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 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 tire is manufactured on standard tire building equipment and cured in standard curing presses. The tire tread has at least one deep circumferentially extending groove. Within the groove is a separately assembled ring. The ring may be fitted into the deep groove after vulcanization of the tire. For very wide tires, two grooves with two external rings may be used or more than two grooves and beads, depending upon the tire width.

Abstract: A tire building drum has a center section (720) and two end sections (722,724). Each end section is provided with an expandable bead lock assembly (726). The center section is preferably expandable. The expandable bead lock assembly comprises a carrier ring (CR) and a plurality of elongate links (K) extending between the carrier ring (CR) and a plurality of radially-expandable segments (S). When the carrier ring moves inward (towards the center section), the radially-expandable segments (S) move radially outward, urging a plurality of axially extending, circumferentially spaced-apart finger segments (F) outward from a collapsed position to an expanded position, and at least one position therebetween. In an embodiment of the invention, the bead lock assembly comprises a cylinder and two pistons (P1, P2) disposed within the cylinder. The pistons are free to move axially within the cylinder, in response to pneumatic pressure.

Abstract: An expandable tire building drum, having alternating fixed (226, 326, 426) and expanding (228, 328, 428) segments (e.g., 24 of each) in a center section (220, 320, 420) of the drum. The expanding segments are axially-extending and circumferentially spaced from one another, and are contoured (have recesses, or grooves) to accommodate tire components such as sidewall inserts. Two different mechanisms for expanding the center section are described. A first mechanism includes two wedge elements (358) which are axially moveable away from one another to expand the center section. Ramp elements (348) associated with the expanding segments (328) may thus be moved radially outward. Rubber bands (358) provide a restoring force for collapsing the center section. A second mechanism includes two guide rings (458) which are axially moveable towards one another for expanding the center section, and away from one another to collapse the center section.

Abstract: A false drum servers used in the manufacture of tires having a hollow cylindrical drum with a perforated surface on the drum through which air is drawn. The drawn air creating a suction surface for holding flat or sheet materials that are to be cut before transferring onto a tire building drum. When smaller pieces of flat materials are being held on the drum, the perforations that are not covered allow air to flow freely into the drum, thereby reducing the suction adhering effect of the perforated surface. The present invention provides methods and apparatus for varying the amount of perforated area through which air can be drawn into the drum, thereby changing the amount of suction adhering surface area of the perforated drum.

Abstract: A cutting segment for a False Drum (100,200,300) having a cylindrical outer surface (202,306) comprises a slot (204,224,330) extending generally axially from end-to-end of the cylindrical surface, a door panel (322) having substantially the same size and shape as the slot; and a mechanism (320) for opening and closing the door panel. The mechanism for selectively opening and closing the door panel includes an elongate lever (324), one end of which supports the door panel, the other end of which is pivotally attached to a stationary portion (point) of the drum, a spring (326) extending between an inner surface of the door panel and another stationary portion of the drum; and an inflatable pneumatic tube (328) disposed between the lever and yet another stationary portion of the drum. There is thereby provided a method of supporting material overlying the cutting slot of the False Drum, by opening the slot when cutting the material, and closing the slot when not cutting the material.

Abstract: A tire has a carcass reinforcement extending between a pair of opposing bead portion. At least one of the bead portions terminates axially to the outside by a tip and is intended to be mounted on a wheel rim having a bead seat that has an axially outer end closer to the axis of rotation than the axially inner end thereof. Within the bead portion are a bead ring and a bead apex. The radial carcass reinforcement ply is anchored in each bead portion and has at least one terminal end located in the bead portion. In the bead portion, the reinforcement ply passing radially inward of the bead ring, extending axially outward of the bead ring. The reinforcement ply terminates without passing back under the bead ring.

Abstract: Method and apparatus for precision alignment of a moving tire building drum to an automated tire building system working axis, wherein the automated tire building system comprises one or more work stations with application drums aligned to the working axis, and the tire building drum is moved into and out of each work station, comprising: supporting the tire building drum on a rigid, two-sided drum support frame having flat skates with flat bearing rollers under one side, and V-skates with V-mounted bearing rollers under the other side; providing a rail system comprising first and second approximately parallel rails passing through the one or more work stations, wherein the first rail is substantially flat-topped, and the second rail is substantially inverted V-shaped on top; causing the one or more flat skates to ride on the first rail, and causing the one or more V-skates to ride on the second rail; and positioning the drum support frame, the flat skates, and the V-skates relative to the tire building drum

Abstract: An expandable tire building drum, having alternating fixed (226, 326, 426) and expanding (228, 328, 428) segments (e.g., 24 of each) in a center section (220, 320, 420) of the drum. The expanding segments are axially-extending and circumferentially spaced from one another, and are contoured (have recesses, or grooves) to accommodate tire components such as sidewall inserts. Two different mechanisms for expanding the center section are described. A first mechanism includes two wedge elements (358) which are axially moveable away from one another to expand the center section. Ramp elements (348) associated with the expanding segments (328) may thus be moved radially outward. Rubber bands (358) provide a restoring force for collapsing the center section. A second mechanism includes two guide rings (458) which are axially moveable towards one another for expanding the center section, and away from one another to collapse the center section.

Abstract: A tire building drum has a center section (720) and two end sections (722,724). Each end section i s provided with an expandable bead lock assembly (726) . T he c enter s ection i s preferably expandable. The expandable bead lock assembly comprises a carrier ring (CR) and a plurality of elongate links (K) extending between the carrier ring (CR) and a plurality of radially-expandable segments (S). When the carrier ring moves inward (towards the center section), the radially-expandable segments (S) move radially outward, urging a plurality of axially extending, circumferentially spaced-apart finger segments (F) outward from a collapsed position to an expanded position, and at least one position therebetween. In an embodiment of the invention, the bead lock assembly comprises a cylinder and two pistons (P1, P2) disposed within the cylinder. The pistons are free to move axially within the cylinder, in response to pneumatic pressure.

Abstract: An expandable tire building drum, having alternating fixed (226, 326, 426) and expanding (228, 328, 428) segments (e.g., 24 of each) in a center section (220, 320, 420) of the drum. The expanding segments are axially-extending and circumferentially spaced from one another, and are contoured (have recesses, or grooves) to accommodate tire components such as sidewall inserts. Two different mechanisms for expanding the center section are described. A first mechanism includes two wedge elements (358) which are axially moveable away from one another to expand the center section. Ramp elements (348) associated with the expanding segments (328) may thus be moved radially outward. Rubber bands (358) provide a restoring force for collapsing the center section. A second mechanism includes two guide rings (458) which are axially moveable towards one another for expanding the center section, and away from one another to collapse the center section.

Abstract: Method and apparatus for making a tread-belt assembly for a pneumatic tire using a supply ramp to supply green rubber tread stock for application on a substantially cylindrical green rubber belt package; advancing the tread stock along the supply ramp toward the belt package; positioning at least a final portion of the supply ramp substantially along a plane tangent to an outer circumference of the belt package; and applying the tread stock to the outer circumference by moving a leading cut end of the tread stock from the supply ramp to the belt package along the plane tangent to the outer circumference. The green rubber tread stock is held from above for moving by inserting a plurality of transfer pins downward into both edges of the green rubber tread stock such that each transfer pin is angled toward a closest laterally outside edge.

Abstract: A method for simultaneously building a plurality of tire carcasses includes the tire building steps of establishing a sequence of work stations, each at a predefined location along a working axis extending through the work stations. Disconnected tire building drums are advanced along the working axis extending through the work stations. The tire building drums are coupled to an intake server at each of the work stations for operating the tire building drums. One or more tire components are applied to the tire building drums at each of the work stations.

Abstract: A tire building drum has a center section (720) and two end sections (722,724). Each end section is provided with an expandable bead lock assembly (726). The center section is preferably expandable. The expandable bead lock assembly comprises a carrier ring (CR) and a plurality of elongate links (K) extending between the carrier ring (CR) and a plurality of radially-expandable segments (S). When the carrier ring moves inward (towards the center section), the radially-expandable segments (S) move radially outward, urging a plurality of axially extending, circumferentially spaced-apart finger segments (F) outward from a collapsed position to an expanded position, and at least one position therebetween. In an embodiment of the invention, the bead lock assembly comprises a cylinder and two pistons (P1, P2) disposed within the cylinder. The pistons are free to move axially within the cylinder, in response to pneumatic pressure.

Abstract: A cutting segment for a False Drum (100,200,300) having a cylindrical outer surface (202,306) comprises a slot (204,224,330) extending generally axially from end-to-end of the cylindrical surface, a door panel (322) having substantially the same size and shape as the slot; and a mechanism (320) for opening and closing the door panel. The mechanism for selectively opening and closing the door panel includes an elongate lever (324), one end of which supports the door panel, the other end of which is pivotally attached to a stationary portion (point) of the drum, a spring (326) extending between an inner surface of the door panel and another stationary portion of the drum; and an inflatable pneumatic tube (328) disposed between the lever and yet another stationary portion of the drum. There is thereby provided a method of supporting material overlying the cutting slot of the False Drum, by opening the slot when cutting the material, and closing the slot when not cutting the material.

Abstract: A cutting segment for a False Drum (100,200,300) having a cylindrical outer surface (202,306) comprises a slot (204,224,330) extending generally axially from end-to-end of the cylindrical surface, a door panel (322) having substantially the same size and shape as the slot; and a mechanism (320) for opening and closing the door panel. The mechanism for selectively opening and closing the door panel includes an elongate lever (324), one end of which supports the door panel, the other end of which is pivotally attached to a stationary portion (point) of the drum, a spring (326) extending between an inner surface of the door panel and another stationary portion of the drum; and an inflatable pneumatic tube (328) disposed between the lever and yet another stationary portion of the drum. There is thereby provided a method of supporting material overlying the cutting slot of the False Drum, by opening the slot when cutting the material, and closing the slot when not cutting the material.

Abstract: A false drum servers used in the manufacture of tires having a hollow cylindrical drum with a perforated surface on the drum through which air is drawn. The drawn air creating a suction surface for holding flat or sheet materials that are to be cut before transferring onto a tire building drum. When smaller pieces of flat materials are being held on the drum, the perforations that are not covered allow air to flow freely into the drum, thereby reducing the suction adhering effect of the perforated surface. The present invention provides methods and apparatus for varying the amount of perforated area through which air can be drawn into the drum, thereby changing the amount of suction adhering surface area of the perforated drum.

Abstract: The disclosed bladder (10) is useful in ambient temperature fabrication of rubber parts and components. Due to the particular combination of construction materials used, the bladder has excellent release properties and results in improved manufacturing uniformity. At least one portion of the bladder (10) is formed from a lack tack, high abrasion resistant polyurethane. The polyurethane may comprise a ring-shaped portion (26) of the bladder surface or an entire end (20) of the bladder.

Abstract: A false drum servers used in the manufacture of tires having a hollow cylindrical drum with a perforated surface on the drum through which air is drawn. The drawn air creating a suction surface for holding flat or sheet materials that are to be cut before transferring onto a tire building drum. When smaller pieces of flat materials are being held on the drum, the perforations that are not covered allow air to flow freely into the drum, thereby reducing the suction adhering effect of the perforated surface. The present invention provides methods and apparatus for varying the amount of perforated area through which air can be drawn into the drum, thereby changing the amount of suction adhering surface area of the perforated drum.