JP6449285B2 - Disposable sealant liquid canister for repairing inflatable articles and method of manufacturing the same - Google Patents

Description

  The present invention relates to disposable sealant liquid canisters or containers for inflatable articles such as vehicle tire repair and inflation kits.

  The sealant liquid canister includes an air inlet and a sealant liquid and / or an air outlet, and defines an internal space or tank filled with the sealant liquid.

  There is a need for a user-safe canister designed to prevent unintentional leakage of sealant liquids, for example, by modification.

  Patent Document 1 relates to a sealant liquid canister having a tank defined by a bottle, in which a sealant liquid is held by a seal film. The film is punched with a manual punch. The tank is welded to a fluid element having a compressed air inlet and an outlet for injecting sealant liquid and then injecting compressed air. This welding is performed after sealing the sealant liquid in the tank by sticking a film.

European Patent Application No. 2030767 A1

  The present invention provides a disposable sealant fluid canister for inflatable article repair and expansion kits.

  The present invention further provides a compact container.

  The present invention provides a disposable sealant liquid canister for the repair and expansion kit of an inflatable article according to claim 1 and a method for its manufacture according to claim 19.

  Non-limiting embodiments of the present invention will now be described by way of example with reference to the accompanying drawings.

A canister according to a first invention for solving the above-mentioned problems is a disposable canister filled with a sealant liquid, wherein an internal closure for holding the sealant liquid in the canister, a compressed air inlet conduit, and the closure A canister comprising: an outlet conduit for receiving the sealant liquid when in an open position; a first portion integrally formed with at least one of the inlet and outlet conduit; and a second portion. In a usable posture in which the second part is joined by a welded portion to form a tank, and the sealant liquid applies hydrostatic pressure to the closure, the tank holds the sealant liquid by the closure, and the closure A connector that is released by air pressure, and is fixed to the first part; Canister, characterized in that it comprises a fixed seal sealant liquid from between the first portion is prevented from leaking.

  A canister according to a second invention that solves the above problem is characterized in that in the canister according to the first invention, the sealant liquid is held in the tank by welding.

  A canister according to a third invention for solving the above-mentioned problems is the canister according to the second invention, wherein the first portion includes a projection having the inlet or the outlet, and a flange radially extending from the projection, The welding is interposed between the flange and the second part.

  The canister according to a fourth invention for solving the above-mentioned problems is the canister according to the third invention, wherein the flange includes a cylindrical wall on the opposite side of the protrusion, and the welding includes the cylindrical wall and the second part. It is characterized by being interposed between.

A canister according to a fifth invention for solving the above-mentioned problems is the canister according to any one of the first to fourth inventions, wherein the closure has at least one inlet port connected to the inlet, and the outlet. And a movable shutter housed in the casing to close the inlet port and the outlet port in the closed position.

  A canister according to a sixth invention for solving the above-mentioned problems is the canister according to any one of the first to fifth inventions, wherein the welded portion has an inside of one of the first and second portions. The position is such that it is held by gravity.

  A canister according to a seventh invention for solving the above-mentioned problems is characterized in that in the canister according to any one of the first to sixth inventions, the first and second parts are made of the same polymer material. And

  A canister according to an eighth invention for solving the above-mentioned problems is characterized in that in the canister according to any one of the first to seventh inventions, the welded portion is a butt welded portion.

A canister according to a ninth invention for solving the above-mentioned problems is the canister according to any one of the first to eighth inventions, wherein the closure has a fluid connection between the inlet conduit 2 and the outlet conduit 3 via the tank 4. It is configured so that it can be opened, but cannot be closed again .

  A canister according to a tenth invention for solving the above-mentioned problems is the canister according to any one of the first to ninth inventions, wherein at least one of the inlet and outlet conduits is formed integrally with the first portion. It is characterized by.

  A canister according to an eleventh invention for solving the above-mentioned problems is the canister according to any one of the first to tenth inventions, wherein the welded portion is a friction welded portion.

  A canister according to a twelfth invention for solving the above-mentioned problems is a canister according to any one of the first to eleventh inventions, wherein one of the first and second parts is detachable from the canister. It is formed integrally with a male or female element of a shape connection that is fixed to a stand and held in a use position.

  A canister according to a thirteenth invention for solving the above-mentioned problems is provided in the canister according to any one of the first to twelfth inventions, in order to inject the sealant liquid and / or compressed air, A disposable tube that is removably connected is fitted to the outlet conduit.

  A canister according to a fourteenth invention for solving the above-mentioned problems is the canister according to any one of the first to thirteenth inventions, wherein the closure has both the inlet conduit and the outlet conduit in the closed position. It isolate | separates from the said sealant liquid, It is characterized by the above-mentioned.

A canister according to a fifteenth invention for solving the above-mentioned problems is a canister according to any one of the first to fourteenth inventions, wherein the closure is pre-assembled firmly connected to the first part in the closed position. It is characterized by being a unit.

  A canister according to a sixteenth invention for solving the above-mentioned problems is the canister according to any one of the first to fifteenth inventions, wherein both the inlet conduit and the outlet conduit are formed integrally with the first portion. It is characterized by being.

  A canister according to the seventeenth invention for solving the above-mentioned problems is the canister according to any one of the first to sixteenth inventions, wherein the inlet conduit and the outlet conduit are in a state where the closure is opened. Is fluidly connected only through the tank.

  A canister according to an eighteenth aspect of the present invention for solving the above-mentioned problems is the canister according to any one of the first to seventeenth aspects, wherein the liquid level of the sealant liquid is determined when the sealant liquid is injected. It is located above at least one of the inlet and outlet conduits.

  A canister according to a nineteenth invention for solving the above-mentioned problems is a canister according to any one of the first to eighteenth inventions, wherein at least one of the first and second portions has a minimum thickness. And the thickness of the welded region is larger than the minimum thickness.

A canister according to a twentieth invention for solving the above-mentioned problems is characterized in that in the canister according to any one of the first to nineteenth inventions, the number of the welded portions is one.

The canister according to the twenty-first invention for solving the above-mentioned problems is the canister according to any one of the first to twenty- first inventions, wherein the first and second parts are concave and in a welding position. It is characterized by retaining the amount of sealant liquid necessary for repair.

A canister according to a twenty-second invention for solving the above-mentioned problems is characterized in that in the canister according to any one of the first to twenty-first inventions, the closure is surrounded by a sealant liquid.

The canister according to the twenty-third invention for solving the above-mentioned problems is a canister according to any one of the first to twenty-second inventions, wherein the first and second parts are produced by injection molding. It is characterized by.

A method for manufacturing a disposable canister according to the twenty-fourth invention for solving the above-mentioned problems is a method for manufacturing a disposable canister, wherein the canister holds a sealant liquid in the canister and is released by air pressure. A compressed air inlet conduit, an outlet conduit for receiving the sealant liquid when the closure is in an open position, a first portion having one of the inlet and outlet conduits, and closing the first portion, A second portion defining a tank in which the sealant liquid is retained by a closure, the step of fitting the closure into the first portion , and welding the first and second portions together to form the canister And a step of forming.

A method for manufacturing a disposable canister according to a twenty-fifth aspect of the invention for solving the above-described problem is the method of manufacturing a disposable canister according to the twenty-fourth aspect of the invention, wherein one of the first and second portions is concave, In the posture, an amount of sealant liquid suitable for repair is held, and the concave first or second portion is filled with the amount of sealant liquid before the welding step.

A method for manufacturing a disposable canister according to a twenty-sixth invention for solving the above-mentioned problems is the method for manufacturing a disposable canister according to the twenty-fourth or twenty-fifth invention, wherein the closure includes the inlet and outlet conduits. At least one of them is closed and the fitting step is performed before filling the concave first or second part, so that the sealant liquid is held in one of the first and second parts by the closure. It is characterized by making it.

1 is a perspective view including a longitudinal cross-section of a disposable canister according to the present invention. It is a perspective view which shows the detail of FIG. FIG. 6 is a perspective view including a longitudinal cross-section of a disposable canister according to a further embodiment of the present invention.

  Reference numeral 1 in FIG. 1 denotes a disposable sealant liquid canister. The canister 1 includes an inlet conduit 2 connectable to a compressed air source, an outlet conduit 3 connectable to an inflatable article such as a tire, and a tank filled with sealant fluid. 4. The canister 1 further includes a closure 5 that holds the sealant liquid in the tank 4 and prevents the sealant liquid from unintentionally flowing into the inlet conduit 2 and / or the outlet conduit 3 due to gravity or the like. In a usable posture, that is, a posture in which the inlet conduit is pressurized and the sealant liquid is injected, the closure 5 is positioned below the surface of the sealant liquid, and the sealant liquid applies hydrostatic pressure to the stopper.

  The canister 1 preferably has a disposable tube 6 that is irreversibly firmly fixed to the outlet conduit 3 by means of a metal or plastic collar or clamp, for example. The tube 6 may be a hose. The tube 6 may be provided with a releasable connector (not shown) such as a ring nut or a lever-driven press-on connector for connection to a tire valve for injecting sealant liquid or air. Good. For this reason, the tube 6 is replaced with the remaining canister 1 after the sealant liquid has been injected and / or when its expiration date has passed. The canister 1 preferably constitutes a disposable part of the kit, which can be connected to a pressure source to hold the canister in a sealant pouring position and / or an inlet conduit along the air line 2 further includes a portable electric compressor (not shown) that generates an air flow flowing into the air.

  The canister 1 is manufactured more specifically by one-time welding so that the inlet and outlet conduits 2 and 3 and the tank 4 form one welded body. Advantageously, the sealant liquid is held in the tank 4 by a seal in addition to the closure 5.

  Thus, the canister 1 comprises a first part 7 in which at least one of the inlet and outlet conduits 2, 3 is defined, and a second part 8, one of the first and second parts 7, 8 being welded It is concave to hold all the sealant liquid in the posture.

  The first and second portions 7, 8 are made from the same polymeric material and are molded, for example. When both the parts 7 and 8 are produced, injection molding is preferable for molding, and friction welding, particularly rotational friction welding is preferable for welding. In this case, the welding interface between the first and second portions 7 and 8 is circular.

  The welding is preferably butt welding, and when the thickness S2 of at least one welding region 9 provided in at least one of the first and second parts 7 and 8 is formed by friction, It is larger than the minimum thickness S1 of 8. More specifically, the welding region 9 defines an interface I where the first and second portions 7 and 8 come into contact before welding. The welding region 9 may be male and female, respectively, and one may be configured to engage the other and properly position the first and second portions for welding. In the case of butt welding, the interface I preferably comprises a front part I1 (FIG. 2) which is accommodated in a female front part I2. The front part I2 is recessed with respect to the thickness S2 of the second part 8, and the front part I1 is raised with respect to the thickness of the first part 7.

  The first portion 7 preferably has a protrusion P that defines the inlet 2 and / or the outlet 3 and a flange F that extends radially from the protrusion P. The welding is interposed between the flange F and the second portion 8 (FIG. 1).

  In the present embodiment of FIG. 1, the welding region 9 of the second portion 8 is at a position sufficiently away from the upper end 10 of the second portion 8 so as to form a concave shape that can hold all the sealant liquid in the welding posture. Provided.

  The welding posture of the second part 8 is preferably opposite to the posture of FIG. 1, and the liquid level of the sealant liquid in the welding posture reaches the welding region 9 of the second part 8 but does not exceed the welding region 9. . The concave portion of the second portion 8 in the welding posture has a size capable of holding the sealant liquid sufficient for repair, for example, puncture repair, by gravity. A line L in FIG. 1 indicates an approximate liquid level of the sealant liquid when the second portion 8 is in a welding position on a horizontal plane.

  The first part 7 preferably comprises integrally the inlet conduit 2, the outlet conduit 3 and the weld region 9 of the first part 7. Also, in the embodiment of FIG. 1, the closure 5 holds the sealant liquid in the tank 4 when closed and isolates the tank 4 from both the inlet conduit 2 and the outlet conduit 3 until the stopper is released. Connected to the first part 7.

  The closure 5 is advantageously irreversible, i.e. it can be opened so that the inlet conduit 2 and the outlet conduit 3 are in fluid connection via the tank 4 but cannot be closed again by the user. This simplifies the design of the closure 5 and reduces manufacturing costs.

  The closure 5 may be a pre-assembled unit manufactured separately from the other components of the canister 1 and includes a connector 11 for fixing to the first portion 7. The closure 5 preferably comprises a shutter 12 that closes the tank 4 with respect to the inlet conduit 2 and / or the outlet conduit 3. The shutter 12 is connected to the first portion 7 by the connector 11 and is fitted to the connector 11.

  In the embodiment of FIG. 1, the shutter 12 is housed in a casing 13 and is movable with respect to the sleeve 14. The casing 13 and the sleeve 14 are firmly connected to the first portion 7 by the connector 11, and the shutter 12 slides while being guided by the casing 13 and / or the sleeve 14.

  A seal 15 that is carried by the shutter 12 and slides along the casing 13 and a seal 16 disposed between the shutter 12 and the sleeve 14 are provided.

  The casing 13 has one or more inlets 17 and one or more outlets 18 (FIG. 2). The sleeve 14 is hollow so that the inlet conduit 2 is connected to the inlet 17 when the shutter 12 is in the open position (FIG. 1). The outlet 18 is, in the open position, an outlet conduit via a movable channel 19 provided in the shutter 12 and a fixed channel 20 defined by or between the sleeve 14, the shutter 12 and the casing 13. 3 is connected. In the open position, the movable channel 19 connects to the fixed channel 20 and the seal 15 isolates the inlet 17 from the outlet 18 in the casing 13.

  In the closed position, ie, when the closure 5 is assembled, the shutter 12 closes both the inlet 17 and outlet 18 with respect to the inlet and outlet conduits 2, 3 by seals 15, 16. More specifically, one seal 15 fluidly isolates the sleeve 14 from the inlet 17, and the other seal 15 closes the outlet 18 and disconnects it from the movable channel 19. In the closed position (FIG. 3), the shutter 12 is higher than the position of FIG. In order to move the shutter 12 to the open position, the shutter 12 is pushed down by applying a high pressure to the head T of the shutter 12 in the casing 13. This high pressure is generated by a pressure source connected to the inlet conduit 2. When the shutter 12 is in the open position, high pressure flows into the tank 4 through the inlet 17 and thereby pushes the sealant fluid out of the outlet 18 connected to the pressure of the article to be repaired. When the level of the sealant liquid falls below the outlet 18, the compressed air substantially flows to the outlet conduit 3.

  Further, a fixed seal 21 is provided to prevent the sealant liquid from leaking from between the connector 11 and the first portion 7 to the outlet conduit 3.

  The connector 11 is preferably fitted to the first part 7 by a shape connection which is a combination of a screw connector 22 and a self-locking stop 23. The screw connector 22 is preferably adjusted to apply pressure to the seal 21 when rotated. The self-lock stop 23 comprises a combination of one or more flexible tabs 24 and an asymmetric stop 25. When the screw connector is rotated, the flexible tab 24 bends upward along the inclined surface 26 of the asymmetrical stop 25 until the connector 11 reaches an axial stop position relative to the first portion 7. In the loosening direction indicated by the arrow F, the stop surface of the asymmetrical stop 25 prevents the tab 24 from being caught and bent, thus preventing the screw connector from loosening.

  The canister 1 is manufactured as follows.

  Each of the first and second portions 7, 8 is preferably molded integrally.

  The closure 5 is fitted into the first part 7 in the closed position.

  A sufficient amount of the sealant solution for repair is filled up to the height of the line L in the second portion 8 with the welding region 9 facing upward and the upper end 10 facing downward.

  In order to close the second part 8 filled with the sealant solution, the first part 7 is fitted to the second part 8 and then the two parts are welded.

  FIG. 3 shows another embodiment of the present invention. The disposable canister 1 ′ of this embodiment is concave in that the first portion 7 ′ can hold a sufficient amount of sealant fluid for repair when the first portion 7 ′ is closed by the closure 5, and the second portion 8 ′ is substantially 1 is the same as FIG. 1 except that it is in the form of a lid welded to the first portion 7 ′. More specifically, the welding region 9 of the first portion 7 ′ is provided at a position sufficiently away from the closure 5 so as to define a sufficient volume capable of holding the amount of sealant liquid required for repair. In this embodiment, the welding posture of the first portion 7 'is as shown in FIG. Preferably, the flange F ′ of the first part 7 ′ comprises a cylindrical wall C extending from the part opposite the projection P ′ so as to define a volume holding the sealant liquid both before and after welding. .

  In the embodiment of FIG. 3, the closure 5 has an inlet before the sealant liquid is filled into the first part 7 ′ in order to keep a suitable amount of sealant liquid in the first part 7 ′ during the welding operation. It must be fitted in the first part 7 ′ so as to close the conduit 2 and the outlet conduit 3. FIG. 3 shows the closure 5 in the closed position.

  The components of the canister 1 'other than those specified above are the same as the components of the canister 1 as shown by the use of the same reference symbols without the shoulders.

  The disposable canister 1, 1 'according to the present invention has the following advantages.

  The welding protects against attempts to modify the sealant liquid canister 1, thus improving the safety of the sealant liquid canister 1. In particular, since the closure 5 is protected in the canister when the canister is welded, it cannot be damaged or modified by the user. The sealant liquid is preferably injected into the canister before the canister is welded so that it can be used once the canister 1 is welded. Thus, the sealant liquid can be inspected while already in the part 8 or 7 '. In particular, when the closure 5 is already fixed at the use position during assembly, the sealant liquid is exposed to the external environment.

    It is particularly advantageous if the closure 5 is made irreversible and the canister 1 is filled with the sealant solution and then the closure 5 is fitted so that it is opened only during repairs.

  The welding is performed in an area where the canister is particularly compact. In particular, in order to prevent damage to the closure due to heat generated by welding and / or flushing, the casing 13 is accommodated so that its side is immersed in the sealant liquid, and welding is performed in a region away from the closure 5. be able to. This damage is especially the case both when moving shutters are used (movable shutter guides can be deformed) and when materials with low melting points such as seal ring or seal film materials are used. It can happen.

  It will be appreciated that the disposable canisters 1, 1 'described and illustrated herein may be modified without departing from the scope of protection defined by the appended claims.

  The inlet and outlet conduits 2 and 3 may be provided at positions different from those illustrated. Usually, at least one of the inlet and outlet conduits 2, 3 is located below the level of the sealant liquid, and the sealant liquid is injected below the liquid level into the inflatable article for repair.

  The closure 5 may also be different from that shown. For example, the closure 5 may include a reversible valve that automatically returns to the closed position when the injection of the sealant liquid is complete or interrupted by the user, for example.

  Although the specification describes a closure 5 that is opened by air pressure, that is, an air shutter, other types of closures exist both irreversibly and reversibly. Examples of the irreversible closure include a tear film, and examples of the reversible closure include a valve. In either case, the closure 5 may be opened manually by the user, for example using a release control or a tool.

  The first part 7 is preferably designed such that a detachable shaped joint male or female element 28 is formed for connection to a stand that supports the canister 1 in the pouring position. Advantageously, the male or female element 28 is provided on the projection P. The first part 7 further preferably comprises a seal 27, in particular a seal ring, which simultaneously defines both a mechanical connection to the stand and a liquid tight connection to the delivery side of the compressor. In the latter case, the seal ring is fitted into the inlet conduit 2 and the inlet conduit 2 is also formed with male or female elements. In this regard, the male or female element 28 is configured to be connected to the compressor in two stages. That is, in one stage, a mechanical connection to a support suitable for supporting the weight of the canister 1 and holding the canister 1 in a usable position, for example in a vertical position, is preferably made in International Publication WO-A1-2050850028. In the second stage, the fluid connection between the pressure source and the inlet conduit 2 is preferably performed by a hose connected directly to the canister 1. According to yet another embodiment, the male or female element 28 is configured to provide both a mechanical connection and a fluid connection in one motion by a snap connection, the fluid connection preferably being sealed by a seal 27. Is done. Specifically, the snap connection is a connection in which the canister 1 is connected in a state where the weight of the canister 1 is supported by the support portion, and the canister 1 is held in a substantially vertical posture for use. At the same time, the snap connection defines a liquid-tight connection between the inlet conduit 2 and a conduit fixed to the pressure source and receiving compressed air.

  The connector 11 may advantageously be formed integrally, for example molded, with the casing 13.

  When the shutter 5 is assembled, at least the seal 21 and the sleeve 14 are fixed so as not to rotate. The casing 13 may also be fixed as torque is applied to the connector 11. If both are formed integrally, the casing 13 rotates relative to the sleeve 14 and the seal 21 when torque is applied to the connector 11. Since the seal 21 is compressed between the sleeve 14 and the first portion 7, it is compressed without excessive twisting.

  Instead of the tab 24, any self-locking screw means may be used.

  The seal 27 next to the outlet conduit 3 may be omitted.

Claims (26)

A disposable canister filled with a sealant solution,
An internal closure (5) for holding the sealant liquid in the canister (1);
A compressed air inlet conduit (2);
An outlet conduit (3) for receiving the sealant liquid when the closure (5) is in an open position;
A first portion (7) formed integrally with at least one of the inlet and outlet conduits (2, 3);
A canister comprising a second part (8),
The first and second parts (7, 8) are joined by welds to form a tank (4),
In a usable posture in which the sealant liquid applies hydrostatic pressure to the closure (5), the tank (4) holds the sealant liquid by the closure (5),
The closure (5) is released by air pressure, and has a connector (11) for fixing to the first part (7) and a sealant between the connector (11) and the first part (7). A canister comprising a fixed seal (21) for preventing liquid from leaking.   Canister according to claim 1, characterized in that the sealant liquid is held in the tank (4) by welding.   The first portion (7) includes a protrusion (P, 28) having the inlet (2) or the outlet (3), and a flange (F; F ′) radially extending from the protrusion (P, 28). The canister according to claim 2, wherein the welding is interposed between the flange (F) and the second part (8).   The flange (F ′) includes a cylindrical wall (C) on the opposite side of the protrusions (P, 28), and the welding is interposed between the cylindrical wall (C) and the second portion (8). The canister according to claim 3, wherein:   The closure (5) has a casing (13) having at least one inlet port (17) connected to the inlet (2) and at least one outlet port (18) connected to the outlet (3). And a movable shutter (12) housed in the casing (13) to close the inlet and outlet ports (17, 18) in a closed position. The canister according to any one of 4.   6. The weld according to any one of claims 1 to 5, wherein the weld is in a position such that the sealant liquid is held by gravity inside one of the first and second parts (7, 8). The canister according to one item.   Canister according to any one of the preceding claims, characterized in that the first and second parts (7, 8) are made of the same polymeric material.   The canister according to any one of claims 1 to 7, wherein the welded portion is a butt welded portion.   The closure (5) is configured such that the inlet conduit 2 and the outlet conduit 3 can be opened to fluidly connect via the tank 4, but cannot be closed again. The canister according to any one of the above.   10. At least one of the inlet and outlet conduits (2, 3) is formed integrally with the first part (7), according to any one of the preceding claims. Canister.   The canister according to any one of claims 1 to 10, wherein the welded portion is a friction welded portion.   One of the first and second parts (7, 8) is formed integrally with a shape-coupled male or female element (28) that removably secures the canister to a stand and holds it in use. The canister according to any one of claims 1 to 11, wherein:   Disposable tube (6) removably connected to an inflatable article for injecting the sealant liquid and / or compressed air is fitted into the outlet conduit (3). The canister according to claim 12.   14. The closure (5) according to any one of claims 1 to 13, characterized in that in the closed position both the inlet conduit (2) and the outlet conduit (3) are isolated from the sealant liquid. Canister as described in   15. The canister according to any one of the preceding claims, wherein the closure (5) is a pre-assembled unit that is firmly connected to the first part (7) in a closed position. .   16. The inlet conduit (2) and the outlet conduit (3) are both formed integrally with the first part (7), according to any one of the preceding claims. Canister.   The inlet conduit (2) and the outlet conduit (3) are fluidly connected only through the tank (4) with the closure (5) open. Item 17. The canister according to any one of items 16.   18. The liquid level of the sealant liquid is located above at least one of the inlet and outlet conduits (2, 3) when the sealant liquid is injected. The canister according to claim 1.   At least one of the first and second portions (7, 8) has a minimum thickness (S1), and the thickness (S2) of the welded region (9, I) is larger than the minimum thickness. The canister according to any one of claims 1 to 18, characterized by:   The canister according to any one of claims 1 to 19, wherein the number of welded portions is one.   21. One of the first and second parts (7; 8), wherein one of the first and second parts (7; 8) is concave and holds an amount of sealant required for repair in a welding position. The canister according to one item.   The canister according to any one of claims 1 to 21, wherein the closure (5) is surrounded by a sealant liquid.   The canister according to any one of claims 1 to 22, wherein the first and second portions are manufactured by injection molding. A method for manufacturing a disposable canister, comprising:
The canister (1) holds the sealant liquid in the canister (1) and is released by air pressure, the compressed air inlet conduit (2), and the closure (5) in the open position. In some cases, by closing the outlet part (3) for receiving the sealant liquid, a first part (7) having one of the inlet and outlet conduits (2, 3), and closing the first part (7), A second part (8) defining a tank (4) in which the sealant liquid is held by a closure (5),
Fitting the closure to the first part (7) ;
And a step of welding the first and second parts together to form the canister. One of the first and second parts is concave, and holds a suitable amount of sealant liquid for repair in a welding position;
25. A method according to claim 24, characterized in that, before the welding step, the concave first or second part (7, 8) is filled with the amount of sealant liquid. The closure (5) closes at least one of the inlet and outlet conduits (2, 3);
The fitting step is performed before filling the concave first or second part, and the sealant liquid is held in one of the first and second parts (7, 8) by the closure (5). 26. A method according to claim 24 or 25, characterized in that:

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