and exits from front
roller side. For drafting the fibers 335, each of the bottom rollers are driven at different
rotational speeds, the rear roller at the lowest speed and the front roller at the highest speed. The speed difference is large between the front and middle rollers and is in the range 4-50 times. Due to the speed difference, the fiber fed in is distributed and therefore the exiting strand is 4-50 times longer than the incoming strand. As the fiber is distributed, the tendency for it to separate or fall out increases, and thus aprons are provided to support the fibers while transferring from middle roller pair to the front roller pair. The cradle 325 guides the top apron 320a and held the apron in required position.
[46] Figure 4 layout of the cradle assembly 400. The assembly includes top apron 405, top roller 410, cradle 415, apron guide 420, cradle spring 425, distance clips 430. Thei distance between the top and bottom aprons at the delivery side (near front rollers) is of great significance in processing. This distance is controlled by the position of the cradle 415. The cradle 415 is mounted over the middle top roller 410 and a cradle spring 425 is fixed in the cradle 415 which applies force on the cradle 415, turning the deflecting edge of complete cradle downwards. The downward motion of the cradle is limited by the distance clip 430 mounted on the cradle 415 because the distance clip 430 rests on the deflection rail 330 at the bottom middle roller 310b. [47] Figure 5 illustrates exemplary perspective view of single drafting assembly 500 i with drafting elements. Assembly consists of top arm 505, weighting element 510, rear top roller 515, middle top roller 520, cradle 525, top apron 530, and front top roller 540. The weighting element 510 in the top arm 505 presses the top rollers (515, 520, 540) against bottom rollers. The weighting element 510 is a spring-loaded device with a

provision to set different loads required for different processing requirements. The top rollers (515, 520, 540) are mounted in weighting elements 510, fixed on the top arm 505. On the middle top roller 520, a top apron 530 is mounted. Apron 530 is endless belts made from resilient material such as rubber, plastic or any other material thereof

The top apron 530 is guided by the cradle 525.
[48] Figure 6 provides an exemplify view of the cradle assembly 600 and the position

of tensioning device 615 with longer apron length. It includes roller 605, apron 610, tensioning device 615, apron guide element 620, tension creating device 625, coupling device 630, and center part 635. The tensioning device 615 maintains an acute angle with center part 635 so as to provide an optimum tension in the apron 610 in order to facilitate a smooth and uniform movement of the apron.
[49) Figure 7 illustrates the cradle assembly 700 and the position of tensioning device. 715 with shorter apron length. It includes roller 705, apron 710, tensioning device 715, apron guide element 720, tension creating device 725 coupling device 730 and center part 735. The tensioning device maintains an acute angle with center part 735 so as to provide an optimum tension in the apron 710 in order to facilitate a smooth and uniform movement of the apron. The angle made by tensioning device 715 in figure 7 is relatively lesser than the angle made by the tensioning device 615 in figure 6. [50] Figure 8 illustrates the cradle assembly 800 and the position of the tensioning;: device in case where no tension is applied on the apron 810 and the apron can be easily removed. It includes roller 805, apron 810, tensioning device 815, apron guiding element 820, coupling device 825, center part 830. The tensioning device tends to zero degree with center part. Tension creating device exerts no force on the apron 810 and the apron 810 is not in contact with the apron guide element 820. The tensioning device 815 attains a position where angle between tensioning device and center part 830 is . almost zero. This particular position of tensioning device 815 facilitates in easy removal; of apron 810.

[51] The tensioning device is said to maintain a first position and second position through the center part. The second positions (as shown in FIG. 6 and FIG. 7) define an angular position because of which force is exerted on the apron thereby either providing
an optimum tension in the apron or at the first position (as shown in FIG. 8), the
tensioning device makes an almost zero degree with center part thereupon simplifying
the process of removal of apron from the roller. Zero degree is understood as the
minimum angle formed by the tensioning device in pursuance of easy removal of apron
as tension induced at this position is minimum in the apron. Whereas, at the second
position a different angular position is defined by the tensioning device such that it
exerts force on apron and induces optimum tension in the apron thus, the apron
performs a uniform and smooth movement. The uniform and smooth movement: is
advantageous as it helps in achieving good quality of yarn and is advantageous as it
decreases the chances of fiber fall out. The angle between the first position and second
position varies between 8 to 35 degrees depending on the apron length. In another
embodiment the size of roller can range between 24 mm to 34 mm. the preferable size
of roller in the present invention is 25 mm. In the present invention, the spring used as
tension creating device can vary in length with a range between 12 mm to 40 mm. the
suitably preferable size of spring is 22 mm in length.
BRIEF DESCRIPTIONS OF DRAWINGS
[52] FIG.l illustrates the cradle assembly and roller arrangement 100.
FIG.2 illustrates cradle assembly 200.
FIG. 3 depicts mechanism of the roller movement 300.
Figure 4 layout objectivity of the cradle assembly 400.
Figure 5 illustrates exemplary perspective view of single drafting assembly 500.

Figure 6 provides an exemplify view of the cradle assembly 600 and the position! of tensioning device 615 with longer apron length,
Figure 7 illustrates the cradle assembly 700 and the position of tensioning device 715
with shorter apron length. '
Figure 8 illustrates the cradle assembly 800 and the position of the tensioning device in case where no tension is applied on the apron
[53] While the invention has been described with respect to only two physical embodiments thereof, it with be apparent to those skilled in the art that various modifications and improvements thereof may be made without departing from the . scope and spirit of the invention. Accordingly, it is to be understood that the invention is not to be limited by the particular illustrative and preferred embodiments disclosed herein, but only by the scope of the appended claims.
[54] Advantageously, the novel cradle assembly enables smooth and uniform
movement of the apron by providing optimum tension. As a result of the optimum
tension in the aprons, the yarn quality is enhanced as the fibers exiting from the apron
have lesser tendency to separate and fallout. Consequently, the exiting fibers a.r;e
substantially distributed and parallelized than the fibers entering the aprons. In
addition, the new cradle assembly also makes it possible to quickly remove and
assemble aprons on the cradle during cleaning and maintenance without disassembling
cradle from the drafting system. Therefore, by using novel cradle assembly system,
stable and uniform drafting operation can be obtained.

[55] The foregoing descriptions of specific embodiments of the present invention have been presented for purposes of illustration and description. They are not intended to be exhaustive or to limit the present invention to the precise forms disclosed, and obviously many modifications and variations are possible in light of the above teaching.

The embodiments were chosen and described in order to best explain the principles of the present invention and its practical application, and to thereby enable others skilled in the art to best utilize the present invention and various embodiments with various modifications as are suited to the particular use contemplated. It is understood that various omissions and substitutions of equivalents are contemplated as circumstances may suggest or render expedient, but these are intended to cover the application or
implementation without departing from the spirit or scope of the claims of the present invention.
[56] In the foregoing description, specific embodiments of the present invention have been described. However, one of ordinary skill in the art appreciates that various modifications and changes can be made without departing from the scope of the present invention as set forth in the claims below. Accordingly, the description and figures are to be regarded in an illustrative rather than a restrictive sense, and all such modifications are intended to be included within the scope of the present invention. The benefits, advantages, solutions to problems, and any statement(s) that may cause any benefit, advantage, or solution to occur or become more pronounced are not to be construed as a critical, required, or essential features or elements.

We claim:
1. A cradle assembly comprising:
a tensioning device mounted on a center part with a coupling device wherein said
tensioning device rotates in a first position and a second position;
said tensioning device supports an apron with an apron guide element; and
a tension creating device placed between the center part and the tensioning
device.
2. The cradle assembly as claimed in claim 1 wherein said tensioning device maintains the first position and the second position with the center part characterized further in that an angle between the first position and the second position is an acute angle.
3. The acute angle as claimed in claim 2 varies between 8 to 35 degrees depending I on the apron length.
4. The cradle assembly as claimed in claim 1 wherein the tensioning device maintains said first position with the center part characterized further in that the tension in said apron is zero.
5. The cradle assembly as claimed in claim 1 wherein the tensioning device maintains said second position with the center part characterized further in that the tension in said apron is optimum.
6. The cradle assembly as claimed in claim 1 wherein the apron is made up of any resilient material such as rubber or plastic or like material thereof.
7. The cradle assembly as claimed in claim 1 characterized in that the apron guide element is a substantially wedge-shaped member.
8. The cradle assembly as claimed in claim 1 characterized in that the tension creating device is spring.
9. The cradle assembly as claimed in claim 1 characterized in that the tension creating device is a pneumatic rod.

10.The cradle assembly as claimed in claim 1, said tension creating device is the
spring wherein, the spring type can be helical, cantilever leaf or torsional or like
thereof.
11.The cradle assembly as claimed in claim 1, said tension creating device is the
spring wherein, the spring has suitable preferable length in range of 12 mm and
40 mm. 12. A method for a fiber drafting comprising:
rotating atleast one of the roller of each pair of drafting rollers at a rotational
speed which is greater than the rotational speed of the rollers of the preceding
pair of drafting rollers wherein a first roller is rotatably coupled with a second
roller and the second roller is rotatably coupled with a third roller; drafting the
fiber between successive pairs of the drafting roller pairs the fiber being
passed through the circumference in one of the roller of one pair and being
putled by an apron on the other roller pair; whereby the fiber is compacted and
stretched; characterized in that positioning said apron on a roller by means of a
tensioning device;
said tensioning device is affixed on a center part by a coupling device; said
tensioning device supports said apron by means of an apron guide element; a
tension creating device providing movement for the tensioning device between a
first position and a second position with the center part; wherein first roller pair
can take fiber and first roller pair can pass the intake fiber to second roller pair
and the intake fiber can exit from the third roller pair. 13.The method for the fiber drafting as claimed in claiml2 wherein said tensioning
device maintains said first position and second position with the center part
characterized further in that an angle between the first position and the second
position is an acute angle.

14.The acute angle as claimed in claim 13 varies between 8 to 35 degrees depending
on the apron length.
15.The method for the fiber drafting as claimed in claim 12 wherein the tensioning
device maintains said first position with the center part characterized further in
that the tension in said apron is zero.
16.The method for the fiber drafting as claimed in claim 12 wherein said tensioning
device maintains said second position with the center part characterized further
in that the tension in said apron is optimum.
17. The method for the fiber drafting as claimed in claim 15 characterized in that the
apron guide element is a substantially wedge-shaped member.
18.The method for the fiber drafting as claimed in claim 15 characterized in that the
tension creating device is a spring.
19. The method for the fiber drafting as claimed in claim 15characterized in that the tension creating device is a pneumatic rod.
20. The method for the fiber drafting as claimed in claim 15 said tension creating device is the spring wherein, the spring type can be helical, cantilever leaf or torsional or like thereof.
21.The method for the fiber drafting as claimed in claim 15 said tension creating
device is the spring wherein, the spring has suitable preferable length in range of
12 mm to 40mm.
22.The method for the fiber drafting as claimed in claim 15 wherein said drafting is performed such that the fiber is subjected to a total draft by said at least two pairs of drafting rollers of diameter in range of 24 mm to 34mm.
23.The method for the fiber drafting as claimed in claim 15 wherein said drafting is accomplished with three pairs of drafting rollers.