DESC:FIELD
The present invention relates to flat tops of carding machines.
BACKGROUND
The background information herein below relates to the present disclosure but is not necessarily prior art.
In a carding machine, the main process of separating individual fibres (also known as the carding process) takes place between the wire points of the cylinder and the wire points of the flat tops. Conventionally, a metallic card clothing is mounted on the main cylinder, while the tops are mounted on flat bars which are fitted on a revolving chain. Fibre tufts are fed into the carding machine through a licker-in 1, and transferred to the cylinder configured to rotate at a high speed, which may go up to 600 RPM, to induce the carding effect. At the same time, the high speed of the cylinder creates a huge air current around it. The cylinder wire points carry the tufts, and pass it through the flat bar wire points, to clean the fibres of impurities. The cleaned cotton is then carried by the cylinder wire points and taken out by doffer of the carding machine.
The effectiveness of the carding process depends on the positioning of the wire points on the tops. To produce an even carding effect, it is imperative that the flat wire points are evenly distributed on the tops. It is also important that the setting design of the wire point in the tops should be such that the tops remain relatively clean during its working for a longer time. Usually, the impurities on the flat tops are cleared away by the air current passing therethrough. The passage of the air is facilitated by the passages defined in between the wire points of the cylinder and the wire points of the flat tops.
However, conventionally known configurations of the wire points of the flat tops are such that when they have a relatively wider lane width "A" in a vertical direction, the lane ‘B” in diagonal direction is nearer to the wire take-up distance line. When the lane widths of vertical airflow channel “A” is made relatively narrower to increase the carding efficiency, the air flow lane “B” moves away from the vertical line. As a result, the diagonal air flow lane becomes relatively longer, thereby clogging the tops at a faster rate with impurities and fibre fragments, and rendering them ineffective. As the revolving flats are only cleaned once they come out of the carding zone, faster clogging of the flat tops results in inferior carding action, thereby causing deterioration of the quality of the output material.
There is therefore felt a need for a flat top for the carding machine that alleviates the aforementioned drawbacks.
OBJECTS
Some of the objects of the present disclosure, which at least one embodiment herein satisfies, are as follows:
An object of the present disclosure is to provide a flat top for a carding machine.
Another object of the present disclosure is to provide a flat top for a carding machine which provides relatively improved cleaning of the impurities collected thereon, while performing the carding operation.
Yet another object of the present disclosure is to provide a flat top for a carding machine which improves the carding efficiency, thereby improving the quality of the fibre output.
Other objects and advantages of the present disclosure will be more apparent from the following description, which is not intended to limit the scope of the present disclosure.
SUMMARY
The present disclosure envisages a flat top for the carding machine. The flat top comprises a flat bar and a card clothing affixed over the flat bar. The card clothing comprises a card clothing foundation and a plurality of arrays of wire staples provided on the card clothing foundation to define a plurality of first airflow channels between the wire staples. Each array is defined by a plurality of wire staples offset to each other by a predetermined distance to define a plurality of second airflow channels therebetween. Each second airflow channel comprises a plurality of airflow lanes.
In an embodiment, the first airflow channels are parallel to an operative vertical axis.
In an embodiment, the wire staple has a U-shaped configuration defined by a crown and a pair of legs having pointed ends. The pair of legs is configured to extend from the crown.
In another embodiment, each wire staple is configured to be punched through the card clothing foundation such that the legs of the wire staple protrude out through the operative surface of the card clothing foundation to facilitate the carding action of fibre-tufts.
In yet another embodiment, the wire staple has a cross-sectional configuration selected from the group consisting of round, elliptical, ovoid, rectangular or triangular.
In still another embodiment, the wire take-up distance defined between the staples is configured to incrementally reduce from the first staple row to the last row.
In an embodiment, the staple rows are configured to be angularly disposed with respect to the vertical axis initially by a first predetermined acute angle, then by a second predetermined obtuse angle, and thereafter by a third predetermined acute angle.
In a first embodiment, the staple rows are configured to be angularly disposed with respect to the vertical axis initially by the first predetermined angle ranging from 60° to 70°, then by the second predetermined angle ranging from 95°-99°, and thereafter by the third predetermined angle ranging from 75°-79° to define the plurality of airflow lanes.
In yet another embodiment, the width of the first airflow channel ranges from 0.1mm to 1mm.
In still another embodiment, the width of the second airflow lanes ranges from 1mm to 2mm.
In a second embodiment, the staple rows are configured to be angularly disposed with respect to the vertical axis initially by the first predetermined angle ranging from 60° to 65°, then by the second predetermined angle ranging from 31°-35°, and thereafter by the third predetermined angle ranging from 95°-99° to define a first airflow lane, a second airflow lane, a third airflow lane and a fourth airflow lane.
In another embodiment, the width of the first airflow channel ranges from 0.1mm to 1mm.
In yet another embodiment, the width of the first airflow lane ranges from 1mm to 2mm.
In still another embodiment, the width of the second airflow lane ranges from 1mm to 2.5mm.
In another embodiment, the width of the third airflow lane ranges from 1mm to 2mm.
In yet another embodiment, the width of the fourth airflow lane ranges from 2mm to 3mm.
The present disclosure further envisages a carding machine comprising a rotating cylinder, a liker-in configured to be in communication with the cylinder, and configured to rotate in a direction opposite to the direction of rotation of the cylinder, a doffer configured to be in communication with the cylinder, and is configured to rotate in a direction opposite to the direction of rotation of the cylinder. The machine further comprises a conveyor configured to revolvingly abut the cylinder. The conveyor has a plurality of flat tops mounted thereon to enable carding of fibre-tufts fed between the flat tops and the cylinder to produce fibre webs. Each flat top comprises a flat bar and a card clothing affixed over the flat bar. The card clothing comprises a card clothing foundation, and a plurality of arrays of wire staples provided on the card clothing foundation defining a plurality of first airflow channels between the wire staples. Each array is defined by a plurality of wire staples offset to each other by a predetermined distance to define a plurality of second airflow channels therebetween. Each second airflow channel comprises a plurality of airflow lanes.
BRIEF DESCRIPTION OF THE ACCOMPANYING DRAWING
A flat top for a carding machine, of the present disclosure will now be described with the help of the accompanying drawing, in which:
Figure 1 illustrates a schematic view of the carding machine, in accordance with an aspect of the present disclosure;
Figure 2A illustrates a cross sectional view of the card clothing of a flat top of the machine;
Figure 2B illustrates a leg of a wire staple punched onto the top;
Figure 3A and Figure 3B illustrates a schematic view of the first embodiment of staple rows; and
Figure 4A and Figure 4B illustrates a schematic view of the second embodiment of staple rows.
LIST OF REFERENCE NUMERALS
100 Carding machine
1 Cylinder
2 Liker-in
3 Conveyor of flat tops
3a Flat top
3aa Flat bar
3b Wire staple
3c Crown of the wire staple
3d Leg of the wire staple
4 Doffer
5 Foundation of flat top
5a Cotton-ply
5b VIR surface
10 First embodiment of card clothing
20 Second embodiment of card clothing
P vertical axis
Q horizontal axis
A first airflow channel
B first airflow lane
B1 second airflow lane
B2 third airflow lane
B3 fourth airflow lane
C wire take-up distance
DETAILED DESCRIPTION
Embodiments, of the present disclosure, will now be described with reference to the accompanying drawing.
Embodiments are provided so as to thoroughly and fully convey the scope of the present disclosure to the person skilled in the art. Numerous details are set forth, relating to specific components, and methods, to provide a complete understanding of embodiments of the present disclosure. It will be apparent to the person skilled in the art that the details provided in the embodiments should not be construed to limit the scope of the present disclosure. In some embodiments, well-known processes, well-known apparatus structures, and well-known techniques are not described in detail.
The terminology used, in the present disclosure, is only for the purpose of explaining a particular embodiment and such terminology shall not be considered to limit the scope of the present disclosure. As used in the present disclosure, the forms “a”, “an” and “the” may be intended to include the plural forms as well, unless the context clearly suggests otherwise. The terms “comprises”, “comprising”, “including”, “includes” and “having” are open-ended transitional phrases and therefore specify the presence of stated features, elements, modules, units and/or components, but do not forbid the presence or addition of one or more other features, elements, components, and/or groups thereof.
A carding machine 100 (hereinafter referred to as ‘the machine 100’), as illustrated in Figure 1, includes a rotating cylinder 1 configured to be in communication with a liker-in 2 and a doffer 4. The liker-in 2 and the doffer 4 are configured to rotate in a direction opposite to the direction of rotation of the cylinder 1. The machine 100 further includes a conveyor 3, having a plurality of flat tops 3a, configured to revolvingly abut the cylinder 1.
Fibre-tufts are fed to the liker-in 2, from where the tufts are passed between the flat tops 3a and the cylinder 1 to facilitate preparation of fibre webs. The opened fibre webs are passed through the doffer 4 and thereafter led to the output as slivers of fibres.
A flat top 3a, of the present disclosure, for the carding machine 100 will now be described in detail with reference to Figure 2A through Figure 4B.
The flat top 3a comprises a flat top card clothing 10, 20 affixed over a flat bar 3aa. The flat top card clothing 10, 20 comprises a card clothing foundation 5 which is made of a plurality of cotton-ply 5a bonded with rubber based gum and having a Vulcanized Indian Rubber (VIR) surface 5b provided on the operative top surface of the cotton-ply 5a.
The card clothing 10, 20 further comprises a plurality of arrays of hardened and tempered steel wire staples 3b that are punched through the card clothing foundation 5 such that free ends of the staples 3b protrude out through the operative surface of the card clothing foundation 5. The wire staple 3b is formed by bending a wire in the form of U, having a square base called as the crown 3c and two legs 3d (as shown in Figure 2A). In an embodiment, the wire has a cross-sectional configuration selected from the group consisting of round, elliptical, ovoid, rectangular or triangular. The legs 3d of the wire staple 3b are ground to make both the legs 3d with pointed tip, so as to function the carding action.
In an embodiment, the metallic card clothing 10, 20 is wound around the cylinder 1. In another embodiment, the card clothing 10, 20 (as shown in Figure 2A) is suitably clipped on the rigid flat bars 3aa with a metal plate to form the flat top 3a.
The plurality of arrays of wire staples 3b defines a plurality of first airflow channels A between the wire staples 3b. In an embodiment, the first airflow channels A are parallel to an operative vertical axis P (as shown in Figures 3A through 4B).
The wire staples, of each array, are configured to be offset to each other by a predetermined distance S1, S2 ... Sn to define a plurality of second air-flow channels therebetween. Each second airflow channel comprises a plurality of airflow lanes B, B1…Bn that form an offset pattern of the second airflow channel. The airflow lanes B, B1… Bn are configured to allow air to pass therethrough, a predetermined velocity, to air in clearing away the impurities held between the legs of the wire staples while carding the fibre-tufts.
In an embodiment, as shown in Figure 3A and Figure 3B, the card clothing foundation 5 includes at least two arrays of the wire staples 3b.
In an embodiment, the staple rows are configured to be angularly disposed with respect to the vertical axis P initially by a first predetermined acute angle X, then by a second predetermined obtuse angle Y, and thereafter by a third predetermined acute angle Z.
In a first embodiment, the card clothing foundation 5 comprises a first array comprising a first set of staple rows having wire staples offset to each other by a specific off-set distance S1 defining a first airflow channel A and a diagonal or oblique second airflow channel between the wire staples. The second airflow channel is configured to allow air to flow therethrough. The foundation further comprises a second array of wire staples offset at a distance of S2 such that the direction of the second airflow channel deflects from the first array to the second array.
In an embodiment, this change in the offset of the staples 3b is repeated after a predetermined number of staple rows, thereby creating a deflection in the angular air flow lane direction. As the air flows through the shorter route available, it always follows the wider lanes thus created in the first embodiment with multiple setting combinations in the same top 3a. Figure 3B illustrates off-sets of S1 and S2 configured on the top 3a.
In another embodiment, the wire take-up distance C defined between the staples 3b is configured to incrementally reduce from the first staple row to the last row (more specifically described as from bottom row to top row depicted in Figures 3B and 4B).
In one embodiment, the staple rows are configured to be angularly disposed with respect to the vertical axis P initially by a first predetermined acute angle X, then by a second predetermined obtuse angle Y, and thereafter by a third predetermined acute angle Z.
In an embodiment, the X-angle ranges from 60°-70°. In another embodiment, the Y-angle ranges from 95°-99°. In yet another embodiment, the Z-angle ranges from 75°-79°. In one embodiment, the off-set S1 ranges between 1mm to 2mm. In another embodiment, the off-set S2 ranges between 1mm to 2.5mm. In another embodiment, it is required that the off-set S1 has a value different from the value of the off-set S2.
In an embodiment, the width of the first airflow channel A ranges from 0.1mm to 1mm.
In an embodiment, the width of the second airflow channel ranges from 1mm to 2mm.
In a second embodiment, as in Figure 4A and Figure 4B, the staple arrays are set adjacent to each other such that the setting configuration is repeated after different number of staple rows, i.e., while in the first setting, the off-set S1 is made for a first number of rows and then a different setting is done with a second off-set S2. Then once again the same off-set sequence is repeated to get shorter airflow deflections after a specific number of staple rows. By implementing this specific multiple setting configuration on the same top 3a, the vertical air flow lanes are configured closer to each other, thereby helping in cleaning of the tops 3a while keeping the flat tops 3a active during the carding operation.
In yet another embodiment, the second airflow channel comprises a plurality of airflow lanes B, B1, B2 and B3 that are deflected by X, X1, Y, Y1, Z, and Z1 angles. In an embodiment, the X-angle ranges from 60°-65°. In an embodiment, the X1-angle ranges from 60°-65°. In another embodiment, the Y-angle ranges from 31°-35°. In another embodiment, the Y1-angle ranges from 31°-35°. In yet another embodiment, the Z-angle ranges from 95°-99°. In yet another embodiment, the Z1-angle ranges from 95°-99°.In one embodiment, the off-set S1 ranges between 1mm to 2mm. In another embodiment, the off-set S2 ranges between 1mm to 2.5mm. In another embodiment, it is required that the off-set S1 has a value different from the value of the off-set S2.
In an embodiment, the width of the first airflow channel A ranges from 0.1mm to 1mm.
In an embodiment, the width of the first airflow lane B ranges from 1 mm to 2mm. In yet another embodiment, the width of the second airflow lane B1 ranges from 1mm to 2.5mm. In still another embodiment, the width of the third airflow lane B2 ranges from 1mm to 2mm. In yet another embodiment, the width of the fourth airflow lane B3 ranges from 2mm to 3mm.
In one embodiment, the population of the wire points is increased gradually by making the gap between the staple rows relatively narrower. This ensures gradual increase in the carding operation while keeping the width of the first airflow channel A narrower and deflecting the air flow lane.
By narrowing the wire take-up distance, and bringing the air flow channels A closer to each other by alternately changing the direction of the second airflow channel , it is ensured that the air flow enables cleaning of the tops 3a and keeps the tops 3a free from impurities getting clogged in the wire points. As a result, the tops 3a are maintained clog-free for a longer duration of time to perform the carding operation while it traverses along the flat zone of the cylinder 1. In an embodiment, the intensity of carding can be also enhanced gradually by increasing the wire point population in the flat tops 3a.
The flat top 3a, of the present disclosure, thus provides relatively improved cleaning of the impurities collected thereon, while performing the carding operation. Further, it improves the carding efficiency, thereby improving the quality of the fibre output, and simultaneously increasing the productivity of the carding machine.
In an embodiment, the card clothing foundation 5 includes 30 to 60 numbers of wire staples are arranged thereon.
The present disclosure further envisages a carding machine 100 comprising a rotating cylinder 1, a liker-in 2 configured to be in communication with the cylinder 1, and configured to rotate in a direction opposite to the direction of rotation of the cylinder, and a doffer 4 configured to be in communication with the cylinder 1, and configured to rotate in a direction opposite to the direction of rotation of the cylinder 1. The machine 100 further comprises a conveyor 3 configured to revolvingly abut the cylinder 1. The conveyor 3 has a plurality of flat tops 3a mounted thereon to enable carding of fibre-tufts fed between the flat tops 3a and the cylinder 1 to produce fibre webs. Each flat top 3a is defined by a flat bar 3aa and a card clothing 10, 20 affixed over the flat bar 3aa.
The card clothing 10, 20 comprises a card clothing foundation 5, and a plurality of arrays of wire staples 3b provided on the card clothing foundation 5 to define a plurality of first airflow lanes A between the wire staples 3b. Each array is defined by a plurality of wire staples 3b offset to each other by a predetermined distance S1, S2 ... Sn to define a plurality of second airflow channels therebetween. Each second airflow channel comprises a plurality of airflow lanes B, B1… Bn forming an offset pattern of the second airflow channel.
In an exemplary embodiment, a carding machine provided with the flat tops of the present disclosure was run at varying delivery speeds ranging from 100-180mtrs/min.
It was observed that the Neps Removal Efficiency (NRE) of the machine 100, provided with the flat tops of the present disclosure, increased when the delivery speed was raised from 100mtrs/min to 110 mtrs/min and then gradually to 120mtrs/min. It was inferred that due to the particular array of the staples, at a speed of 110mtrs/min, the optimum cleaning efficiency observed was of 87.03%, while at a speed of 170mtrs/min the optimum efficiency observed was 84.95%.
After carding 649 tonnes of fibres, it was seen that the NRE reduced by around 45%, however the cleaning efficiency was affected to the minimum, i.e., to 81.75%. The reduction in NRE can be attributed to the fact that the tops were old and had already processed 649 tonnes of fibres.
The foregoing description of the embodiments has been provided for purposes of illustration and not intended to limit the scope of the present disclosure. Individual components of a particular embodiment are generally not limited to that particular embodiment, but, are interchangeable. Such variations are not to be regarded as a departure from the present disclosure, and all such modifications are considered to be within the scope of the present disclosure.
TECHNICAL ADVANCEMENTS
The present disclosure described hereinabove has several technical advantages including, but not limited to, the realization of a flat top for a carding machine which:
• provides relatively improved cleaning of the impurities collected thereon, while performing the carding operation;
• improves the carding efficiency, thereby improving the quality of the fibre output; and
• increases productivity of the carding machine.
The foregoing disclosure has been described with reference to the accompanying embodiments which do not limit the scope and ambit of the disclosure. The description provided is purely by way of example and illustration.
The embodiments herein and the various features and advantageous details thereof are explained with reference to the non-limiting embodiments in the following description. Descriptions of well-known components and processing techniques are omitted so as to not unnecessarily obscure the embodiments herein. The examples used herein are intended merely to facilitate an understanding of ways in which the embodiments herein may be practiced and to further enable those of skill in the art to practice the embodiments herein. Accordingly, the examples should not be construed as limiting the scope of the embodiments herein.
The foregoing description of the specific embodiments so fully reveal the general nature of the embodiments herein that others can, by applying current knowledge, readily modify and/or adapt for various applications such specific embodiments without departing from the generic concept, and, therefore, such adaptations and modifications should and are intended to be comprehended within the meaning and range of equivalents of the disclosed embodiments. It is to be understood that the phraseology or terminology employed herein is for the purpose of description and not of limitation. Therefore, while the embodiments herein have been described in terms of preferred embodiments, those skilled in the art will recognize that the embodiments herein can be practiced with modification within the spirit and scope of the embodiments as described herein.
Any discussion of materials, devices, articles or the like that has been included in this specification is solely for the purpose of providing a context for the disclosure. It is not to be taken as an admission that any or all of these matters form a part of the prior art base or were common general knowledge in the field relevant to the disclosure as it existed anywhere before the priority date of this application.
The numerical values mentioned for the various physical parameters, dimensions or quantities are only approximations and it is envisaged that the values higher/lower than the numerical values assigned to the parameters, dimensions or quantities fall within the scope of the disclosure, unless there is a statement in the specification specific to the contrary.
While considerable emphasis has been placed herein on the components and component parts of the preferred embodiments, it will be appreciated that many embodiments can be made and that many changes can be made in the preferred embodiments without departing from the principles of the disclosure. These and other changes in the preferred embodiment as well as other embodiments of the disclosure will be apparent to those skilled in the art from the disclosure herein, whereby it is to be distinctly understood that the foregoing descriptive matter is to be interpreted merely as illustrative of the disclosure and not as a limitation. ,CLAIMS:WE CLAIM:
1. A flat top (3a) for a carding machine (100), said flat top (3a) comprising:
• a flat bar (3aa); and
• a card clothing (10, 20) affixed over said flat bar (3aa), said card clothing (10, 20) comprising:
o a card clothing foundation (5); and
o a plurality of arrays of wire staples (3b) provided on said card clothing foundation (5) to define a plurality of first airflow channels (A) between said wire staples (3b),
wherein, each array is defined by a plurality of wire staples (3b) offset to each other by a predetermined distance (S1, S2 … Sn) to define a plurality of second airflow channels therebetween, each of said airflow channel comprising a plurality of airflow lanes (B, B1…Bn).
2. The flat top (3a) as claimed in claim 1, wherein said first airflow channels (A) are parallel to an operative vertical axis (P).
3. The flat top (3a) as claimed in claim 1, wherein said wire staple (3b) has a U-shaped configuration defined by a crown (3c) and a pair of legs (3d) having pointed ends, said pair of legs (3d) being configured to extend from said crown (3c).
4. The flat top (3a) as claimed in claim 1, wherein each wire staple (3b) is configured to be punched through the card clothing foundation (5) such that the legs (3d) of said wire staple (3b) protrude out through the operative surface of the card clothing foundation (5) to facilitate the carding action of fibre-tufts.
5. The flat top (3a) as claimed in claim 1, wherein said wire staple (3b) has a cross-sectional configuration selected from the group consisting of round, elliptical, ovoid, rectangular or triangular.
6. The flat top (3a) as claimed in claim 1, wherein the wire take-up distance (C) defined between said staples is configured to be incrementally reduced from the first staple row to the last row.
7. The flat top (3a) as claimed in claim 1, wherein said staple rows are configured to be angularly disposed with respect to the vertical axis (P) initially by a first predetermined acute angle (X), then by a second predetermined obtuse angle (Y), and thereafter by a third predetermined acute angle (Z).
8. The flat top (3a) as claimed in claim 1, wherein said staple rows are configured to be angularly disposed with respect to the vertical axis (P) initially by said first predetermined angle (X) ranging from 60° to 70°, then by said second predetermined angle (Y) ranging from 95°-99°, and thereafter by said third predetermined angle (Z) ranging from 75°-79° to define said plurality of airflow lanes (B, B1, … Bn).
9. The flat top (3a) as claimed in claim 8, wherein the width of said first airflow channel (A) ranges from 0.1mm to 1mm.
10. The flat top (3a) as claimed in claim 8, wherein the width of said airflow lanes (B, B1… Bn) ranges from 1mm to 2mm.
11. The flat top (3a) as claimed in claim 1, wherein said staple rows are configured to be angularly disposed with respect to the vertical axis (P) initially by said first predetermined angle (X, X1..Xn) ranging from 60° to 65°, then by said second predetermined angle (Y, Y1…Yn) ranging from 31°-35°, and thereafter by said third predetermined angle (Z, Z1…Zn) ranging from 95°-99° to define a first airflow lane (B), a second airflow lane (B1), a third airflow lane (B2) and a fourth airflow lane (B3).
12. The flat top (3a) as claimed in claim 11, wherein the width of the first airflow channel (A) ranges from 0.1mm to 1mm.
13. The flat top (3a) as claimed in claim 11, wherein the width of said first airflow lane (B) ranges from 1mm to 2mm.
14. The flat top (3a) as claimed in claim 11, wherein the width of said second airflow lane (B1) ranges from 1mm to 2.5mm.
15. The flat top (3a) as claimed in claim 11, wherein the width of said third airflow lane (B2) ranges from 1mm to 2mm.
16. The flat top (3a) as claimed in claim 11, wherein the width of said fourth airflow lane (B3) ranges from 2mm to 3mm.
17. A carding machine (100) comprising:
• a rotating cylinder (1)
• a liker-in (2) configured to be in communication with said cylinder (1), said liker-in (2) configured to rotate in a direction opposite to the direction of rotation of the cylinder (1);
• a doffer (4) configured to be in communication with said cylinder (1), said doffer (4) configured to rotate in a direction opposite to the direction of rotation of the cylinder (1);
• a conveyor (3) configured to revolvingly abut the cylinder (1), said conveyor (3) having a plurality of flat tops (3a) mounted thereon to enable carding of fibre-tufts fed between said flat tops (3a) and said cylinder (1) to produce fibre webs;
wherein each flat top (3a) is defined by:
o a flat bar (3aa); and
o a card clothing (10, 20) affixed over said flat bar (3aa), said card clothing (10, 20) comprising:
? a card clothing foundation (5); and
? a plurality of arrays of wire staples (3b) provided on said card clothing foundation (5) to define a plurality of first airflow channels (A) between the wire staples (3b),
wherein, each array defined by a plurality of wire staples (3b) offset to each other by a predetermined distance (S1, S2... Sn) to define a plurality of second airflow channels therebetween, each of said second airflow channel comprising a plurality of airflow lanes (B, B1…Bn).

Dated this 20th day of October, 2022

_______________________________
MOHAN RAJKUMAR DEWAN, IN/PA – 25
of R.K.DEWAN & CO.
Authorized Agent of Applicant

TO,
THE CONTROLLER OF PATENTS
THE PATENT OFFICE, AT MUMBAI