Abstract: A device is disclosed for turning up the side walls of tyres on a shaping drum for shaping a tyre carcase, the spindle arrangement of which has a central spindle and at least two side spindles running in parallel, between which the central spindle extends, wherein the central spindle and the side spindles are drivable in a mutually independent manner and the core clamping devices are allocated to the central spindle and the turn-over devices are allocated to the side spindles or the turn-over devices are allocated to the central spindle and the core clamping devices are allocated to the side spindles.

Abstract: The device for assembling a green blank form of the crown of a tire comprises: a support having a shape that exhibits symmetry of revolution (4), —members (8) for shaping the green tire, and for each member, means (20, 35) for removable attachment to the support, comprising at least one bolt (20) and able to fix the member to the support as soon as the member (8) is in a reception position on the support. The bolt (20) has a face able to collaborate with at least one face of the member or of the support in order to place the member in the reception position, the faces being arranged so that the face of the member or of the support cannot move the bolt. The members, when they are in the reception position, are juxtaposed to form a reception surface for components that form the crown of the tire.

Abstract: The invention enables a built band (B) in a cylindrical shape to be easily and surely detached by peeling off the band (B) from being brought into close contact with a drum peripheral face in an expandable and contractable band building drum (D) constituted by two kinds of pluralities of segments (1a) (1b) arranged alternately in a peripheral direction, a diameter of one segment (1a) of two kinds of segments (1a) (1b) is contracted, thereafter, the segment (1a) is temporarily returned to a diameter expanding state, a diameter of other segment (1b) is contracted, thereby, the band (B) is peeled off from being brought into close contact with the drum outer peripheral face, thereafter, the band (B) is detached by bringing both of the segments (1a) (1b) into a diameter contracting state.

Abstract: A tire-building drum having a hollow main shaft and a swing arm rotatably positioned about the main shaft for moving the circumferential surface-defining segments of the drum between collapsed positions and fully-expanded positions as the swing arm is rotatably moved about the swing arm from a first angular position thereabout to a second angular position thereabout includes a mechanical assembly for acting between the swing arm and the main shaft so that upon rotation of the swing arm about the main shaft to its second position thereabout, the mechanical assembly biases the swing arm about the main shaft to continually urge the circumferential segments into the fully-expanded positions.

Abstract: An expandable deck comprises a plurality of elongated deck carriers mounted upon an expansion mechanism in a generally parallel and cylindrical formation. A fixed rod is mounted upon a first one of the deck carriers. A pivot rod is mounted upon an adjacent second deck carrier. A pivot segment defines a rotation aperture and a guide slot. The rotation aperture is rotatably mounted upon the pivot rod and the guide slot slidingly receives the fixed rod.

Abstract: The invention enables a built band (B) in a cylindrical shape to be easily and surely detached by peeling off the band (B) from being brought into close contact with a drum peripheral face in an expandable and contractable band building drum (D) constituted by two kinds of pluralities of segments (1a)(1b) arranged alternately in a peripheral direction, a diameter of one segment (1a) of two kinds of segments (1a)(1b) is contracted, thereafter, the segment (1a) is temporarily returned to a diameter expanding state, a diameter of other segment (1b) is contracted, thereby, the band (B) is peeled off from being brought into close contact with the drum outer peripheral face, thereafter, the band (B) is detached by bringing both of the segments (1a)(1b) into a diameter contracting state.

Abstract: A layup mandrel includes a shell having a tool surface on which plies may be laid up. The shape of the shell is changed by an actuator.

Abstract: Tire building drum and tire building method, capable of assembling tire component members with high accuracy. A tire building drum is used, which includes at least one core body, which is disposed at an axial inside of a pair of bead lock means, and which comprises a plurality of sheets of rigid support members disposed in a toroidal shape and adapted to be displaced and thereby expanded or contracted. Bead cores are locked by the bead lock means, respectively, and a center portion of a carcass band is bulged while displacing the bead lock means close to each other. Back side portions of the carcass band are folded to radial outsides around the bead cores, respectively. The core body is then radially expanded to the maximum diameter while locking the bead cores, and tire component members are assembled onto the radially expanded core body.

Abstract: Provided is a rubber member sticking device which prevents a sheet material held from becoming deformed and stretching during a separation operation, thus suppressing loss of energy and eliminating traces of vacuum holes. When an unvulcanized rubber sheet 12 is stuck, the unvulcanized rubber sheet 12 is supported by a separating surface 14A of a flat plate 14 and fitting surfaces 19A of a lifting member 16 without a difference in level being created therebetween. In this state, the unvulcanized rubber sheet 12 is in close contact with the fitting surfaces 19A of the lifting member 16. When the unvulcanized rubber sheet 12 is separated, a hydraulic jack 20 lowers the lifting member 16 to create a difference in level between the separating surface 14A of the flat plate 14 and the fitting surfaces 19A of the lifting member 16 so that the unvulcanized rubber sheet 12 is supported only by the separating surface 14A of the flat plate 14.

Abstract: There are provided a method and a drum for building a tire in which residual air can be effectively removed by enhancing a pressing force of a carcass band to a bead filler in the turning of the carcass band around a bead core, wherein a cylindrical green case is arranged on an outer peripheral side of a building drum, and a central portion of the green case is expansion-deformed in a radial direction while approaching both the bead cores to each other under a restraint of the bead core through the building drum, and the green case is pressed onto an inner peripheral face of a belt-tread band, and thereafter both the end portions of the carcass band are turned around the bead cores so that the carcass band is pushed onto rigid support members disposed at an inner peripheral side of the carcass band together with the bead cores and bead fillers.

Abstract: A tire building drum and a method of building a tire carcass is disclosed. The tire building drum has a center section comprised of a plurality of segments that are radially and axially movable. The building drum further comprises shoulder sections that are axially movable. The shoulder sections include radially expandable bead locks. The method employs the steps of applying one or more carcass layers, locking the bead locks and moving the center section radially outwardly while moving the bead locks axially inwardly.

Abstract: A shaping drum for tire carcasses includes a barrel (5), comprising two systems for holding the beads (7, 8) of a carcass (2) to be shaped carried by the barrel, and a receiving surface (30) for the tire carcass which is formed by the outer surfaces (310) of a plurality plates (31) which are mounted on the barrel (5) and arranged circumferentially around the central axis of the barrel (5). The plates (31) are radially displaceable between a retracted position and an expanded position of the drum (1). Guide structure (43) on the inner side of each plate (31) bears on an adjacent plate, permitting the positioning of each plate at the same radial level in the expanded position of the drum and permitting the tilting of each plate about an axis parallel to the central axis such that the plates are circumferentially superimposed in the retracted position of the drum (1).

Abstract: A tire building drum includes a hollow main shaft, a pair of bead lock sections arranged concentric with the main shaft and respectively holding a bead core of a tire, and a radially expansible/contractible carcass-supporting body defining an inner shape of a carcass member extending between the bead cores. The carcass-supporting body is composed of a pair of core bodies which are concentric with the main shaft and have a plurality of expansible/contractible rigid segments circumferentially abutting on and engaging with each other. The tire building drum is provided with a pair of sliders on which the core body and the bead lock section are mounted on a single side in the axial direction, slider-moving means for moving these sliders to any required radial position and segment-expanding/contracting means for expanding/contacting the segments of each core body to any required radial position.

Abstract: A shaping drum for tire carcasses includes a barrel (5), comprising two systems for holding the beads (7, 8) of a carcass (2) to be shaped carried by the barrel, and a receiving surface (30) for the tire carcass which is formed by the outer surfaces (310) of a plurality plates (31) which are mounted on the barrel (5) and arranged circumferentially around the central axis of the barrel (5). The plates (31) are radially displaceable between a retracted position and an expanded position of the drum (1). Guide structure (43) on the inner side of each plate (31) bears on an adjacent plate, permitting the positioning of each plate at the same radial level in the expanded position of the drum and permitting the tilting of each plate about an axis parallel to the central axis such that the plates are circumferentially superimposed in the retracted position of the drum (1).

Abstract: A unistage drum (1) for building tires (2) , the drum (1) having two half-drums (13), each of which has a ring of sectors (43a) movable by a first actuator (37, 46) to and from an expanded position to clamp a respective bead (7); each sector (43a) being defined by a first and a second block (49, 50) defined externally by respective cylindrical surfaces (55a, 55) and having respective mutually-contacting inclined surfaces (52, 53); and the second block (50) sliding on the first (49), by virtue of a second actuator (33, 37), to and from an outer position in which the second block (50) defines a relative portion of an annular shoulder (56) located, in use, between the two beads (7) and in a position adjacent to one of the beads (7).

Abstract: A rotatable drum (10) for use in the manufacture of vehicle tires, the drum including a plurality of segments which collectively define an outer circumference (32) of the drum. The segments are divided into first and second end portions (15,17) which are individually mounted for axial and radial movement between expanded and retracted positions relative to the rotational axis (16) of the drum.

Abstract: A belt and tread drum having an annular shell comprising a plurality of circumferentially spaced segments, each of which is mounted on a carrier which disposed in circumscribing relationship to a generally cylindrical actuator rotatably connected with a reciprocating piston disposed within a cavity defined between the actuator and a hub fixed to a central core of the drum. Translational movement of the piston between extended and retracted positions in a direction parallel to the rotational axis of the drum is converted into selected rotational movement of the actuator relative to the hub. A plurality of sets of links interposed between the segments and the actuator and hub have their first ends commonly pivotally pinned to a segment. The second end of one link of each set of links is pivotally pinned to the actuator and the second end of the other link of each set of links is pivotally pinned to the hub.

Abstract: A drum is provided for building of a tire. The drum includes a central sh supporting two plates mounted axially and sliding thereon and a plurality of rods are articulably mounted on each plate. The rods of each plate are covered by a sleeve and a membrane is connected to each of the sleeves. A mantle covers the assembly to provide a surface on which the tire is progressively constructed. A process for assembling a tire with the drum is also disclosed.

Abstract: Apparatus including a frame, preferably circular in geometry and having a cental axis. At spaced apart locations about the circumference of the frame there are provided a plurality of links, each of which is pivotally mounted on a the frame and each of which carries a shoe having an arcuate surface. Each link includes at least one leg portion having an outboard end, The outboard ends of the leg portions of the plurality of links are interconnected with one another and with a drive mechansim whose operation serves to rotate the interconnected links in unison about their respective rotational mountings to the frame. As the links are rotated, their respective shoes are caused to move along an arcuate path which repositions the shoes generally radially inwardly or outwardly with respect to the central axis of the apparatus. To retain the circularity of the arcuate surfaces of the shoes as they are moved radially inwardly and outwardly, the shoes are interconnected by respective rigid rods.

Abstract: Apparatus defining an outer circumference suitable to serve as a forming surface or an inner circumference suitable to serve as a circumference-engaging surface. The apparatus is particularly useful in the forming of the belt and tread package of a vehicle tire or as a transfer ring for grasping a belt and tread package of a vehicle tire. The apparatus includes a plurality of multi-sectioned segments of arcuate cross-section which collectively define the cylindrical surface of the apparatus and which are supported for movement radially of the longitudinal axis of the apparatus for adjustment of the circumference of the cylindrical surface. Each segment includes an intermediate section and two side sections hingedly connected to the intermediate section. The segments also include guide plates which cooperate with a side section of an adjacent segment so that movement of each segment radially of the drum effects a corresponding hinged movement of a side section of an adjacent arcuate segment.

Abstract: A belt and tread drum for use in the manufacture of vehicle tires and having a plurality of circumference-defining segments whose radial position is determined by a camming means. The extent of movement of the camming means is selectable by stop means associated with a central shaft which serves to mount the camming means and the stop means. Visual indication of the selected circumference of the drum is provided.

Abstract: An inner supporting unit (1) for toroidal carcasses (2), wherein a number of ring segments (23) define a first annular supporting element (24) for the intermediate annular portion (6) of the carcass (2); and two rings (25, 26) of supporting members (27) are selectively operable for supporting the beads (4) of the carcass. The segments (23) define a first (48) and second (49) number of segments (23) movable between an operating position wherein the two numbers (48, 49) of segments (23) define the first annular supporting element (24), and an idle position wherein the two numbers (48, 49) of segments (23) respectively define a second (52) and third (53) substantially annular element aligned with each other along an axis (9), the outside diameter of which is smaller than the inside diameter of the beads (4).

Abstract: A bead lock drum for use in the manufacture of vehicle tires and including multiple carriages disposed about a central shaft and carrying a plurality of circumference-defining segments, the carriages and segments being separable about a transverse plane of the drum for removal and insertion of spacers between adjacent aligned segments and suitable to alter the width dimension of the drum and permit the use of a single drum for making various width tires of a given rim size.

Abstract: A tire building drum having a plurality of alternating wide and narrow drum segments bearing shells matable to form a cylindrical tire-building surface includes a shaft and concentric hub rotatable relative one another to expand and collapse the drum. In a preferred embodiment, blocks coupled to each respective segment via springs are mounted for bidirectional radial movement in rotationally-fixed relation to the shaft. Links nestable when the drum is collapsed connect the blocks with the hub to drive the blocks radially and function as over-center toggles stabilizing the drum when expanded. Variable-engagement slides associated with the blocks most effectively resist non-radial forces exerted by the links when their relative magnitude is greatest. Dimensional stability and precision of the drum are facilitated by radial and angular stops which are not subject to sliding wear.

Abstract: A tire building apparatus having a novel pneumatic actuator for radially moving a plurality of arcuate drum segments between an expanded, building position and a collapsed, removal position is disclosed. The pneumatic actuator comprises a piston fixedly mounted on a shaft and a reciprocally movable cylinder mounted on the piston. An annular primary chamber is defined around the shaft on one side of the piston by one end wall of the cylinder. The actuator also includes an annular pressure accumulating tank provided on the shaft on the other side of the piston. An annular secondary chamber is defined around the tank by the other end wall of the cylinder. The secondary chamber is in communication with the pressure accumulating tank through an opening built in the tank. A check valve is provided in the piston to permit air flow from the primary to secondary chamber. The cylinder is drivingly connected with the plurality of drum segments through mechanical links.

Abstract: A tire building apparatus includes a former made of a plurality of segment units arranged in a circumference, an inner shaft extending through the former, an outer shaft and a sleeve mounted on the inner shaft, the outer shaft and the sleeve carrying a right guide mechanism, a left guide mechanism, a right slider, and a left slider respectively, a right link mechanism, and left link mechanism provided between the right slider and the right guide mechanism, a left link mechanism provided between the left slider and the left guide mechanism. Another tire building apparatus includes a former made of a plurality of segment units arranged having a center segment, a right side segment, and a left side segment, and a right moving device for moving the right side segment in axial and radial directions, a left moving device for moving the left side segment in axial and radial directions, and a center segment support device for supporting the center segment with radially inward biasing.

Abstract: A band winding apparatus for forming a bead core comprises a winding device which is composed of a drum and holding means. The drum is rotatably supported by a support shaft and has a peripheral surface on which a band for forming a bead core is wound. The holding means are installed in the drum and has a holding surface capable of detachably adsorbing a start end of the band outside in the drum's radial direction. The holding surface is arranged approximately flush with the peripheral surface of the drum.

Abstract: A tire forming drum includes a pair of bead lock devices, a shaping device, ply turning-up devices for turning up a ply, and a plurality of stitching supports circumferentially arranged between the pair of bead lock devices. Each of the stitching supports is composed of a rigid lever having one end pivotally connected to a housing of one of the bead lock device and the other end provided with a close contact portion to be brought into close contact with an inner circumferential surface of one bead portion of a tire being formed. An actuating device for each of the stitching supports is composed of a rigid link having one end pivotally connected to a mid portion of the stitching support and the other end pivotally connected to one of sleeves movable in axial directions of the forming drum. The stitching supports are able to expand by movements of the sleeves and the bead lock devices arranged on both sides toward each other.

Abstract: A tire building apparatus includes a main hollow shaft, a rotatable screw shaft inserted in the main shaft, a pair of slider units axially movably supported so that upon rotating the screw shaft the slider units move through equal distances toward and away from each other, a pair of support member assemblies expansibly and contractibly supported by the slider units for supporting the bead portions of the green case on radially insides by the support member assemblies when expanded to increase their diameters, a pair of movable blocks axially movably supported to be able to abut against the slider units, a drum core in the form of a ring to surround the main shaft between the slider units, a link mechanism connecting the drum core and the movable blocks for expanding the drum core when the movable blocks move axially inwardly toward each other and contracting the drum core when the movable blocks move axially outwardly away from each other, a pair of stoppers for limiting axially outward movement of the movabl

Abstract: A method and apparatus for producing a green tire on a curving apparatus that includes a fixing head system having two rotatable and axially movable, one-piece bead-holding disks are provided. The bead-holding disks are swiveled about an axis perpendicular to their axis of rotation. The essentially cylindrical carcass member is disposed on the bead-holding disks concentric to their axis of rotation. The bead-holding disks are subsequently swiveled back into a position vertical to their axis of rotation. After the carcass is fixed on the disks, it is curved into a belt unit.

Abstract: A segmental drum (1) has a plurality of circumferentially spaced drum segments (28) radially movable by a set of links (36) pivotally connected to a pair of axially movable hub assemblies (34) slidably mounted on a drum shaft (12). Each of the segments (28) has a cylindrical center portion (30) and end portions (32) with recesses providing pockets (68) for the tire bead portions. The links (36) are positioned between the end portions (32) providing space for large bead portions in the pockets (68) and at the same time the segments (28) are retractable to a small diameter to facilitate placing of a tire band (64) over the drum (10).

Abstract: A tire building drum (10) has a plurality of expandable axially extending, circumferentially spaced-apart segments (18) with an elastic cover sleeve (48). The radius (C) of the radially inner surface (50) of the cover sleeve (48) is greater than the radius (B) of the radially outer surface (20) of the segments (18) in the contracted condition of the drum (10) for placing the cover sleeve (48) over the segments (18) and is less than the radius (A) of the radially outer surface (20) of the segments (18) in the expanded condition of the drum (10) for gripping the segments (18) and maintaining a precise position of the cover sleeve (48). The segments have replaceable cover plates (38) of different thicknesses which are easily interchangeable to provide different drum components for different size tires.

Abstract: A device for producing annular-shaped articles comprises a hub (4) and a cylinder-shaped body (1) made up of sectors (2 and 3), of which the sectors (2) are rigidly coupled to the hub (4), while the other sectors (3) are traversable with respect to the hub, a pusher (6) being axially arranged in the hub (4) and adapted to interact, while axially moving, through its ends extending towards the other sectors (3), with stops (8) secured on the other sectors (3) for traversing the latter with respect to the hub (4). The stops (8) are held to the other sectors (3) at angles (.alpha.) less than 90 degrees with the direction of movement performed by the pusher (6) when the other sectors (3) are being brought together.

Abstract: An apparatus and method for applying a bead filler material to a bead wherein the bead filler material may be applied to the bead at an offset position to compensate for the stretching of the filler material as it is applied to the bead to afford a proper splice of the leading and trailing ends of the bead filler material.

Abstract: The build-up drum of build-up machines is frequently interchangeably mounted on its drive shaft in order to be able to adapt to changes in dimension in the production program with one and the same machine. If the operating and control elements associated with the drum bear directly against the end walls of the drum, each change of the drum requires considerable expense for adjustments and alignments. This is avoided by providing the build-up drum on both sides with a respective spacer and abutment sleeve against which the movable operating and control elements can bear in a constantly uniform orientation relative to the middle of the drum as the critical reference plane.

Abstract: A radial collapse tire building drum having a hub, a plurality of axially extending cylindrical body segments disposed around the hub, a first radial support at one axial end of the hub and supporting one axial end of the segments, a second radial support at the other axial end of the hub and supporting the other axial ends of the segments, and a collapsing mechanism disposed within the drum between the first and second radial supports and operable to move the segments either radially outwardly with respect to the hub to form a cylindrical body concentric with the hub, or radially inwardly towards the hub to collapse the cylindrical body of the drum. A main drive shaft is secured to the hub with its axis co-extensive with the hub axis and there is a hollow shaft through which the main drive shaft extends.

Abstract: A simple two-stage process is disclosed for economic mass production of premium-quality heavy-duty belted tubeless and tube-type radial truck tires of various sizes using standard 30-year-old semi-automatic tire building machines heretofore used in the manufacture of bias-ply tires by the flat-band process. The old automatic machines are modified at minimal cost to receive a unique rigid expansible drum which is radially expanded 35% or more during the first-stage tire building operation. The drum may be adjusted to make tires of various widths and diameters and has a series of closely spaced radially movable segments defining a rigid segmental open-ended externally cylindrical shell having an annular rubber cover on which a complete green tire carcass is built prior to application of the belts and the tread at the second-stage machine.The shell has rigid beveled shoulders at the ends of the drum which are inclined at an angle of from 40.degree. to 50.degree.

Abstract: An adjustable tire building drum is disclosed for use during strip winding of OTR tire treads having nine replaceable segments with interfitting fingers extending circumferentially to define a rigid generally cylindrical shell whose diameter and axial length may readily be adjusted for a wide variety of different tire sizes. A unique precision actuating mechanism is provided for adjusting the segments radially including a heavy cantilever link and an associated stabilizing arm for each segment which maintains rigidity even when the segmental shell is expanded 90 to 100 percent.

Abstract: The tire building apparatus was an axially elongated drive shaft which is rotatable about its center axis. The tire building drum of the apparatus includes an axially elongated retainer sleeve which is interchangeably received on the drive shaft and rotatable with the drive shaft about the center axis of the drive shaft. A slider sleeve is slidably received on the retainer sleeve and is rotatable with the drive shaft about the center axis of the drive shaft. A plurality of link members are provided each being pivotally connected at its one end to the slider sleeve. A plurality of arcuate drum segments are provided each being equiangularly spaced apart from one another about the center axis of the axially elongated drive shaft and pivotally connected with the other end of each of the link member.

Abstract: A tire molding apparatus having a hollow rotary shaft, a plurality of first drum segments are arranged substantially in the form of a cylinder around the front end portion of said rotary shaft. The second drum segments are paried with the first drum segments, thus forming a molding drum. A diameter changing mechanism is provided between the rotary shaft and the first and second drum segments for transmitting rotation of said rotary shaft to the first and second drum segments and additionally for moving the first and second drum segments radially. A plurality of threaded shafts, each having both end portions threaded in the opposite directions, are screwed respectively into the first and second drum segments thus paired. Rotation of the threaded shafts causes the first and second drum segments to move towards each other or to move away from each other to change the width of the molding drum.

Abstract: For folding an annular resilient band about a circumferential fold line, the band is first wrapped on a generally cylindrical, radially collapsible drum structure having a cylindrical external contour about the center axis of the drum and an annular zone radially inward of the contour with an inflatable annular first bladder positioned in such a manner as to have a folded-over axial end portion axially protruding into the aforesaid annular zone and with an inflatable annular second bladder positioned radially inwardly of the first bladder and in such a manner that the first and second bladders have axial portions overlapping each other, whereupon the first bladder is inflated to a medium expanded state so that an axial end portion of the band on the drum structure is contacted by the bladder and displaced radially outwardly and thereafter the first bladder is moved axially away from the drum structure for forming an annular gap between the first bladder and the axial end portion of the band, the second bladde

Abstract: A collapsible tire building drum having a collapsible central cylindrical portion composed of a plurality of drum segments. The outer laterally spaced edges of the drum segments are grooved for connecting annular rings to the respective edges. Each of the annular rings is composed of a plurality of arcuate segments whose profile is the same at the juncture with the drum segments but tapers radially outwardly and upwardly and then curves downwardly and inwardly to provide an off-set under cut portion.

Abstract: A tire building machine including a building drum for receiving a belt-tread assembly and a pair of coaxial shafts having disc members freely rotatable thereon for receiving and supporting a tire carcass. The disc members and shafts are pivotally movable as a unit and the disc members are also movable with respect to one another for engaging annular beads formed on said carcass to effect a seal therewith and permit the introduction of air to inflate said carcass to assume a toroidal shape. A radially expansible and contractable transfer ring, that is axially movable, engages the belt-tread assembly and transfers same from the drum to the carcass prior to the pivoting of the carcass, belts and tread stock into engagement with a rotatably driven stitcher apparatus.

Abstract: An apparatus for tire transportation in a tire-forming machine is described. The apparatus comprises a pair of circular plates attached to transfer means adapted to move in the axial direction of a tire-forming drum. A plurality of rotatable shafts are provided at substantially equal intervals in the circumferential direction on said circular plates and positioned on a circle concentric with said circular plates. To these shafts are attached levers having holding members for green tire or an intermediate assembly body for green tire and angular levers, said angular levers being connected together by means of linking members combined together through pins so as to form a number of parallelogram links of mutually cooperative movement and at least a driving means being provided for swinging said angular levers.

Abstract: The present drum can find application mainly for assembling large-size tire casings.The drum comprises sectors with shoulders provided with a drive for their radial movement. The drive incorporates slide-blocks arranged concentrically with each other on a shaft axially movable therealong. The slide-blocks are articulated, through levers, with the sectors. The midpoint of one of the levers of each slide-block is articulated with the shaft through the link which is half as long as the lever.The shoulders are provided with a mechanism for their relative movement with respect to the sector. The mechanism is made as a cam associated with the lever of radial movement drive of the sector. The cam is adapted to engage one of the toothed segments articulated to the sector. The toothed segments are kinematically associated with each other and are in mesh with the respective toothed racks connected to the shoulders, so that the toothed segment engages the cam through the agency of a pin provided on the cam.

Abstract: A tire building machine including a building drum for receiving a belt-tread assembly and a pair of coaxial shafts having disc members freely rotatable thereon for receiving and supporting a tire carcass. The disc members and shafts are pivotally movable as a unit and the disc members are also movable with respect to one another for engaging annular beads formed on said carcass to effect a seal therewith and permit the introduction of air to inflate said carcass to assume a toroidal shape. A radially expansible and contractable transfer ring, that is axially movable, engages the belt-tread assembly and transfers same from the drum to the carcass prior to the pivoting of the carcass, belts and tread stock into engagement with a rotatably driven stitcher apparatus.

Abstract: A tire building apparatus having two end drums disposed on respective opposite sides of an intermediate drum, with the intermediate drum embodying a perforated sleeve for supporting the portion of a tire carcass to be disposed between the beads of a completed tire and for permitting air to flow therethrough into direct contact with the aforementioned tire carcass for pneumatically expanding the latter, and with the end drums carrying bead lock clamping members and ply turn-up bags that are movable inwardly toward the longitudinal center of the apparatus during the aforementioned expanding of the tire carcass, the bags being of dual-compartment construction, having inner compartments for effecting ply turn-up operations at air pressures greater than the air pressure for expanding and supporting the tire carcass, and outer compartments for effecting additional sidewall-applying operations at internal air pressure less than the pressures in the inner compartments, and with the components of the intermediate drum

Abstract: Herein disclosed is a tire building drum which is constructed expansible in diameter and stretchable in width.

Abstract: The tire-building drum comprises alternate drum sectors with fixedly and movably mounted shoulders and mechanisms for moving said drum sectors. Each of these mechanisms consists of two parts having annular slides, which are connected to a screw drive, and levers, which are articulated to the drum sectors and the slides and which have toothed sectors arranged in constant mesh with each other for the purpose of inter-connecting the parts in each of the mechanisms for moving the drum sectors. The slides are mounted coaxially on the drum hub and are adapted to move together and separately in mutually opposite directions. This enables the drum sectors to move only radially and decreases the axial dimensions of the drum.

Abstract: A winding drum for producing belt inserts for pneumatic tires has a casing the diameter of which is variable. A characteristic feature of the drum is that its cylindrical casing at its radially inwardly located edges is changed--looking in cross-section--into V-shaped disks which are inwardly bent. These disks and the casing consist of polyurethane with an E-modulum of about 800. The edges of the disks are fixed air tightly in a drum. Supports adjustable radially in an axial direction lie against the V-shaped bent sections of the disks.