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: ASSEMBLING TUBE ACCESSORIES ON VALVE STEMS OF
TIRE TUBES
2. Applicant(s)
NAME NATIONALITY ADDRESS
CEAT LIMITED Indian CEAT Ltd At: Get Muwala Po: Chandrapura Ta: Halol - 389 350 Dist: Panchmahal, Gujarat, 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.

TECHNICAL FIELD
[0001] The present subject matter relates, in general, to assembling of parts,
particularly but not exclusively, to the assembling of accessories on a valve stem of a tire tube.
BACKGROUND
[0002] Assembly refers to a process of assembling parts according to specified
technical requirements to form a qualified product. A product may be composed of a plurality of parts and components, and the process of combining the parts into the components or combining the parts and the components into the product according to the specified technical requirements is called assembly. The assembly generally comprises the operations of assembly, adjustment, inspection, test, coating, packaging and the like.
[0003] For instance, valve assembly, which, in general is considered the last
stage in the tire manufacturing process, is the process of combining all parts and components of the valve together to make it a product according to the specified technical requirements. The traditional process of assembling the parts of the valve assembly means combining all parts and components of the valve together by fitting each component on the valve of a tire tube and is generally completed manually by workers.
BRIEF DESCRIPTION OF DRAWINGS
[0004] The detailed description is described with reference to the
accompanying figures. In the figures, the left-most digit(s) of a reference number
identifies the figure in which the reference number first appears. The same numbers
are used throughout the drawings to reference features and components.
[0005] Fig. 1 illustrates a perspective view of a system for assembling tube
accessories on a valve stem of a tire tube, in accordance with an embodiment of
the present subject matter.
[0006] Fig. 2 illustrates top view and front view of the bowl feeders of the
system for assembling tube accessories on a valve stem of a tire tube, in accordance
with an implementation of the present subject matter.

[0007] Fig. 3 illustrates a rotating unit of the system for assembling tube
accessories on a valve stem of a tire tube, in an implementation of the present
subject matter.
[0008] Fig. 4 illustrates a schematic view of the system depicting a top view of
a bowl feeder assembly and a side view of a rotating unit for rotating tube
accessories on the valve stem of the tire tube, in accordance with an
implementation of the present subject matter.
[0009] Fig. 5 illustrates a method for assembling tube accessories on a valve
stem of a tube, in accordance with an implementation of the present subject matter.
DETAILED DESCRIPTION
[0010] The present subject matter relates to aspects relating to assembling tube
accessories on a valve stem of a tube.
[0011] In a tire, the function of a valve is to inflate and deflate the tire and to
maintain a seal after the tire is inflated. The common valve is composed of three main components or parts, namely, a nut, a washer, and a cap. The components (also known as tire tube accessories) are generally manually assembled on the valve stem of a tube valve and require huge manpower for doing so and is thus a time-consuming and tedious process. In addition, there are high chances of loose-fitting of the tube accessories or missing tube accessories that result in dissatisfaction at a customer’s end.
[0012] Further, assembling the tire tube accessories on the valve stem involves
the use of handling of fragile parts, especially those of a delicate nature, such as
tiny nuts, washers, screws, caps, etc. In a conventional scenario, the handling of
tiny parts that need to be assembled on the valve stem requires manual intervention
to properly handle and assemble them on the tube valve for further inspection. This
manual intervention entails considerable effort and expense and still can introduce
some inaccuracies and inconsistencies, which are inherent in manual operations.
[0013] For example, in manual handling and assembling of tire tube
accessories, it is difficult to hold the tire tube accessories tightly by hand since the tire tube accessories are tiny parts which pose a risk of the tire tube accessories being slipped or lost in the process of being assembled or rotated on the tube valve.

Further, some tire tube accessories need to be suitably rotated against the valve stem body of the tube valve with a certain degree of precision that does not lead to over-tightening or loosening of the tire tube accessories on the valve stem of the tube valve resulting in improper assembling and thus hampering the production efficiency of tire tubes. Thus, manual assembling of tire tube accessories and some known automatic assembly equipment for assembling tire tube accessories are not efficient as they do not provide accuracy in terms of proper fitting of the tire tube accessories in a systematic manner with precision. Also, the conventional systems do not provide a mechanism that ensures the proper assembling of tire tube accessories on a valve stem with precision and accuracy and without human intervention.
[0014] Accordingly, to solve the above-mentioned problems of the
conventional equipment for assembling tire tube accessories, in accordance with an embodiment of the present subject matter, a system for assembling tube accessories on a valve stem of a tube is provided. The system comprises a first bowl feeder assembly that includes a first bowl feeder to contain a first tube accessory to be assembled on the valve stem. The first bowl feeder is coupled to a first conveyor channel, wherein the first conveyor channel is to place the first tube accessory on the valve stem. The system further includes a second bowl feeder assembly comprising a second bowl feeder to contain a second tube accessory to be assembled on the valve stem. The second bowl feeder is coupled to a second conveyor channel, wherein the second conveyor channel is to place the second tube accessory on the valve stem. Furthermore, the system also includes a third bowl feeder assembly including a third bowl feeder to contain a third accessory for assembling on the valve stem. The third bowl feeder is coupled to a third conveyor channel, and wherein third conveyor channel is to place the third tube accessory the third tube accessory on the valve stem.
[0015] As will be understood, the system of the present invention that
comprises first bowl feeder assembly, second bowl feeder assembly, and third bowl feeder assembly for systematically delivering and placing the tire tube accessories on the valve stem of a tire tube eliminates the problem associated with manual

handling and assembling of tire tube accessories, i.e., loose or improper fitting of
tube accessories and risk of tube accessories being lost in the process of
assembling. The system described above also reduces the overall time of the
operation of assembling tube accessories on the valve stem of a tire tube thereby
increasing the production efficiency in the tire tube manufacturing industry.
[0016] In accordance with an embodiment of the present subject matter, a
method for assembling tube accessories on a valve stem of a tube is illustrated. The method comprises receiving, a first tube accessory to be assembled on the valve stem from a first bowl feeder that holds a set of first tube accessories. The first tube accessory is assembled on the valve stem by delivering the first tube accessory on the valve stem by a first conveyor channel that is coupled to the first bowl feeder. The method similarly includes receiving, from a second bowl feeder holding a set of second tube accessories, a second tube accessory to be assembled on the valve stem. The second tube accessory is assembled on the valve stem by delivering the second tube accessory on the valve stem by a second conveyor channel coupled to the second bowl feeder. Also, the method comprises receiving from a third bowl feeder holding a set of third tube accessories, a third tube accessory to be assembled on a valve stem. The third tube accessory is assembled on the valve stem by delivering the third tube accessory on the valve stem by a third conveyor channel coupled to the third bowl feeder.
[0017] The system and method of the present invention for assembling tube
accessories on a valve stem of a tube valve of a tire in a disciplined manner that systematically delivers the tire tube accessories to an assembly point (where these tire tube accessories are securely fastened to the valve stem of a tire tube) with accuracy and precision in fastening such that the tire tube accessories do not slip or are lost while being secured or rotated on the valve stem thereby increases the production efficiency in tire tube manufacturing industry.
[0018] The present invention provides several advantages, such as eliminating
the need of manual intervention for assembling the tire tube accessories on the valve stem and the risk of loosening or slipping of tire tube accessories due to manual handling of the same. The system also enables tire tube accessories being

delivered to the assembly point systematically in a disciplined manner and assembled on the valve stem with proper precision. The system employs a mechanism such that the tire tube accessories and the valve stem are tightly held together and rotated thereby reducing the risk of tire tube accessories being slipped or lost while being rotated or assembled on the valve stem. The present invention also provides a methodology that enables certain tube accessories to be only placed on the valve stem while certain other accessories to be rotated on the valve stem in an automatic manner so as to avoid manual rotation which is tedious to be performed manually and requires skilled personnel and so involves significant amount of time.
[0019] Thus, the system of the present invention not only incorporates a
mechanism to deliver the tire tube accessories one by one separately to the assembly point but also provides a mechanism that enables proper fitting and rotation of tube accessories in a systematic and disciplined manner with proper precision and accuracy. Accordingly, the present invention provides low-cost automation in the tire tube industry and eliminates the need of human intervention thereby reducing labour costs and improving production efficiency.
[0020] The above and other features, aspects, and advantages of the subject
matter will be better explained with regard to the following description and accompanying figures. It should be noted that the description and figures merely illustrate the principles of the present subject matter along with examples described herein and should not be construed as a limitation to the present subject matter. It is thus understood that various arrangements may be devised that, although not explicitly described or shown herein, embody the principles of the present disclosure. Moreover, all statements herein reciting principles, aspects, and examples thereof, are intended to encompass equivalents thereof. Further, for the sake of simplicity, and without limitation, the same numbers are used throughout the drawings to reference like features and components.
[0021] Figure 1 depicts a system 100 for assembling tube accessories on a
valve stem of a tire tube, in accordance with an implementation of the present subject matter. Figure 1 illustrates a system 100 comprising a first bowl feeder

assembly 110, a second bowl feeder assembly 120, and a third bowl feeder assembly 130. The first bowl feeder assembly 110 includes a first bowl feeder 110-1 to contain a first tube accessory to be assembled on the valve stem. The first bowl feeder 110-1 is coupled to a first conveyor channel 110-2, wherein the first conveyor channel 110-2 is to place the first tube accessory on the valve stem. The system 100 further comprises a second bowl feeder assembly 120 comprising a second bowl feeder 120-1 to contain a second tube accessory to be assembled on the valve stem. The second bowl feeder 120-1 is coupled to a second conveyor channel 120-2 (second conveyor channel is not shown in the figure) wherein the second conveyor channel 120-2 is to place the second tube accessory on the valve stem. The system 100 also includes a third bowl feeder assembly 130 comprising a third bowl feeder 130-1 to contain a third accessory for assembling on the valve stem. The third bowl feeder 130-1 is coupled to a third conveyor channel 130-2 (third conveyor channel is not shown in the figure), wherein the third conveyor channel 130-2 is to place the third tube accessory on the valve stem.
[0022] The first bowl feeder 110-1, the second bowl feeder 120-1, and the third
bowl feeder 130-1 may be similar to bowl feeder devices used to orient and feed individual parts for assembly on industrial production lines. The bowl feeders 110-1, 120-1, and 130-1 are used to handle a bulk of small components that is to be fed into another component or machine one by one, oriented in a particular direction. As will be understood, in the present invention, the bowl feeders 110-1, 120-1, and 130-1 are used to handle nuts, washers, and caps that are to be assembled on the valve stem of the tire tube.
[0023] In an example implementation of the present subject matter, a set of
first tube accessories contained in the first bowl feeder 110 may be a fastener, such as a nut. The nut is a type of mechanical fastener with a threaded hole. It is attached to a bolt, screw, or stud to provide a clamping force and prevent axial movement. The most common type of nut is the hex nut. This has a hexagonal outer shape for the faces of tools to apply torque when fastening.
[0024] In an example implementation of the present subject matter, a set of
second tube accessories contained in the second bowl feeder 120 may be a

fastening element such as a washer. A washer may be understood as a thin plate with a circular hole in the center and is used to distribute the load of a threaded fastener, such as a bolt or nut. Before a screw or bolt is driven into a surface, the washer may be placed in order to prevent looseness and provide protection. Flat washers used in the present invention may be any common type of washer with two flat sides or they may be circular that come in a variety of sizes and thicknesses. These flat washers are general purpose, used to distribute force, protect the valve stem to which it is attached, and correct the size of an opening.
[0025] In an example implementation of the present subject matter, a set of
third tube accessories contained in the third bowl feeder 130-1 may be a valve stem cap, often called dust caps or tire pressure caps, which are tiny plastic caps that are screwed onto the valve stem. The tire valve stem cap is a critical component of the tire because it helps maintain tire pressure.
[0026] In an example, the present invention enables the fastening elements
such as nuts, washers, and caps to be delivered from the bowl feeders 110-1, 120-1, and 130-1 via conveyor channels 110-2, 120-2, and 130-2 to the assembly point on the assembling table 150 where the nut, , and cap are assembled on the valve stem in a systematic manner via rotating units 160, 180 and the washer is assembled on the valve stem by means of a positioning unit 170.
[0027] The bowl feeders 110-1, 120-1, and 130-1 provide a mechanism for
supplying the components, namely, the nuts, washers, and caps for rapid use for assembly on the valve stem. In an example, the bowl feeders 110-1, 120-1, and 130-1 use mechanical vibrations and centrifugal force to move parts along a conveying track. The bowl feeders 110-1, 120-1, and 130-1 consist of a specially shaped bowl with ramps and other features designed for the parts being fed. In an example, the bowl feeders 110-1, 120-1, and 130-1 when configured for a vibratory feed includes a cylindrical wall portion, a number of internal tracks, and a bottom portion. The wall portion is usually constructed by cutting or stamping a piece of sheet metal to shape, marking the pitch of the tracks on the wall, and then forming the wall into a cylinder. The constructions of bowl feeders are not elaborated herein for the sake of brevity. Further, as shown in Figure 1, the first, second, and third

bowl feeders 110-1, 120-1, and 130-1 are coupled to their respective conveyor channels 110-2, 120-2, and 130-2 (120-2 and 130-2 are not shown in the figure) for placing the tube accessories on the valve stem. As will be understood, the conveyor channels 110-2, 120-2, and 130-2, alike any conveyor channel which serves as a standard piece of mechanical handling equipment to move goods, products, raw goods, and other materials from one location to another, enables moving the respective components from the respective bowl feeders 110-1, 120-1 and 130-1 to location where the components are assembled on the valve stem. The conveyor channels can be tailored or configured to handle the respective components, i.e., first tube accessory, second tube accessory, and third tube accessory or nuts, washers, or caps, respectively. In an example embodiment, the first conveyor channel, second conveyor channel, and third conveyor channels 110-2, 120-2, and 130-2 have a width in accordance with the first tube accessory, second tube accessory, and third tube accessory, respectively, such that the respective conveyor channel 110-2, 120-2 or 130-2 carries only one tube accessory at a time.
[0028] In the present invention, the bowl feeders 110-1, 120-1, 130-1 and
conveyor channels 110-2, 120-2, 130-2 form an integrated assembly, wherein the bowl feeders 110-1, 120-1, 130-1 hold the tube accessories, and the conveyor channels 110-2, 120-2, 130-2 carry out the transportation of the tube accessories from the bowl feeders 110-1, 120-1, 130-1 to the assembly point where the tube accessories are to be assembled on the valve stem.
[0029] In accordance with an embodiment of the present invention, the tube
accessories to be assembled on the valve stem are transported from the bowl feeders 110-1, 120-1, 130-1 to an assembly point via the conveyor channels 110-2, 120-2, 130-2 respectively. The assembly point may be understood as a position (or area) where the tube accessories, i.e., the nuts, washers, and caps that are extracted from their bowl feeders 110-1, 120-1, 130-1 one after another are assembled in proper order on the valve stem at the assembly point. This, conventionally, requires a multiplicity of physical movements which are relatively time-consuming, and which must be repeated for every fastening assembly (or tube

accessories) in the product and is subject to error in the order and orientation of the fastening elements when done manually, as explained earlier. To this end, the bowl feeder assemblies, 110, 120, and 130 of system 100 facilitates the automatic delivery of the tube accessories to the assembly point where the tube accessories are assembled on the valve stem without manual intervention.
[0030] In one implementation of the present subject matter, the assembling
point or the setup where the conveyor channels 110-2, 120-2, and 130-2 deliver the tube accessories for assembling on the valve stem is an assembly table (or platform) 150 as shown in Figure 1. The assembly table 150 may be any work surface that is used for the assembly of parts or components into larger assemblies or products. The assembly table 150 may be similar to any workstation or assembly station typically found in a factory or workshop setting and is used to hold and organize the parts and tools needed for assembly. In an example, the assembly table 150 may be a specialized work surface that is designed specifically for the purpose of assembling tube accessories on the valve stem.
[0031] As already illustrated, each conveyor channel that is arranged to deliver
the tube accessories on the valve stem has two ends, i.e., a first end and a second end. The first end of the conveyor channels 110-2, 120-2, and 130-2 are coupled to their respective bowl feeders (110-1, 120-1, 130-1), and the second end of the conveyor channel 110-2, 120-2 and 130-2 are coupled to their respective rotating units. For instance, a first end 110-2’of the first conveyor channel 110-2 is coupled to the first bowl feeder 110-1, and a second end 110-2’’of the first conveyor channel 110-2 is coupled to first rotating unit 160, wherein the first rotating unit 160 is to rotate the first tube accessory on the valve stem. Similarly, the first end (not shown in the Figure) of the second conveyor channel 120-2 is coupled to the second bowl feeder 120-1 and the second end of the second conveyor channel 120-2 is connected to a positioning unit 170, wherein the positioning unit 170 is to hold the second tube accessory on the valve stem. Also, the first end of the third conveyor channel 130-2 is coupled to the third bowl feeder 130-1 and the second end of the third conveyor channel 130-2 is coupled to a second rotating unit 180. In an example implementation, the second end of the third conveyor channel 130-

2 has a die for holding the third tube accessory. The die is coupled to a second
rotating unit 180 to rotate the third tube accessory on the valve stem. The die
enables the cap to be easily fitted into and moveable onto the valve stem.
[0032] Figure 2 illustrates a top view and front of the bowl feeder assemblies
110, 120, and 130 of the system 100 for assembling tube accessories on a valve stem of a tire tube, in accordance with an implementation of the present subject matter. As shown in Figure 2, the figure depicts a front view of the bowl feeder assemblies of the system 100 and the corresponding top view of these assemblies. From the top view, a circular rim of the bowl feeder is visible.
[0033] The bowl feeder assembly 110 shown in Figure 2 is coupled to the
rotating unit 160 (as shown in Figure 1) which performs rotation of nut on the valve
stem, after the nut is delivered from the first bowl feeder 110-1 to an assembly
point on the assembly table 150 where the nut is to be assembled on the valve stem.
[0034] Similarly, the bowl feeder assembly 120 shown in Figure 2 is coupled
to the positioning unit 170 (shown in Figure 1) to hold or grip the washer on the valve stem after the washer is delivered from the second bowl feeder 120-1 to an assembly point on the assembly table 150 where the second tube accessory (for example, the washer) is to be assembled on the valve stem. It is to be understood that the positioning unit 170 (shown in Figure 1) enables to place and hold the washer on the valve stem as the washer only requires insertion into the valve stem and does not require rotation.
[0035] Further, the second rotating unit 180 (shown in Figure 1) performs
rotation of the cap on the valve stem, once the cap is delivered from the third bowl feeder 130 to an assembly point on the assembly table 150 where the third tube accessory (for example, the cap) is to be assembled on the valve stem. The cap is delivered via a second end of the third conveyor channel 130-2, wherein the second end of the third conveyor channel 130-2 has a die for holding the cap. The die is further coupled to a second rotating unit 180 to rotate the cap on the valve stem. thus, the second rotating unit 180 (shown in Figure 1) is adapted to rotate the cap so as to assemble it on the valve stem.

[0036] System 100 (shown in Figure 1) of the present invention thus enables
the first rotating unit 160, the positioning unit 170 and the second rotating unit 180 to perform the placement along with rotation (required on the type of tire tube accessory) of nut, washers and cap in an appropriate order and in a systematic manner such that the nut, washer, and cap are assembled on the valve stem with proper precision. Thus, the system enables certain tube accessories (e.g., washer) to be only placed on the valve stem while certain other accessories (e.g., nut and cap) to be rotated on the valve stem in an automatic manner which is otherwise difficult to be performed with precision when done manually.
[0037] In accordance with an implementation of the present subject matter,
Figure 3 illustrates a rotating unit of the system 100 for assembling tube accessories on a valve stem of a tire tube wherein at least one conveyor channel 303 is coupled to a rotating unit to enable the delivery of nut or cap to enable insertion and rotation of the nut or cap for assembling on the valve stem.
[0038] As embodied in the example shown in Figure 3, the conveyor channel
303 is seen as carrying the tube accessories in a disciplined manner. The conveyor channel 303 may be the same as the first conveyor channel 110-2, second conveyor channel 120-2, and third conveyor channel 130-2 as illustrated with reference to Figure 1. The first conveyor channel, second conveyor channel, and third conveyor channel have a width that is in accordance with the first tube accessory, second tube accessory, and third tube accessory, respectively, such that the respective conveyor channel carries only one tube accessory at a time. As can be clearly seen from Figure 3, the first conveyor channel 110-2 comprises at least one stopper 301, 302 that is configured to block more than one tube accessory in the respective conveyor channel at a time. The stopper may be in the form of a plug or a screw. Thus, the stopper adapted in the conveyor channel 303, provide a mechanism that delivers the tire tube accessories (e.g., nut, washer, and cap) one by one separately to the assembly point. Also, the second conveyor channel 120-2 and third conveyor channel 130-2 have a similar symmetry as the first conveyor channel as explained above, wherein stoppers 301, 302 are configured to block more than one tube accessory in their respective conveyor channels at a time and thus the structure of

stoppers 301, 302 with respect to the second conveyor channel 120-2 and the third
conveyor channel 130-2 is not described herein for the sake of brevity.
[0039] Once the tire tube accessories (e.g., nut and cap) are delivered to the
assembly point via the conveyor channels, a rotating unit 304 is to rotate the nut and cap for assembling on the valve stem For example, the first rotating unit 160 and the second rotating unit 180 (shown in Figure 1) enable the nut and cap to be rotated on the valve stem for further assembling on the valve stem in an automatic manner with precision and accuracy and without any manual intervention. For instance, as shown in Figure 3, 304 is the rotating unit comprising an arm and a motor, wherein the motor is attached to a box spanner to rotate the nut for assembling on the valve stem. The rotating units as discussed above are coupled to their respective conveyor channels and enable the nut and cap to be rotated with accuracy such that the nut and cap do not slip during rotation.
[0040] Figure 4 illustrates a schematic view of the system 100 depicting top
view of at least one bowl feeder assembly 110, 120, or 130 and a side view of a rotating unit of the system 100 that is enabled for rotating tube accessories on the valve stem of the tire tube as mentioned with reference to Figures 3 above. The system 100 shows a conveyor channel 401 that comprises two ends wherein a first end of the conveyor channel 401 is coupled to a bowl feeder and a second end of the conveyor channel 401 is coupled to an arm 402 of a rotating unit, the arm 402 is configured to receive the tube accessories (like nut, washer, and cap) one by one from the second end of the conveyor channel 401. One or more stoppers 301, 302 shown in Figure 4 are configured to block more than one tube accessory in the respective conveyor channel 401 at a time. The arm 402 is rotated by a motor 403 for rotating the tube accessory on the valve stem. Thus, as shown in Figure 4, the motor 403 for rotating the arm of the rotating unit is attached to a die (wherein the die is to hold the cap), wherein the motor 403 enables rotating the cap for assembling on the valve stem. In an example, the first end 110-2’ of the first conveyor channel 110-2 is coupled to the first bowl feeder 110-1, and a second end 110-2’’ of the first conveyor channel 110-2 is coupled to a first rotating unit 160. The first rotating unit comprises a first motor and a first arm, wherein the first arm

is configured to receive the first tube accessory from the second end of the first conveyor channel. The first arm is rotated by the first motor for rotating the first tube accessory on the valve stem.
[0041] In an example, the second conveyor channel 120-2 comprises two ends,
wherein a first end of the second conveyor channel 120-2 is coupled to the second
bowl feeder 120-1, and a second end of the second conveyor channel 120-2 is
coupled to a positioning unit 170, wherein the positioning unit 170 is to hold the
second tube accessory on the valve stem. Thus, the second conveyor channel 120-
2 is not coupled to any rotating unit as the second accessory only needs to be
inserted or placed on the valve stem and does not require any rotation to be
performed. For instance, the washer only needs to be inserted or placed on the
valve stem rather than being rotated while assembling on the valve stem.
[0042] In an example, as shown in Figure 4, the third conveyor channel 130-2
comprises two ends, a first end of the third conveyor channel is coupled to the third bowl feeder 130-1 and a second end of the third conveyor channel 130-2 has a die for holding the third tube accessory. The die is coupled to a second rotating unit 180 to rotate the third tube accessory on the valve stem. The second rotating unit 180 comprises a second motor and a second arm, wherein the second arm is configured to receive the third tube accessory from the second end of the third conveyor channel. The second arm is rotated by the second motor for rotating the third tube accessory on the valve stem.
[0043] Consequently, as shown in Figure 4, the rotating unit may be a first
rotating unit 160 and a second rotating unit 180 that is coupled to the second end of the first and third conveyor channels 110-1 and 130-1 respectively for facilitating the rotation of tube accessories on the valve stem of the tire tube. It is to be understood that the positioning unit 170 for holding the second tube accessory and the first and second rotating units 160 and 180 for rotating the first and third tube accessories on the valve stem have a structure that allows the tube accessories to be held tightly such that they do not slip or loosen during rotation.
[0044] As mentioned above, the system 100 provides an arrangement where
the tube accessories, such as the nut, washer, and cap, are arranged in a disciplined

manner. The system allows three bowl feeders 110-1, 120-1, and 130-1 for carrying each accessory, i.e., nut, washer, and cap, separately. As the nut and the cap are required to be rotated while being fitted on the valve stem, the system 100 also provides a holder and a die to hold the nut and cap, respectively, such that the nut and cap do not slip while being rotated on the valve stem. As already explained, the washer only requires insertion into the valve, hence rotation of the washer on the valve stem is not required. The tube accessories are moved to the assembly point from the bowl feeders via conveyor channels, where each accessory, i.e., nut, washer, and cap, is assembled on the valve stem one-by-one in a proper order without any manual intervention. Thus, the present invention automates the accessories assembly line thereby eliminating the problem of missing components and loose fitting of components as well as reducing the overall time of the operation.
[0045] In accordance with an embodiment of the present subject matter, a
method 500 for assembling tube accessories on a valve stem of a tube is described,
in accordance with another implementation of the present subject matter.
[0046] The order in which method 500 is described is not intended to be
construed as a limitation, and any number of the described method blocks may be combined in any order to implement method 500, or an alternative method. Although the method 500 may be implemented in a variety of systems for assembling tube accessories on a valve stem of a tube, for the ease of explanation, the present description of the example method 500 is provided in reference to the systems 100, 200, 300, and 400 as illustrated in Fig. 1-3 and described previously in detail. Thus, it may be understood that blocks of the method 500 may be performed, for example, by the system 100, 200, 300, and 400, as already illustrated in FIG’s 1-3.
[0047] Referring to Figure 5, at block 501, the method 500 for assembling tube
accessories on a valve stem of a tube, in an implementation of the present subject matter, comprises receiving from a first bowl feeder 110-1 holding a set of first tube accessories, a first tube accessory to be assembled on the valve stem. The first tube accessory is assembled on the valve stem by delivering the first tube accessory

on the valve stem by a first conveyor channel 110-2 coupled to the first bowl feeder 110-1. At block 502, the first tube accessory is rotated on the valve stem by a first rotating unit 160 coupled to the first conveyor channel 110-2 on receiving the first tube accessory through the first conveyor channel 110-2. The first tube accessory is assembled on the valve stem upon being rotated by the first rotating unit 160 on the valve stem. At block 503, the method further includes receiving, from a second bowl feeder 120-1 holding a set of second tube accessories, a second tube accessory to be assembled on the valve stem. The second tube accessory is assembled on the valve stem by delivering the second tube accessory on the valve stem by a second conveyor channel 120-2 coupled to the second bowl feeder 120-1. At block 504, the method further includes placing the second tube accessory on the valve stem, on receiving the second tube accessory from the second conveyor channel 120-2. At block 505, the method comprises receiving a third bowl feeder 130-1 holding a set of third tube accessories, a third tube accessory to be assembled on a valve stem. The third tube accessory is assembled on the valve stem by delivering the third tube accessory on the valve stem by a third conveyor channel 130-2 coupled to the third bowl feeder 130-1.
[0048] At block 506, the method includes rotating the third tube accessory on
the valve stem by a second rotating unit 180 coupled to the third conveyor channel 130-2, on receiving the third tube accessory through the third conveyor channel 130-2. The third tube accessory is assembled on the valve stem upon being rotated by the second rotating unit 180 on the valve stem.
[0049] The present invention thus provides a methodology that ensures proper
fitting and rotation of tube accessories in a systematic and disciplined manner with proper precision and accuracy. The present invention provides numerous advantages in terms of low-cost automation in the tire tube industry and thus eliminating the need of human intervention thereby reducing the labor costs and improving production efficiency.
[0050] Although implementations for the systems and methods for assembling
tube accessories on a valve stem of a tube are described, it is to be understood that the present subject matter is not necessarily limited to the specific features of the

methods and systems described herein. Rather, the specific features are disclosed as implementations for the method and system for assembling tube accessories on a valve stem of a tube.

I/We Claim:
1. A system (100) for assembling tube accessories on a valve stem of a tube,
the system comprising:
a first bowl feeder assembly (110) comprising a first bowl feeder (110-1) to contain a first tube accessory to be assembled on the valve stem, wherein the first bowl feeder (110-1) is coupled to a first conveyor channel (110-2), and wherein the first conveyor channel (110-2) is to place the first tube accessory on the valve stem;
a second bowl feeder assembly (120) comprising a second bowl feeder (120-1) to contain a second tube accessory to be assembled on the valve stem, wherein the second bowl feeder (120-1) is coupled to a second conveyor channel (120-2), and wherein the second conveyor channel (120-2) is to place the second tube accessory on the valve stem; and
a third bowl feeder assembly (130) comprising a third bowl feeder (130-1) to contain a third accessory for assembling on the valve stem, wherein the third bowl feeder (130-1) is coupled to a third conveyor channel (130-2), and wherein the third conveyor channel (130-2) is to place the third tube accessory the third tube accessory on the valve stem.
2. The system (100) as claimed in claim 1, wherein the first conveyor channel (110-2) comprises two ends, a first end (110-2’) of the first conveyor channel (110-2) being coupled to the first bowl feeder (110-1) and a second end (110-2’’) of the first conveyor channel (110-2) being coupled to a first rotating unit (160), wherein the first rotating unit (160) is to rotate the first tube accessory on the valve stem.
3. The system (100) as claimed in claim 1, wherein the second conveyor channel (120-2) comprises two ends, a first end of the second conveyor channel (120-2) being coupled to the second bowl feeder (120-1) and a second end of the second conveyor channel (120-2) being coupled to a positioning unit (170),

wherein the positioning unit (170) is to hold the second tube accessory on the valve stem.
4. The system (100) as claimed in claim 1, wherein the third conveyor channel (130-2) comprises two ends, a first end of the third conveyor channel (130-2) being coupled to the third bowl feeder (130-1) and a second end of the third conveyor channel (130-2) having a die for holding the third tube accessory, and wherein the die is coupled to a second rotating unit (180) to rotate the third tube accessory on the valve stem.
5. The system (100) as claimed in claim 1, wherein a conveyor is to carry the tube to a location of the system for assembling tube accessories on the valve stem.
6. The system (100) as claimed in claim 2, wherein the first rotating unit (160) comprises a first motor and a first arm, the first arm being configured to receive the first tube accessory from the second end of the first conveyor channel (110-2), the first arm being rotated by the first motor for rotating the first tube accessory on the valve stem.
7. The system (100) as claimed in claim 4, wherein the second rotating unit (180) comprises a second motor and a second arm, the second arm being configured to receive the third tube accessory from the second end of the third conveyor channel (130-2), the second arm being rotated by the second motor for rotating the third tube accessory on the valve stem.
8. The system (100) as claimed in claim 1, wherein the first conveyor channel (110-2), second conveyor channel (120-2) and third conveyor channel (130-2) have a width in accordance with the first tube accessory, second tube accessory, and third tube accessory, respectively, such that the respective conveyor channel carries only one tube accessory at a time.

9. The system (100) as claimed in claim 8, wherein each of the first conveyor channel (110-2), second conveyor channel (120-2) and third conveyor channel (130-2) comprise at least one stopper (301, 302) configured to block more than one tube accessory in the respective conveyor channel at a time.
10. The system (100) as claimed in claim 1, wherein the tube accessories are at least one of a nut, washer and a cap.
11. A method (500) for assembling tube accessories on a valve stem of a tube, the method comprising:
receiving, from a first bowl feeder (110-1) holding a set of first tube accessories, a first tube accessory to be assembled on the valve stem, wherein the first tube accessory is assembled on the valve stem by delivering the first tube accessory on the valve stem by a first conveyor channel (110-2) coupled to the first bowl feeder (110-1);
receiving, from a second bowl feeder (120-1) holding a set of second tube accessories, a second tube accessory to be assembled on the valve stem; wherein the second tube accessory is assembled on the valve stem by delivering the second tube accessory on the valve stem by a second conveyor channel (120-2) coupled to the second bowl feeder (120-1); and
receiving, from a third bowl feeder (130-1) holding a set of third tube accessories, a third tube accessory to be assembled on a valve stem; wherein the third tube accessory is assembled on the valve stem by delivering the third tube accessory on the valve stem by a third conveyor channel (130-2) coupled to the third bowl feeder (130-1).
12. The method (500) as claimed in claim 11, wherein the method further
comprises:
on receiving the first tube accessory through the first conveyor channel (110-2), rotating the first tube accessory on the valve stem by a first rotating unit (160) coupled to the first conveyor channel (110-2), the first tube accessory being

assembled on the valve stem upon being rotated by the first rotating unit (160) on the valve stem;
on receiving the second tube accessory from the second conveyor channel (120-2), placing the second tube accessory on the valve stem; and
on receiving the third tube accessory through the third conveyor channel (130-2), rotating the third tube accessory on the valve stem by a second rotating unit (180) coupled to the second conveyor channel (130-2), the third tube accessory being assembled on the valve stem upon being rotated by the second rotating unit (180) on the valve stem.