FORM 2
THE PATENTS ACT, 1970
(39 of 1970)
&
THE PATENTS RULES, 2003
COMPLETE SPECIFICATION (See section 10, rule 13)
1. Title of the invention: A TYRE SIDEWALL BUFFING APPARATUS
2. Applicant(s)
NAME NATIONALITY ADDRESS
CEAT LIMITED Indian RPG House, 463, Dr. Annie Besant Road, Worli, Mumbai- Maharashtra 400030, India
3. Preamble to the description
COMPLETE SPECIFICATION
The following specification particularly describes the invention and the manner in which it
is to be performed.

BACKGROUND
[0001] Tyres are a crucial component of an automobile. In an
automobile, a tyre may be responsible for a plurality of functions. A final manufactured tyre may be required to conform to a plurality of industry and safety standards, owing to which, the tyre may be imprinted with a visual representation in the form of a white embossed rubber during manufacturing. Such visual representation may include a set of alphanumeric characters, symbols, logo, etc. However, during subsequent steps of tyre manufacturing, the embossed white rubber may tend to get distorted or spoiled. As a result, the tyre may be required to be buffed.
BRIEF DESCRIPTION OF THE DRAWINGS
[0002] The following detailed description references the drawings,
wherein:
[0003] FIG. 1 illustrates a front view of an exemplary tyre sidewall
buffing apparatus for buffing a sidewall of a tyre, as per an implementation
of the present subject matter;
[0004] FIG. 2 illustrates a side view of an exemplary tyre sidewall
buffing apparatus for buffing a sidewall of a tyre, as per an implementation
of the present subject matter;
[0005] FIG. 3 illustrates a magnified view of an exemplary tyre sidewall
buffing apparatus, in operation, for buffing a sidewall of a tyre, as per an
implementation of the present subject matter; and
[0006] FIG. 4 illustrates a front view of an exemplary tyre with a first
buffing wheel and a second buffing wheel, as per an implementation of the
present subject matter.
[0007] Throughout the drawings, identical reference numbers
designate similar, but not necessarily identical elements. The figures are
not necessarily to scale, and the size of some parts may be exaggerated
to more clearly illustrate the example shown. Moreover, the drawings

provide examples and/or implementations consistent with the description; however, the description is not limited to the examples and/or implementations provided in the drawings.
DETAILED DESCRIPTION
[0008] Vehicles have become an essential requirement for private
individuals as well as for commercial purposes. As would be generally understood, a tyre is one of the most essential and critical component of a vehicle. During vehicle operation, a tyre is the only source of contact between the vehicle and the road, owing to which, a plurality of dynamics of the vehicle operation may be controlled by the tyre. The tyres may be responsible for guiding and maintaining the alignment and movement of a vehicle while driving. In addition, the tyres contribute to the safety of the vehicle while carrying loads, and when the automobile is to be halted by application of brakes.
[0009] Owing to the complexity of roles performed by the tyres in a
vehicle, it may be crucial for tyre manufacturers to conform to the adequate quality parameters during any tyre manufacturing process. The final manufactured tyre may also be required to conform to certain industry parameters before installing them in vehicles.
[0010] As would be understood, the tyre, during manufacturing, may be
subjected to different processes. During one of such processes, a visual representation may be imprinted on the sidewall of the tyres. Such visual representation may be printed in the form of an embossed white rubber on the sidewall of the tyres. In one example, such embossed visual representation may correspond to the brand name of the manufacturer of the tyre. In another example, such visual representation may correspond to a unique identification number provided by the manufacturers on the tyres. In yet another example, such visual representation may correspond to a set of alphanumeric characters depicting compatibility of the corresponding tyre with a set of vehicles. In yet another example, such visual representation

may correspond to numerals pertaining to certain industry usage parameters such as maximum sustainable speed of the tyre, maximum load capacity, etc. Any other type of special characters, logos, or symbols may also be imprinted on the tyre in the form of white embossed rubber during manufacturing.
[0011] During tyre manufacturing process, the tyre with imprinted visual
representation in the form of white rubber, may then be subjected to subsequent processes of the tyre manufacturing. It may be possible for the white rubber on the sidewall of the tyre, during subsequent processes, to get spoiled or distorted. For example, during one of the processes, impurities or dirt may distort the sidewall white rubber. For another example, during vulcanization, the black rubber that may be used for manufacturing the tyre may tend to overlap on the white rubber on the sidewall, thereby distorting the appearance of the visual representation.
[0012] As a result, the sidewall of the tyre may be required to be buffed
to make the visual representation on the sidewall to appear prominently and smoothly. During sidewall buffing, the tyre may be placed inside a buffing apparatus. The buffing apparatus may include buffing wheel, also referred to as grinding wheel. The tyre may be positioned in such a manner that, during sidewall buffing process, the tyre may be rotated along an axis. The buffing wheel may come in contact with the selective locations on the sidewall of the tyre where the visual representation was imprinted, and the top layer at those selective locations of the tyre may be buffed off, thereby exposing the layer of white rubber beneath. As a result, post buffing, the visual representation in the form of the white rubber on the sidewall of the tyre may appear prominently.
[0013] However, the conventional and existing approaches used for
buffing the sidewall of the tyre may be inefficient. The buffing wheel, during rotation of the tyre, may need to come in contact with only selective locations on the sidewall of the tyre where the visual representation is imprinted. It may be the case that the buffing wheel may not be able to properly buff off

the top layer at only those selective locations. During buffing, it may be possible that other undesirable areas, other than the intended areas, may be buffed off inadvertently. As a result, not only it may hamper the appearance of the white rubber of the visual representation on the sidewall of the tyre, but may also damage other portions of the tyre. As a further result, the quality of the tyres may also compromise. This problem may be further aggravated in cases where the sidewall which needs to be buffed may require complex detailing. In such cases, the conventional and existing buffing techniques may be unable to buff the tyre and the final tyre obtained post buffing may be of inappropriate quality.
[0014] To this end, approaches for buffing a sidewall of a tyre, in a tyre
sidewall buffing apparatus, to improve the sidewall visual representation
appearance and quality of the final manufactured tyre are described. In one
example, the tyre sidewall buffing apparatus may include a bottom half rim
and a top half rim. The top half rim may be pressed against the bottom half
rim to form a buffing cavity. The buffing cavity thus formed may be such that
it may have a longitudinally extending axis. The tyre sidewall buffing
apparatus may further include a rotating means capable of rotating a tyre
semi-annularly about the longitudinally extending axis of the buffing cavity.
[0015] A tyre may be positioned and secured in the buffing cavity with its
sidewall facing upwards. In one example, the rotating means may cause the tyre to rotate about 180° in a clockwise direction and about 180° in an anti¬clockwise direction about the longitudinally extending axis of the buffing cavity. In another example, the rotating means may be a tyre rotation motor assembly. However, any other means may also be used to rotate the tyre semi-annularly about the axis of the buffing cavity without deviating from the scope of the present subject matter.
[0016] Continuing with the present example, the tyre sidewall buffing
apparatus may further include a first buffing wheel positioned along the upward facing sidewall of the tyre and inclined with the longitudinally extending axis of the buffing cavity. The first buffing wheel may be used to

perform a coarse buffing on the sidewall of the tyre, and may be used to buff the areas on the sidewall of the tyre which may not require much detailing. In one example, the first buffing wheel may have a rough surface and a larger radius. In another example, the first buffing wheel may be of a material comprising tungsten carbide.
[0017] The tyre sidewall buffing apparatus may furthermore include a
second buffing wheel diametrically opposite to the first buffing wheel. The second buffing wheel may also be positioned along the upward facing sidewall of the tyre and inclined with the longitudinally extending axis of the buffing cavity. The second buffing wheel may be used to perform a fine buffing on the sidewall of the tyre. The second buffing wheel may be used to buff the complex areas of the sidewall, and to smoothen the edges of the portions which may already have been buffed by the first buffing wheel. In one example, the second buffing wheel may have a smooth surface and a smaller radius. In another example, the second buffing wheel may also be of a material comprising tungsten carbide. However, it may be noted that the aforementioned example of the materials of the first buffing wheel and the second buffing wheel are only exemplary, and should not be construed to limit the scope of the present subject matter in any manner. The first buffing wheel and the second buffing wheel may be of any other material without deviating from the scope of the present subject matter.
[0018] The tyre, during manufacturing, may be imprinted with a set of
visual representation along the sidewall of the tyre. The visual representation may be imprinted on the sidewall of the tyre in the form of an embossed white rubber. Thereafter, the tyre with the imprinted visual representation may then be subjected to other subsequent steps of the tyre manufacturing process. The embossed white rubber of the imprinted visual representation, during the subsequent steps, may tend to get spoiled or distorted, and the tyre may then be required to be buffed.
[0019] In operation, as per an implementation of the present subject
matter, the tyre may be positioned in the buffing cavity with the sidewall of

the tyre facing upwards. The top half rim may be pressed against the bottom half rim to secure the tyre. In one example, the tyre sidewall buffing apparatus may be powered pneumatically, i.e., using compressed air mechanism. In such cases, the top half rim may be pressed against the bottom half rim using pneumatic mechanism. It may be noted that above example is only illustrative, and other mechanisms may also be used to perform various operations of the tyre sidewall buffing apparatus without deviating from the scope of the present subject matter.
[0020] Continuing with the present example, a controller may be
communicatively coupled to the tyre sidewall buffing apparatus. A user of the
tyre sidewall buffing apparatus may provide a buffing input to the controller.
The buffing input may be based on a sidewall profile of the tyre and a
plurality of buffing locations on the sidewall of the tyre. As would be
understood, the sidewall profile of the tyre may correspond to the
dimensions of the tyre to be buffed. Further, the plurality of buffing locations
may refer to the locations on the sidewall of the tyre where the visual
representation in the form of embossed white rubber may be present.
[0021] Continuing further, based on the buffing input, the controller may
determine an angle of inclination of the first buffing wheel and the second buffing wheel. Based on the determined angle of inclination, the controller may then cause the first buffing wheel and the second buffing wheel to incline with the longitudinally extending axis of the buffing cavity. In one example, the tyre sidewall buffing apparatus may include an inclination system mechanically coupled to the first buffing wheel and the second buffing wheel. In such cases, based on the determined angle of inclination, the controller may cause the inclination system to incline the first buffing wheel and the second buffing wheel with the longitudinally extending axis of the buffing cavity. However, it may be noted that any other type of technique known to a person skilled in the art may also be used to incline the first buffing wheel and the second buffing wheel with the longitudinally extending axis of the buffing cavity without deviating from the scope of the present

subject matter.
[0022] Upon determining the angle of inclination of the first buffing wheel
and the second buffing wheel, the controller may then cause the rotating means to semi-annularly rotate the tyre about the longitudinally extending axis of the buffing cavity. The semi-annular rotation of the tyre about the longitudinally extending axis of the buffing cavity may be such, that the inclined first buffing wheel and the inclined second buffing wheel may efficiently come in contact with the plurality of buffing locations on the curvature of the sidewall of the tyre.
[0023] As would be appreciated, the approaches of the present subject
matter may buff the sidewall of the tyre to improve the sidewall visual representation appearance and quality of the final manufactured tyre. The use of a first buffing wheel and a second buffing wheel for performing coarse buffing and fine buffing respectively, may improve the appearance and accuracy of the visual representation on the sidewall of the tyre. The first buffing wheel may buff those locations on the tyre which may not require much detailing, and the second buffing wheel may smoothen the edges and finalize the buffing process. The use of dual buffing wheels may also ensure to refrain the unintentional locations on the sidewall of the tyre to get inadvertently buffed.
[0024] Further, the inclination of the first buffing wheel and the second
buffing wheel may provide a plurality of planes at different angles with the longitudinally extending axis of the tyre through which the buffing may be performed. The different planes for buffing the sidewall of the tyre may, in turn, ensure the buffing of the sidewall of the tyre along all the curved surfaces of the tyre efficiently, thereby making the white rubber of the imprinted visual representation to appear prominently. The inclination of the first buffing wheel and the second buffing wheel may further provide better controlling of the buffing process, thereby enabling better rendering of the visual representation on the curvature of the sidewall of the tyre. Furthermore, the semi-annular rotation may further aid in increasing the

precision, thereby improving the appearance and quality of the final manufactured tyre. Even further, the use of pneumatic mechanism for various operations of the tyre sidewall buffing apparatus may result in reduction in the manufacturing cost of the tyre, saving of consumable fluids, such as oils, etc.
[0025] The present subject matter is further described with reference to
the accompanying figures. Wherever possible, the same reference numerals are used in the figures and the following description to refer to the same or similar parts. It should be noted that the description and figures merely illustrate principles of the present subject matter. It is thus understood that various arrangements may be devised that, although not explicitly described or shown herein, encompass the principles of the present subject matter. Moreover, all statements herein reciting principles, aspects, and examples of the present subject matter, as well as specific examples thereof, are intended to encompass equivalents thereof. The manner in which the example tyre sidewall buffing apparatus is implemented is explained in detail with respect to FIGS. 1-4.
[0026] FIG. 1 and FIG. 2 illustrates a front view and a side view
respectively, of an exemplary tyre sidewall buffing apparatus 100 for buffing a sidewall of a tyre, as per an implementation of the present subject matter. The tyre sidewall buffing apparatus 100 may be a part of the tyre manufacturing assembly, and may be used in conjunction with other components (not shown in FIGS. 1-2) for implementing various processes involved with manufacturing tyres.
[0027] The tyre sidewall buffing apparatus 100 may include a bottom
half rim 102 and a top half rim 104. The top half rim 104 may be pressed against the bottom half rim 102 to form a buffing cavity 106. The buffing cavity 106 thus formed may be such that it may have a longitudinally extending axis 108 and may be able to accommodate a tyre. The tyre sidewall buffing apparatus 100 may further include a rotating means 110 capable of rotating the accommodated tyre semi-annularly about the

longitudinally extending axis 108 of the buffing cavity 106. In one example, the tyre sidewall buffing apparatus 100 may be powered pneumatically, i.e., using compressed air mechanism. In such cases, the top half rim 104 may be pressed against the bottom half rim 102 using pneumatic mechanism. It may be noted that above example is only illustrative, and other mechanisms may also be used to perform various operations of the tyre sidewall buffing apparatus 100 without deviating from the scope of the present subject matter. The use of pneumatic mechanism for implementing various operations of the tyre sidewall buffing apparatus 100 may result in reduction in the manufacturing cost of the tyre, saving of consumable fluids, such as oils, etc.
[0028] As per an implementation of the present subject matter, a tyre
112 may be positioned and secured in the buffing cavity 106 with its sidewall facing upwards. In one example, the tyre sidewall buffing apparatus 100 may be capable of accommodating tyres of various sizes in the buffing cavity 106. In another example, the rotating means 110 may be a tyre rotation motor assembly. In yet another example, the rotating means 110 may cause the tyre 112 to rotate about 180° in a clockwise direction and about 180° in an anti-clockwise direction about the longitudinally extending axis 108 of the buffing cavity 106. However, any other means may also be used to rotate the tyre 112 semi-annularly about the longitudinally extending axis 108 of the buffing cavity 106 in any other manner without deviating from the scope of the present subject matter.
[0029] Continuing further, the tyre sidewall buffing apparatus 100 may
further include a first buffing wheel 114 positioned along the upward facing sidewall of the tyre 112 and inclined with the longitudinally extending axis 108 of the buffing cavity 106. The first buffing wheel 114 may be used to perform a coarse buffing on the upward facing sidewall of the tyre 112, and may be used to buff the areas on the sidewall of the tyre 112 which may not require much detailing. In one example, the first buffing wheel 114 may have a rough surface and a larger radius. In another example, the first buffing

wheel 114 may be of a material comprising tungsten carbide.
[0030] The tyre sidewall buffing apparatus 100 may furthermore include
a second buffing wheel 116 diametrically opposite to the first buffing wheel 114. The second buffing wheel 116 may also be positioned along the upward facing sidewall of the tyre 112 and inclined with the longitudinally extending axis 108 of the buffing cavity 106. The second buffing wheel 116 may be used to perform a fine buffing on the sidewall of the tyre 112. The second buffing wheel 116 may be used to buff the complex areas of the sidewall of the tyre 112, and to smoothen the edges of the portions which may already have been buffed by the first buffing wheel 114.
[0031] In one example, the second buffing wheel 116 may have a
smooth surface and a smaller radius. In another example, the second buffing wheel 116 may also be of a material comprising tungsten carbide. The use of tungsten carbide for the first buffing wheel 114 and the second buffing wheel 116 may emit minimal dust while the buffing wheels are in operation and in contact with the tyre 112, thereby increasing the life of the buffing wheels. However, it may be noted that the aforementioned example of the materials of the first buffing wheel 114 and the second buffing wheel 116 are only exemplary, and should not be construed to limit the scope of the present subject matter in any manner. The first buffing wheel 114 and the second buffing wheel 116 may be of any other material without deviating from the scope of the present subject matter.
[0032] The tyre 112, during manufacturing, may be imprinted with a set
of visual representations along the sidewall of the tyre 112. The visual representation may be imprinted on the sidewall of the tyre 112 in the form of an embossed white rubber. Examples of such visual representation may include, but are not limited to, alphanumeric characters, special characters, symbols, and logos. Thereafter, the tyre 112 with the imprinted visual representation in the form of white rubber may then be subjected to other subsequent steps of the tyre manufacturing process. The embossed white rubber of the visual representation, during the subsequent steps, may tend

to get spoiled or distorted, and may be required to be buffed. The manner in which the tyre sidewall buffing apparatus 100 efficiently buffs the sidewall of the tyre 112 is described in detail in conjunction with FIG. 3.
[0033] FIG. 3 illustrates a magnified view of the tyre sidewall buffing
apparatus 100, in operation, as per an implementation of the present subject matter. The various components and functionalities of FIG. 3 are explained in conjunction with the components described previously in conjunction with FIGS. 1-2.
[0034] In operation, the tyre 112 may be positioned in the buffing cavity
106 with the sidewall of the tyre 112 facing upwards. The top half rim 104 may be pressed against the bottom half rim 102 to secure the tyre 112. In one example, the tyre sidewall buffing apparatus 100 may be powered pneumatically, i.e., using compressed air mechanism. In such cases, the top half rim 104 may be pressed against the bottom half rim 102 using pneumatic mechanism. It may be noted that above example is only illustrative, and other mechanisms may also be used to perform various operations of the tyre sidewall buffing apparatus 100 without deviating from the scope of the present subject matter. The use of pneumatic mechanism for implementing various operations of the tyre sidewall buffing apparatus 100 may result in reduction in the manufacturing cost of the tyre, saving of consumable fluids, such as oils, etc.
[0035] A controller (not shown in FIGS. 1-3) may be communicatively
coupled to the tyre sidewall buffing apparatus 100. The controller may be any hardware-based or software-based computing device capable of receiving inputs from a user, processing them, and providing further inputs to the tyre sidewall buffing apparatus 100. Continuing further, the user of the tyre sidewall buffing apparatus 100 may provide a buffing input to the controller. The buffing input may be based on a sidewall profile of the tyre 112 and a plurality of buffing locations on the sidewall of the tyre 112. As would be understood, the sidewall profile of the tyre 112 may correspond to the dimensions of the tyre 112 to be buffed. For example, the user may

provide various parameters of the tyre 112 such as radius, vehicle compatibility, size, etc. to the controller. Such parameters may determine the sidewall profile of the tyre 112.
[0036] Further, the plurality of buffing locations may refer to the locations
on the sidewall of the tyre 112 where the visual representation in the form of embossed white rubber may be present. For example, for different tyres 112, the visual representation may be of different style and size. As a result, according to the size of the tyre 112, the visual representation may be imprinted on the sidewall in a different manner. As a further result, different tyres 112 may have the visual representation present on the tyre 112 at different locations along the sidewall of the tyre 112.
[0037] In one example, the dimensions of the tyre 112 and the plurality of
buffing locations may be manually provided by the user to the tyre sidewall
buffing apparatus 100 through the controller. In another example, a set of
sensors may be installed within the buffing cavity 106 of the tyre sidewall
buffing apparatus 100. The set of sensors may monitor the tyre 112 and the
corresponding sidewall, and may cause the controller to determine the
buffing input. However, it may be noted that any other technique known to a
person skilled in the art may also be used to determine the buffing input.
[0038] Continuing further with the present example, based on the buffing
input, the controller may determine an angle of inclination of the first buffing wheel 114 and the second buffing wheel 116. The angle of inclination of the first buffing wheel 114 and the second buffing wheel 116, based on the buffing input, may correspond to the presence of visual representation along the curvature of the sidewall of the tyre 112. For example, it may be the case that the white rubber of the visual representation may be extending to a certain height on the sidewall of the tyre 112, and may be buffed properly while each of the buffing wheels are inclined with the sidewall of the tyre 112 while being in contact with the tyre 112.
[0039] Continuing further, based on the determined angle of inclination,
the controller may then cause the first buffing wheel 114 and the second

buffing wheel 116 to incline with the longitudinally extending axis 108 of the buffing cavity 106. In one example, the tyre sidewall buffing apparatus 100 may include an inclination system mechanically coupled to the first buffing wheel 114 and the second buffing wheel 116. In such cases, based on the determined angle of inclination, the controller may cause the inclination system to incline the first buffing wheel 114 and the second buffing wheel 116 with the longitudinally extending axis 108 of the buffing cavity 106. However, it may be noted that any other technique known to a person skilled in the art may also be used to incline the first buffing wheel 114 and the second buffing wheel 116 with the longitudinally extending axis 108 of the buffing cavity 106 without deviating from the scope of the present subject matter.
[0040] Upon determining the angle of inclination of the first buffing wheel
114 and the second buffing wheel 116, the controller may then cause the rotating means 110 to semi-annularly rotate the tyre 112 about the longitudinally extending axis 108 of the buffing cavity 106. The semi-annular rotation of the tyre 112 about the longitudinally extending axis 108 of the buffing cavity 106 may be such, that the inclined first buffing wheel 114 and the inclined second buffing wheel 116 may come in contact with the plurality of buffing locations on the sidewall of the tyre 112. During semi-annular rotation, the first buffing wheel 114 may buff those locations on the tyre 112 which may not require much detailing, and the second buffing wheel 116 may then smoothen the edges and finalize the buffing process, thereby enabling better rendering of visual representation on the sidewall of the tyre 112.
[0041] Further, the inclination of the first buffing wheel 114 and the
second buffing wheel 116 may provide a plurality of planes at different angles with the longitudinally extending axis 108 of the tyre 112 through which the buffing may be performed. The different planes for buffing the sidewall of the tyre 112 may, in turn, properly ensure the buffing of the sidewall of the tyre 112 along all the curved surfaces of the tyre 112

efficiently, thereby making the white rubber of the imprinted visual representation to appear prominently. The manner in which the inclined first buffing wheel 114 and the inclined second buffing wheel 116 buff the sidewall of the tyre 112 is further described in more details in conjunction with FIG. 4.
[0042] FIG. 4 illustrates a front view of an exemplary tyre 400 with a first
buffing wheel 402-1 and a second buffing wheel 402-2, as per an implementation of the present subject matter. In one example, the tyre 400 may be implemented as the tyre 112 as described in conjunction with FIGS. 1-3. In another example, the first buffing wheel 302-1 may be implemented as the first buffing wheel 114 and the second buffing wheel 402-2 may be implemented as the second buffing wheel 116 as described in conjunction with FIGS. 1-3.
[0043] As described previously, the tyre 400, with a longitudinally
extending axis 404, during one of the processes of the tyre manufacturing
processes, may be imprinted with visual representation on the sidewall.
Such visual representation may be printed in the form of an embossed white
rubber 406 on the sidewall of the tyre 400. In one example, such embossed
visual representation may correspond to the brand name of the
manufacturer of the tyre 400. In another example, such visual representation
may correspond to a unique identification number provided by the
manufacturers on the tyre 400. In yet another example, such visual
representation may correspond to a set of alphanumeric characters
depicting compatibility of the corresponding tyre 400 with a set of vehicles. In
yet another example, such visual representation may correspond to
numerals pertaining to certain industry usage parameters such as maximum
sustainable speed of the tyre 400, maximum load capacity, etc. However,
any other type of special characters, logos, or symbols may also be
imprinted on the sidewall of the tyre 400 in the form of the embossed white
rubber 406 without deviating from the scope of the present subject matter.
[0044] Thereafter, the tyre 400 with the embossed white rubber 406 may

then be subjected to other subsequent steps of the tyre manufacturing process. The embossed white rubber 406 of the visual representation, during the subsequent steps, may tend to get spoiled or distorted, and may be required to be buffed.
[0045] In operation, as described previously, a user of the tyre sidewall buffing apparatus may provide a buffing input to the controller. The buffing input may be based on a sidewall profile of the tyre 400 and a plurality of buffing locations on the upward facing sidewall of the tyre 400. As described previously, the sidewall profile of the tyre 400 may correspond to the dimensions of the tyre 400 to be buffed. Further, the plurality of buffing locations may refer to the locations on the sidewall of the tyre 400 where the visual representation in the form of embossed white rubber may be present, depicted as 406 in FIG. 4.
[0046] Thereafter, based on the buffing input, the controller may determine an angle of inclination of the first buffing wheel 402-1 and the second buffing wheel 402-2. Based on the determined angle of inclination, the controller may then cause the first buffing wheel 402-1 and the second buffing wheel 402-2 to incline with the longitudinally extending axis 404 of the tyre 400. As depicted in FIG. 4, the first buffing wheel 402-1 may have its corresponding axis 408, and may be inclined with the longitudinally extending axis 404 of the tyre 400 with an angle of inclination, depicted as ‘α’ in FIG. 4. On the other hand, the second buffing wheel 402-2 may also have its corresponding axis 410 and may be inclined with the longitudinally extending axis 404 of the tyre 400 with an angle of inclination, depicted as ‘β’ in FIG. 4. It may bee noted that the angles of inclination of the first buffing wheel 402-1 and the second buffing wheel 402-2 are only illustrative, and should not be construed to limit the scope of the present subject matter in any manner. The controller, based on the buffing input, may cause the first buffing wheel 402-1 and the second buffing wheel 402-2 to incline at any angle without deviating from the scope of the present subject matter. During semi-annular rotation of the tyre 400, the first buffing wheel 402-1 and the

second buffing wheel 402-2 may come in contact with the plurality of buffing
locations on the sidewall of the tyre 400, depicted as location 406 in FIG. 4.
[0047] Although examples for the present disclosure have been
described in language specific to structural features and/or methods, it should be understood that the appended claims are not necessarily limited to the specific features or methods described. Rather, the specific features and methods are disclosed and explained as examples of the present disclosure.

I/We Claim:
1. A tyre sidewall buffing apparatus (100) comprising:
a bottom half rim (102);
a top half rim (104), wherein the top half rim (104) is to be pressed against the bottom half rim (102) to form a buffing cavity (106) with a longitudinally extending axis (108);
rotating means (110) to rotate a tyre (112) semi-annularly about the longitudinally extending axis (108) of the buffing cavity (106);
a first buffing wheel (114) positioned along an upward facing sidewall of the tyre (112) and inclined with the longitudinally extending axis (108) of the buffing cavity (106), wherein the first buffing wheel (114) is to perform a coarse buffing on the sidewall of the tyre (112); and
a second buffing wheel (116) diametrically opposite to the first buffing wheel (114), wherein the second buffing wheel (116) is positioned along the upward facing sidewall of the tyre (112) and inclined with the longitudinally extending axis (108) of the buffing cavity (106), and wherein the second buffing wheel (116) is to perform a fine buffing on the sidewall of the tyre (112).
2. The tyre sidewall buffing apparatus (100) as claimed in claim 1,
further comprising a controller, wherein the controller, based on a buffing
input, is to:
determine an angle of inclination of the first buffing wheel (114) and the second buffing wheel (116); and
cause the rotating means (110) to rotate the tyre (112) semi-annularly about the longitudinally extending axis (108) of the buffing cavity (106).
3. The tyre sidewall buffing apparatus (100) as claimed in claim 2,
wherein the buffing input is based on:

a sidewall profile of the tyre (112); and
a plurality of buffing locations on the sidewall of the tyre (112), wherein the first buffing wheel (114) and the second buffing wheel (116), in operation, are to come in contact with the upward facing sidewall of the tyre (112) on the plurality of buffing locations.
4. The tyre sidewall buffing apparatus (100) as claimed in claim 3, wherein the sidewall profile of the tyre (112) corresponds to dimensions of the tyre (112).
5. The tyre sidewall buffing apparatus (100) as claimed in claim 3, wherein the plurality of buffing locations on the sidewall of the tyre (112) corresponds to a presence of a visual representation on the sidewall of the tyre (112).
6. The tyre sidewall buffing apparatus (100) as claimed in claim 2, wherein the controller, based on the determined angle of inclination, is to cause the first buffing wheel (114) and the second buffing wheel (116) to incline with the longitudinally extending axis (108) of the buffing cavity (106).
7. The tyre sidewall buffing apparatus (100) as claimed in claim 1, wherein the rotating means (110) is a tyre rotation motor assembly.
8. The tyre sidewall buffing apparatus (100) as claimed in claim 1, wherein the tyre (112), during semi-annular rotation, is to rotate about 180° in a clockwise direction and about 180° in an anti-clockwise direction about the longitudinally extending axis (108) of the buffing cavity (106).

9. The tyre sidewall buffing apparatus (100) as claimed in claim 1,
wherein the first buffing wheel (114) and the second buffing wheel (116)
are of a material comprising tungsten carbide.
10. The tyre sidewall buffing apparatus as claimed in claim 1, wherein;
the first buffing wheel (114) has a rough surface and a larger
radius; and
the second buffing wheel (116) has a smooth surface and a smaller radius.