FIELD OF THE INVENTION
The present invention relates to compact yarn spinning in textile ring spinning machines. Particularly, this invention relates to a mounting arrangement for a compact suction nozzle in drafting arrangement of a textile ring spinning machine.

BACKGROUND OF THE INVENTION
Textile ring spinning machines with compact yarn spinning arrangement comprises drafting arrangement for imparting a predetermined draft on the roving material before transforming into yarn. The said drafting arrangement generally comprises four-over-four drafting rollers. The nozzle with suction slit (openings) is disposed in the drafting arrangement to provide air suction for condensing purpose. The condensing effect is provided to the fibre material which passes in between top rollers and bottom rollers by the effect of suction through the nozzle. The said condensing zone is disposed downstream of the front roller pair in the drafting unit of ring spinning machine. The condensing zone comprises a stationary nozzle having a plurality of suction slit, over which the fibre strands are transported by a plurality of air-permeable transport apron. The condensing zone is bordered on its exit side by a delivery roller or nipping roller (fourth roller). The delivery roller drives the apron. The front drafting roller is disposed behind the nozzle when viewed from machine delivery side. The top rollers along with respective top arms are placed above said bottom drafting rollers.

In known compact spinning arrangement, the positions of the compact suction nozzle and the delivery roller with respect to the front drafting roller are not defined and is subject to variation. This directly affects the quality of resultant yarn and performance of the machine is reduced. The present invention provides an improved mounting arrangement for compact suction nozzle in order to improve the quality of resultant compact spun yam and improves the performance of the ring spinning machine,

OBJECTS OF THE INVENTION
An object of this invention is to provide an improved mounting arrangement for a compact suction nozzle in the drafting arrangement of a textile ring spinning machine.

Another object of this invention is to define the positions of compact suction nozzle and delivery roller with respect to the front drafting roller.

Yet another object of this invention is to improve the quality of compact spun yam and performance of the ring spinning machine.

SUMMARY OF THE INVENTION
According to the present invention a mounting arrangement for a compact suction nozzle in drafting arrangement of a textile ring spinning machine is provided comprising a roller stand, a bracket fixed to the roller stand, a nozzle holder rail fixed to the bracket for mounting a nozzle holder and a nozzle mounted to the nozzle holder.

According to a preferred embodiment of the present invention, the bracket has two recesses for mounting a delivery roller and a middle drafting roller respectively.

According to another preferred embodiment of the present invention, the gap between the nozzle and the delivery roller is defined by the bracket.

According to another preferred embodiment of the present invention, the recesses are U-shaped.

According to another preferred embodiment of the present invention, the bracket has two ear shaped arrangements with openings at the centre for fastening the nozzle holder rail.

According to another preferred embodiment of the present invention, the bracket has an opening between recesses to enable seating of the bracket over the roller stand.

According to another preferred embodiment of the present invention, the nozzle holder has suspension rod holders and suction tube openings.

According to another preferred embodiment of the present invention, the suspension rod or dead weight holder is in the form of a U-shaped channel for placing the suspension rod or dead weight for apron guidance.
According to another preferred embodiment of the present invention, the nozzle has at least a projection at the bottom for fixing onto the nozzle holder.

According to another preferred embodiment of the present invention, the nozzle is snap fitted to the nozzle holder.

According to another preferred embodiment of the present invention, the nozzle has two suction openings on the fibre material traveling side.
According to another preferred embodiment of the present invention, the suction openings have air permeable apron surmounting the nozzle.

BRIEF DESCRIPTION OF THE DRAWINGS
The accompanying drawings constitute a part of the description and are used to provide further understanding of the present invention. Such accompanying drawings illustrate the embodiments of the present invention which are used to describe the principles of the present invention together with the description.

Figure 1 illustrates isometric view of a compact spinning nozzle according to an embodiment of the present invention.

Figure 2 illustrates isometric view of a delivery roller bracket according to an embodiment of the present invention.

Figure 3 illustrates sectional view of one side of a ring spinning machine showing the delivery roller bracket mounted on a roller stand of the machine frame.

Figure 4 illustrates sectional view of the ring spinning machine showing a nozzle holder rail fixed to the delivery roller bracket.

Figure 5 illustrates sectional view of the ring spinning machine showing plurality of suction flutes.

Figure 6 illustrates sectional view of the ring spinning machine showing plurality of suspension rods or dead weights disposed onto the nozzle holder rail.

Figure 7 illustrates sectional view of the ring spinning machine showing plurality of compact suction nozzle mounted onto plurality of nozzle holders present in the nozzle holder rail according to an embodiment of the present invention.

Figure 8 illustrates sectional view of the ring spinning machine showing the delivery roller mounted onto the delivery roller bearing bracket.

Figure 9 illustrates sectional view of the ring spinning machine showing plurality of air permeable endless transport apron over the delivery roller and the compact suction nozzle.

Figure 10 illustrates sectional view of the ring spinning machine showing plurality of bottom drafting rollers disposed over the corresponding roller bearing brackets.

DETAILED DESCRIPTION OF THE INVENTION
Figure 1 illustrates the compact suction nozzle (1) used in the ring spinning machine for compact spinning, which is made as one-piece design and serves two spindles. The nozzle (1) has two suction openings (2) on the fibre material traveling side for allowing suction pressure for condensing the yarn. The apron surmounting the nozzle (1) over the suction opening (2) is air permeable type provided with perforations. The bottom portion of the nozzle (1) consists of a projection (3) for fixing the nozzle (1) onto a nozzle holder (13).

. A delivery roller bracket (4) used in the present invention is shown in figure 2. The bracket (4) is a separate component made of hard material such as Aluminum with or without alloys. The said bracket (4) has preferably two eat* shaped arrangements (5a & 5b) with openings at the centre for allowing fastening means. The bracket (4) is designed such that the delivery roller (fourth roller) shaft seats on a U-shaped recess (6) provided on the bracket (4) through known bearing means. Similarly, middle drafting roller shaft (21) (shown in figure 10) seats on another U-shaped recess (7) provided on the bracket (4) through a bearing. The bracket (4) is provided with an opening (8) in between the U-shaped recesses (6 & 7) to enable seating of the bracket (4) over a rol ler stand (9) of machine frame.
Figures 3 to 10 illustrates the sequence in which nozzle (1) is mounted with respect to a front drafting roller and a delivery roller and the same is explained in the foregoing description.

SEQUENCE OF MOUNTING THE COMPACT NOZZLE: Figure 3 illustrates that the bracket (4) is mounted onto the roller stand (9) of the machine frame wherein the roller stand (9) is fastened to the machine frame by suitable means. The roller stand (9) itself has a U-shaped recess (10) for seating the front drafting roller shaft through bearing. The bracket (4) is placed on the roller stand (9) through the opening (8) provided in the bracket (4). The bracket (4) is fastened to the roller stand (9) through the holes provided in the sides.

Figure 4 illustrates that a nozzle holder rail (11) is fastened to the bracket (4) by fasteners (12) at both the ends through the ear shaped arrangement (5) provided in the bracket (4). The nozzle holder rail (11) is provided with nozzle holders (13) for mounting the nozzles (1), The nozzle holder (13) itself includes suspension rod holders (14) and suction tube openings (15). The nozzle holder (13) has recess to receive the projection (3) provided in the top portion of the nozzle (1) shown in figure 1. The nozzle (1) is snap fitted to the nozzle holder (13). The suspension rod or dead weight holder (14) is in the form of a U-shaped channel for placing the suspension rod or dead weight for apron guidance. The ear shaped arrangements (5a & 5b) in the single bracket (4) serves for two nozzle holder rails on both sides..

Figure 5 illustrates that suction flutes (16) are fixed to the machine frame. The purpose of suction flutes (16) is for removing the fibres in case of yarn breakage and in addition removing the flies and dusts in front of the delivery roller area.

Figure 6 illustrates that plurality of suspension rods or dead weights (17) are placed over the suspension rod holders (14) for apron guiding purpose.

Figure 7 illustrates that the plurality of nozzles (1) are snap fitted to the respective nozzle holders (13) with the help of projection (3) in the nozzle (1) and the recess provided in the nozzle holder (13). The suction openings (2) of the nozzle (1) are visible at this condition and the nozzle (1) is firmly fitted to the nozzle holder (13).

Figure 8 illustrates that the delivery roller (fourth roller) shaft (18) is mounted over the U-shaped recess (6) of the bracket (4) at both the ends through bearings (not shown). The gap between the nozzle (1) and delivery roller (18) is determined by the bracket (4). Thus the compact nozzle (1) and the delivery roller (18) are integrally mounted on the bracket (4) in a predetermined position. The position of the nozzle (1) and the delivery roller (18) with respect to the front drafting roller (20) (which is shown in figure 10) is clearly defined by this mounting arrangement.

Figure 9 illustrates that air permeable transport belts or aprons (19) are mounted over the nozzle (1) and the delivery roller (18) at respective spindle positions. The apron (19) provided with perforations covers the suction opening (2) of the nozzle (1) at the top surface. The apron (19) travels over the outer path of the suspension rod (17) at the bottom surface which is not visible. The suction pressure for condensing the yarn is provided through the suction tube openings (15) shown in figure 4 from a suitable suction source which is not shown. The suction pressure reaches the inner side of nozzle (1) through suction tube (not shown) via the opening (15). The suction slot (2) provided in the nozzle (1) allows the condensing of yarn through the perforations provided over the apron (19) which is traveling over said suction slot (2).

Figure 10 illustrates that the front drafting roller (20) shaft is seated on the U-shaped recess (10) provided in the roller stand (9) of machine frame at both the ends through bearings (not shown). Thus the gap between the nozzle (1) and the front roller (20) is also defined by the bracket (4). The nozzle (1) mounting as described improves the quality of resultant compact spun yarn such as reduced hairiness, increased tensile strength, and improved coefficient of variation. Further, such nozzle mounting also improves the performance of the compact yarn ring spinning machine.

Various modifications to these embodiments are apparent to those skilled in the art from the description and drawings herein. The principles associated with the various embodiment defined herein may be applied to other embodiments. Therefore, the description is not intended to be limited to the embodiments shown along with the accompanying drawings but is to be provided broadest scope consistent with the principles and novel and inventive features describe/disclosed or suggested herein. Any modifications, equivalent substitutions, improvements etc. within the spirit and principle of the present invention shall all be included in the scope of protection of the pres'ent invention.

We claim:
1. A mounting arrangement for a compact suction nozzle (1) in drafting arrangement of a textile ring spinning machine, comprising: a roller stand (9); a bracket (4) fixed to the roller stand (9); a nozzle holder rail (11) fixed to the bracket (4) for mounting a nozzle holder (13); a nozzle (1) mounted to the nozzle holder (13).

2. The mounting arrangement as claimed in claim 1, wherein the bracket (4) has a recess (6) and a recess (7) for mounting a delivery roller (18) and a middle drafting roller (21) respectively.

3. The mounting arrangement as claimed in claim 2, wherein the gap between the nozzle (1) and the delivery roller (18) is defined by the bracket (4).

4. The mounting arrangement as claimed in claim 2, wherein the recesses (6, 7) are U-shaped.

5. The mounting arrangement as claimed in claim 1, wherein the bracket (4) has two ear shaped arrangements (5a, 5b) with openings at the centre for fastening the nozzle holder rail (11).

6. The mounting arrangement as claimed in claim 2, wherein the bracket (4) has an opening (8) between recesses (6,7) to enable seating of the bracket (4) over the roller stand (9).

7. The mounting arrangement as claimed in claim 1, wherein the nozzle holder (13) has suspension rod holders (14) and suction tube openings (15).

8. The mounting arrangement as claimed in claim 7, wherein the suspension rod or dead weight holder (14) is in the form of a U-shaped channel for placing the suspension rod or dead, weight (17) for apron guidance.

9. The mounting arrangement as claimed in claim 1, wherein the nozzle (1) has at least a projection (3) at the bottom for fixing onto the nozzle holder (13).

10. The mounting arrangement as claimed in claim 9, wherein the nozzle (1) is snap fitted to the nozzle holder (13).

11. The mounting arrangement as claimed in claim 1, wherein the nozzle (i) has two suction openings (2) on the fibre material traveling side.

12. The mounting arrangement as claimed in claim 11, wherein the suction openings (2) have air permeable apron (19) surmounting the nozzle (1).