Abstract: A tire changing device for mounting and dismounting tires from wheel rims having a rod, and a base with a working surface for placement of wheel rims thereon. The rod is attached to the base such that the rod is disposed substantially perpendicular to the working surface. The tire changing device also has a bracket for engaging with the rod, such that a wheel can be clamped and held interposed between the bracket and the working surface. The base of the tire changing device is rigidly held in place by clamping in vice jaws or affixing to a work bench.

Abstract: A tire repair tool includes a compartment (13; 51) for containing tire cement (15; 54, 56) therein, and a cap (14; 17) removably connected to the tire repair tool for housing the tire cement.

Abstract: A tire iron for mounting and demounting tires from rims. The demounting head has a ball and neck for confining the tire bead and rim edge while the tire bead is peeled off. The mounting head also contains a ball and neck for similarly confining the tire bead. The mounting head is affixed to the tire iron so that it is substantially perpendicular to the plane of the rim while mounting a tire. The tool has flattened sides to maintain the direction of the mounting head while in use. Due to the unique ball and neck design, the tire tool has a working angle of 10.degree. to 60.degree. from the plane of the rim and can be used in a clockwise or counter clockwise direction.

Abstract: A tire lever is adopted for use in removing a tire having a bead from a bicycle wheel rim having a plurality of spokes disposed thereon. The lever includes an elongated body having an axis, and including a tire engagement end for engaging the bead of the tire, a top surface, a bottom surface, a side surface connecting the top and bottom surfaces, and walls projecting from opposite side surfaces defining engagement surfaces for engaging one of the spokes. The engagement surfaces have axial lengths greater than the distance between the top and bottom surfaces and forms an acute angle with the axis.

Abstract: A tool for use in conjunction with a center-post tire changing machine for mounting and demounting pneumatic tires from wheel rims includes an elongated shaft member having first and second ends wherein a portion of the elongated shaft member defines a main plane of the tool. A tire mounting portion at the first end includes a rounded first face forming a bead contact area, a flat second face forming a rim contact area, and a retaining knob protruding from the flat second face, the tire mounting portion being angularly offset from the main plane vertically by a first bend and horizontally by a second bend. A tire demounting portion at the second end includes a rounded first face forming a bead contact area, a flat second face forming a rim contact area, and a retaining knob protruding from the flat second face. The tire demounting portion is angularly offset both horizontally and vertically from the main plane by a third bend.

Abstract: An inflation/repair device for bicycle tires includes a pumping device including a head, a handle, and a piston rod having a first end slidably received in the head and a second end securely attached to the handle move therewith. The handle is releasably, securely engaged with an axle of a wheel. A tire removing/mounting member is mounted the head to engage with an inner peripheral end edge of a tire mounted on a rim of the wheel for removing the inner peripheral end edge of the tire out of the rim or mounting the inner peripheral end edge of the tire into the rim.

Abstract: A tire lever for removing tires from wheels having an axle and installing tires thereon provides separate hooks for removal and installation, an attachment to the wheel axle and length adjustment for accommodating different size wheels. Tire removal and installation is accomplished by rotating the lever around the wheel using the axle as a center of rotation while the appropriate hook engages the tire bead.

Abstract: A bead lifting lever having a curved body that ends with at least one tip provided with a rounded and expanded tip edge.

Abstract: The improved tire changer tool set of the present invention includes a tire rim engager and a lever. The tire rim engager is in the form of a disc having a depending peripheral portion which may be a detachable ring and which is adapted to securely seat the engager in the rim of a tire. The tire rim engager also includes an upstanding generally central post having an expanded top which retains the lever in position around the post. The tire rim engager can have an annular recess on its bottom surface to receive the top portion of the detachable ring. Such ring can be held in place with screws through the disc and ring. Rims of different diameters can be installed on the disc. The lever is long and generally flat with two portions connected by a step so that when the lever is connected to the post by a side notch in the lever, one portion of the lever is raised and can act as a handle in rotating the lever around the post.

Abstract: A tool combination includes two tool assemblies that may be secured together by an engagement between a dovetail slot and a dovetail. The tool assemblies each includes a number of rotatable tools. One of the tool assemblies includes a rib formed on one side. The other tool assembly includes a knob pivotally engaged in a housing. The knob includes a projection for engaging with the rib. A spring may bias the projection of the knob to engage with the rib so as to secure the tool assemblies together. The tool assemblies each includes a spanner for engaging with and for repairing bicycle tire.

Abstract: A method and an apparatus for contouring the shoulder areas of retreaded tires is disclosed. A cutter, preferably having a heated blade, is disposed proximate at least one shoulder of a retreaded tire. The retreaded tire is then rotated, while the cutter blade is moved into contact with the side wall of the tire proximate the joint between the tire casing and the tread layer. A portion of the tire casing and the tread layer is cut away along the entire shoulder area of the retreaded tire to provide an aesthetically pleasing contoured surface extending from the tire casing to the tread layer.

Abstract: An apparatus for plotting a tread pattern on a vulcanized tire (2 ) which is mounted to a rim (7 ) rotatably supported by a primary framework (5 ) and oscillatable about two axes (Z, X) perpendicular to each other and to the axis of rotation (Y) of the tire (2 ). A signal from an electronic computer into which a base data sequence relating to a trace pattern to be reproduced on the tire is stored, is fed with a detection data sequence relating to the surface extension of said tire. The base data are processed depending on the detection data sequence for creating an application data sequence, so that, based on said application data, the electronic computer operates a laser beam emitter (10 ) carrying out plotting of the required trace pattern on the outer surface of the tire, as the sum of subsequent distinct portions, each of them being plotted, while the tire is stationary, through oscillations of the laser beam within a cone of predetermined width.

Abstract: A bicycle tool assembly which includes a hollow handle, a coupling block fastened to one end of the handle by a tongue-and-groove joint to hold a driving element, for example, an open-end spanner, a box-end spanner, a hexagonal wrench, a cabinet tip, a Phillips head tip, or a hexagonal head tip, and a tire repair tool slidably mounted in an opposite end of the hollow handle, the tire repair tool having a front hook for pulling a bicycle tire out of the rim, a tire pressure releasing pin in the middle for fastening to the valve of the bicycle tire to release the pressure of the inner tube, and a coupling tail engaged with a tapered hole in the hollow handle to hold the tire repair tool in the operative position.

Abstract: An implement for facilitating the mounting of tires onto respective wheel rims, typically for tire removal machines including a horizontal self-centering unit (4) and a projecting horizontal arm (6), on the end of which there slides a height-adjustable vertical rod (8) which is provided lowerly with a tool (9) for mounting and removing tires (10). The tire mounting machine includes a shaped arm which at one end is provided with a projecting profiled head (18), and at its other end is mounted rotatable and slidable on said vertical rod (8) so as to occupy a raised rest position and a lowered working position in which said head can be inserted between the edge of a wheel rim (44) locked by the self-centering unit and the bead (110) of the tire (10) to be mounted, the head resting against that wheel rim part (42) forming the seat for receiving the bead.

Abstract: This invention relates to a double headed tool which engages the rim of the tire. A first head is contoured to assist in engaging the bead of the tire to promote engaging the tire with the rim. A second head is designed to assist in stripping the tire from the rim. This tool is deigned to be used in combination with a tire changing stand which has a central post.

Abstract: Tubeless tire demounting tools which include a dual handle roller tool, a double hook bracket tool and a shoe tool which are used in various combinations to demount vehicle tires from wheel rims. The double hook bracket tool is initially fitted on the rim flange of the wheel rim after the tire has been deflated and the dual handle roller tool is then positioned into engagement with the double hook bracket, between the tire and wheel rim to facilitate partial demounting of the top bead of the tire. The double hook bracket is then repositioned across a diameter of the wheel rim and the shoe tool is positioned in engagement with the double hook bracket between the tire and wheel rim for demounting the opposite tire beads of the tire from the wheel rim.

Abstract: Tire tool of the tire iron type formed entirely by forging from previously unforged steel bar stock having a reverse curved centifuration and depending integral elements formed only by forging operations.

Abstract: The present invention involves a tire buffing apparatus. A rasping or buffing element is mounted in a manner which allows a compound radius to be formed in the shoulder of the tire casing without removing the rasp from the surface of the tire casing during the buffing operation. A tire casing rotating assembly includes a system for mounting the tire casing and rotating the casing. A pedestal is movable toward and away from the rotating tire casing. The pedestal is pivotable about the central axis of the pedestal and rotatable over a predetermined arc about a vertical axis spaced from the central axis of the pedestal. A rasp is mounted rearwardly and offset from the central axis of the pedestal.

Abstract: An apparatus for reducing extra large vehicle tires to particles or to prepare them for recapping comprises a tire holder assembly, made up of a set of dual jacks, in combination with a rotary cutter blade assembly made up of a side-by-side series of discs carrying cutter blades of chisel type. The set of dual jacks are preferably carried by an arbor having opposite shaft ends adapted to matingly interconnect with corresponding ends of a motivating shaft for quick and easy interchange of one size tire holder assembly for another size. When the tire is to be recapped, arcuate attachments are secured to members of the tire holder assembly that contact a tire bead so as to preserve the circumferential integrity of such bead during cutting, and the cutter blade assembly is replaced by wire buffing brushes following removal of the tread portion of the tire by cutting.

Abstract: Dust collection apparatus for collecting dust during the grinding of tires includes a collection head mounted on the end of an arm, the collection head having a series of brushes which are arranged to contact the surface of the tire in proximity to where the grinding is taking place, in order to remove and trap the dust. Vacuum aspiration removes the trapped dust from the area surrounded by the brushes, and conveys it away for disposal, preferably via the arm, the arm being hollow for that purpose. The brushes are arranged such that all or substantially all of the tire surface which has been ground is subjected to the brushes. The dust collection apparatus is preferably attached to the arm which carries the grinding wheel used in the grinding machine, such that when the grinding wheel is moved into position against the tire, the dust collection apparatus moves with it, and is positioned against the tire.

Abstract: A tool for removing a tire from a wheel rim includes an elongated body member with a handle at one end and a tool head at the other end. The tool head includes a tire engaging member having at least one tire bead support and terminating in at least two laterally spaced apart tire contact parts. The tool head further includes a rigid, L-shaped wheel rim engaging member terminating in a wheel rim contact part. The wheel rim contact part is sufficiently spaced from the tire engaging member to accept a wheel rim flange therebetween. In a preferred embodiment, each of the at least two tire contact parts and the wheel rim contact part has a rotatable roller.

Abstract: A tire holding fixture comprises upper and lower simulated wheel halves disposed about upper and lower wheel half supports, and a guide disposed coaxially with respect to the wheel half supports. The guide cooperates with the wheel halves and wheel supports so as to center a tire upon the tire holding fixture. The upper wheel half support is designed to be inserted into the lower wheel half support. There are noncontinuous no-lead thread segments disposed about the interior of the lower wheel half support, and about the exterior of the upper wheel half support. These thread segments are designed to be interengagable so as to form a multiple stepped bayonet retention system, capable of holding the wheel supports together. Locking pins are translatable within the wheel half supports so as to allow corotation of the wheel half supports for processing a tire.

Abstract: An automatic spew trimming method wherein a tire is rotated while being supported from an inside to be trimmed by a knife and an apparatus used therefor. The apparatus includes a supply conveyer, a tire rotating section, a cutter for tire tread, a cutter for sidewall, and a discharge conveyer. According to the method and the apparatus of the present invention, even a tire such as a motor cycle tire having low rigidity, small tread width and nearly complete round cross section can be trimmed to cut off spew. Further, even if many kinds of tires of different sizes are supplied at random, they can be satisfactorily accommodated and treated.

Abstract: This device, designed for recutting the grooves of pneumatic tire treads, is composed of a knife whose shape corresponds to the said groove section to be recut and an adjustable depth guide that presses against the bottom of the existing groove before making it deeper, so that the depth of the cutting is determined by the existing distance (d) between the said knife and the depth guide.

Abstract: The tire removing machine has a resting base, a hollow support rigidly connected to the base and provided with a supporting flange for supporting motor vehicle wheels. A hollow securing shaft extends in the base and protrudes from the support, perpendicularly to the flange. A wheel centering and securing cone is anchored to the securing shaft outside the flange. A traction pin is rotatably accommodated in the shaft and extends beyond the centering cone where it ends in a traction head. A tool-holder bar with tool for mounting and removing a tire is at least temporarily coupled to the traction head.

Abstract: A skiving equipment which permits a great reduction of labor and also permits the skiving work to be done always to an appropriate extent.

Abstract: A bicycle wheel lever for removing a tire from a bicycle wheel rim is disclosed. The bicycle wheel lever has an elongate rod having a first end and a second end. The first end of the elongate rod is substantially planar and has a broadened face portion and a curved lip. An arm on the second end of the elongate rod is oriented substantially perpendicular to and angled upwardly from the elongate rod. The arm has a hexagonal cross-section. The bicycle tire lever separates a bicycle tire from a wheel rim by placement of the first end of the elongate rod between a bicycle tire and a wheel rim, by pivotal movement of the elongate rod toward the wheel spoke, and by bracing any portion of the length of the arm against the wheel spoke to secure the bicycle wheel lever.

Abstract: A tire splitting apparatus for splitting tire casings circumferentially into segments which includes a frame having a generally horizontal tire support table. Tire casing drive means are associated with the support table such that the drive means drivingly engages the outer crown of a tire casing and rotates the tire casing on the support table. Also included are at least two opposing guides for engaging the outer crown of a tire casing such that a tire casing situated on the support table rotates substantially over the center of the support table. A tire casing situated and rotated on the support table may be cut circumferentially with slicing means mounted on the support table generally opposite the drive means. Finally, adjustment means are provided for selectively engaging tire casings of varying diameters.

Abstract: A tire grooving apparatus according to the present invention consists of a movable block (5) movable at least in a lateral direction parallel with a tire support shaft, a vertically movable block (7) provided on the movable blocks, and a pivotable arm (81) provided on the block (7) and having a cutter support device (9) at the free end portion thereof, characterized in that the apparatus is further provided with a center deviation detector (13) for detecting a deviation of center line of a tire tread surface, or both the center deviation detector (13) and a lateral runout detector (14). A tire grooving method according to the present invention is characterized in that an actual measurement obtained by the center deviation detector (13), or both an actual measurement obtained by the center deviation detector (13) and an actual measurement obtained by the lateral runout detector (14) are utilized for the correction of the quantity of movement of a cutter (10).

Abstract: A portable apparatus is provided for dislodging a tire bead from the bead seat of a wheel rim of a vehicle. The apparatus includes a pair of telescoping tubes (12, 14) which carry wheel rim engaging clamps (16, 18) at opposing outer ends of the tubes. The telescoping tubes are fixedly adjustable which allows the clamps to engage diametrically opposite portions of the wheel rim and to be tightened in place. A bead breaker foot (26) is carried at the outer end of tube (12) adjacent to engaging clamp (16). The breaker foot is movable and can be adjusted downwardly to break the tire away from the wheel rim.

Abstract: A method and apparatus for buffing a tread is described. The method comprises mounting a tread on an apparatus capable of bufffing the casing engaging surface of said tread, the apparatus buffing the tread such that the grooves are formed on the buffed tread surface. The grooves angularly intercept a tread edge.

Abstract: A fully portable device for breaking the bead of a rubber tire from a wheel rim comprises an adjustable closeable loop strap mechanism, adapted to loop around a section of the wheel and tire, in a plane generally radial from the center of the wheel. The device includes a power screw link that is positioned directly over a portion of the tire sidewall, such that a foot on a power screw threaded into and through the link can engage the tire sidewall adjacent the rim. With the loop strap mechanism tightened down around the wheel and tire, turning the power screw urges the tire sidewall inwardly to pull the bead away from the wheel rim.An urging tool is also provided for insertion into the gap between the rim and the bead to pry or otherwise leverage the bead up and over the annular safety flange of "safety rim" type cycle wheels.

Abstract: An automatic apparatus for removing tread from beads of various sized tires is disclosed. The automatic apparatus includes a tire centering device for vertically orienting the tire so that the radial center axis of the tire is positioned along a horizontal reference axis. The tire centering device includes a catch box having movable side walls and movable bottom plates to accomplish this centering. After the tire is centered, the tire is moved to a tire gripping device which grips the rim of the tire. Thereafter, a tire cutter device is moved in position to cut the tread from the bead of the tire as the tire is turned one revolution. Finally, a tire ejecting device is actuated to eject the remaining bead of the tire from the tire gripping device so that the cycle can be repeated.

Abstract: A tire grooving apparatus according to the present invention consists of a movable block (5) movable at least in a lateral direction parallel with a tire support shaft, a vertically movable block (7) provided on the movable blocks, and a pivotable arm (81) provided on the block (7) and having a cutter support device (9) at the free end portion thereof, characterized in that the apparatus is further provided with a center deviation detector (13) for detecting a deviation of center line of a tire tread surface, or both the center deviation detecetor (13) and a lateral runout detector (14). A tire grooving method according to the present invention is characterized in that an actual measurement obtained by the center deviataion detector (13), or both an actual measurement obtained by the center deviation detector (13) and an actual measurement obtained by the lateral runout detector (14) are utilized for the correction of the quantity of movement of a cutter (10).

Abstract: A tool for installing a tire on a wheel rim includes an elongated body member with a handle at one end and a tool head at the other end. The tool head has a tire engaging member terminating in an insertion end and a contact end. The tire engaging member has a back face attached to a connector portion of the elongated body member, and a front face on an opposite side of the tire engaging member. A tire contact part extends above the front face at the contact end. A wheel rim contact member extends from the back face and terminates in a wheel rim contact part. A portion of the tire engaging member between the insertion end and the wheel rim contact member is insertable between a tire bead and a rim flange.

Abstract: A tool for removing a tire from a wheel rim includes an elongated body member with a handle at one end and a tool head at the other end. The tool head includes a tire engaging member terminating in at least two laterally spaced apart tire contact parts, and a rigid, L-shaped wheel rim engaging member terminating in a wheel rim contact part. The wheel rim contact part is sufficiently spaced from the tire engaging member to accept a wheel rim flange therebetween. In a preferred embodiment, each of the at least two tire contact parts and the wheel rim contact part has a rotatable roller.

Abstract: A spacer is provided for an essentially cylindrical tool on whose circumference arc-shaped blades are mounted with spacers between them by means of bolts extending in the axial direction through the spacers. The spacer is made of steel sheet and has tangs bent out of the plane of the sheet. The tangs determine the distance between neighboring blades and are disposed on the inside edge and outside edge of the spacer oriented in the circumferential direction of the tool and the spacer. The tangs situated side by side in the circumferential direction have spaces between them in order to make a simple adaption to different distances between neighboring blades possible while simultaneously improving the removal of heat.

Abstract: For removing projecting parts from tires by enbrittlement of the tire and breaking the projecting parts, a breaking tool comprising a ribbed flexible strap suspended in a frame so as to conform to the profile of an embrittled tire supported therein removes projections with movement of the tire.

Abstract: A tire grooving apparatus according to the present invention consists of a movable carriage (3) adapted to be moved at least in the direction parallel with a tire support shaft (21), a vertically movable block (32) provided on the carriage (3) and adapted to be moved freely in the vertical direction, and a pivotable arm (4), provided on the block (32), having a cutter support unit (5) at the free end portion thereof. The cutter support unit (5) of the invention is movable up and down independently of movable block (32). As the cutter support unit (5) which is attached to the free end portion of the pivotable arm (4) can be so moved up and down independently, the depth of a tread pattern groove can be adjusted and a cutting position of a cutter (6) set arbitrarily, without replacing the cutter (6), without moving the block (32) vertically and without need of a program for correcting the quantity of movement of the cutter.

Abstract: A method and an apparatus for compensating a radial deflection and/or a lateral deflection in tire grooving wherein a cutter movement is controlled by a plurality of operating shafts and a desired pattern grooves are formed in a tire surface, wherein the radial deflection in a direction along diameter of the tire, which is supported by a tire supporting shaft, and/or the lateral deflection in a direction along diameter of the tire are detected before or during tire grooving, an a radially driving member, which moves a cutter in a direction along diameter of the tire, and/or a laterally driving member, which moves a cutter in a direction along width of the tire, are actuated in accordance with a reference program, and concurrently a movement of the radially driving member and/or a movement of the laterally driving member are adjusted in accordance with a correction program based on the detected deflection value in order to follow the radial deflection and/or the lateral deflection.

Abstract: A cutter supporting unit for a tire grooving apparatus having a tire supporting shaft and a cutter supporting unit which brings a cutter in or out of contact with a tire held by the tire supporting shaft, wherein that said cutter supporting unit includes a cutter holder which holds the cutter and a cutter supporting frame to which the cutter holder is releasably connected. The unit largely reduces time and labor necessary for the cutter replacement and improves tire grooving productivity.

Abstract: An apparatus used as an aid in the removal of low-pressure tires from wheels of all-terrain vehicles (ATV's) functioning as a "bead breaker". The tool includes a support base for receiving wheel and tire, a linkage-supporting upright post extending upwardly from said support base, a pair of operators, listed in respect to their actual operating sequence as, (1) an operator for actuating tire sidewall clamping device, (2) an operator for actuating bead press shoe, a bead press shoe and fastening devices for each operator. A unique feature of the tool being its ability to clamp an ATV tire sidewall and hold same in a fixed position relative to the tire bead press shoe thereby insuring collapse of the tire bead during downward movement of tire bead press shoe.

Abstract: A method and an apparatus for compensating a radial deflection and/or a lateral deflection in tire grooving wherein a cutter movement is controlled by a plurality of operating shafts and a desired pattern grooves are formed in a tire surface, wherein the radial deflection in a direction along diameter of the tire, which is supported by a tire supporting shaft, and/or the lateral deflection in a direction along diameter of the tire are detected before or during tire grooving, an a radially driving member, which moves a cutter in a direction along diameter of the tire, and/or a laterally driving member, which moves a cutter in a direction along width of the tire, are actuated in accordance with a reference program, and concurrently a movement of the radially driving member and/or a movement of the laterally driving member are adjusted in accordance with a correction program based on the detected deflection value in order to follow the radial deflection and/or the lateral deflection.

Abstract: A tire bead breaker which can be portable comprising a base upon which a tire and wheel can be located and having a stop at one end to restrict outward movement of the wheel and tire, an arm assembly connected to the base at a spacing from the stop to permit a wheel and tire to be located therebetween which carries a breaker assembly pivotally connected thereto which assembly includes telescopic members one of which is connected to the arm and the other of which has a breaker plate at its free end the arrangement being that the breaker plate can be moved towards and located between the rim and the tire and by relative movement between the plate and the stop the breaker plate can move inwardly and a hydraulic or screw jack provided to rotate the breaker assembly about its pivot to effect separation of the tire from the rim.

Abstract: The lever comprises a support in the form of an inverted angle iron in which the horizontal part is curved and bears on the cheek of the tire being removed and the vertical part bears on the tire bead and the wheel rim, said vertical part being extended by a hooking element meant for insertion between the tire bead and the wheel rim so that the tire can be removed, an arm fixed at an angle to the vertical plane on the horizontal part of said support, and a grip fixed to the end of said arm.

Abstract: An apparatus and a method of reducing pollution for tire buffing equipment by which a narrow air stream curtain is directed across the cutting width of a rasp immediately ahead of the tread grinding area to contain dust or other small tread materials particles emitted during buffing. Water in the form of a mist is directed between the air curtain and the rasp for mixing with the air to congeal or coagulate the dust and tread material particles into larger size particles which are more efficiently handled by an exhaust or collecting system.

Abstract: A tire demounting apparatus for a tire secured to a wheel rim, having a actuating lever, pivotably supported on the wheel about a first pivot axis, and a tire bead holder pivotably supported on the actuating lever about a second axis. The tire bead holder has an engagement portion engaging the tire bead. Upon pivoting of the actuating lever in the intended demounting pivot direction, the tire bead holder engaging the tire bead pivots in the opposite direction on the actuating lever, thereby engaging a tire bead portion to be released. The portion engaged by the tire bead holder is initially moved radially inward out of range of the wheel flange, and then in the axial direction away from the wheel. The tire demounting apparatus also includes a stop which limits the pivoting motion of the tire bead holder on the actuating lever oriented opposite the demounting pivoting direction of the actuating lever.

Abstract: A center post key for a tire changing apparatus is provided. The center post key includes a retractable projection on its side for preventing inadvertent dislodging of the tire iron during operation of the apparatus.

Abstract: This invention relates to a method and machine for removing at least one layer of reinforcing elements from a breaker or belt of a rubber tire.According to the method of the invention for removing at least one layer of reinforcing elements, such as steel cords, etc. from a breaker or belt located between the tread area and the carcass of a rubber tire; the tread area of the tire is first removed down to the layer of reinforcing elements by rasping off this tread area, and afterwards each reinforcing element, for example each steel cord, of the layer to be removed is cut through in at least one place and the so cut reinforcing elements are removed by further rasping.This invention further relates to a machine for carrying out this method.

Abstract: An apparatus for grooving a tire which comprises a tire support shaft for rotatably supporting the tire and a support frame having a cutter device mounted thereon. The cutter device and the tire support shaft are movable relative to each other in a transverse direction parallel with the tire support shaft and perpendicular to the tire support shaft. The cutter is supportable at a desired angle with the tread surface, and the cutter blade is rotatable in the direction of the groove to be formed. The cutting position of the cutter is on the axis of an arm support shaft and is controllable by the combination of orthogonal coordinates to simplify the control program for the apparatus. When required, the cutter is swingably attached to a cutter holder to enable the cutter to cut the tire rubber and to be released therefrom with ease without the need to heat the cutter.