Abstract: To obtain a uniform initial cord tension in an auxiliary layer of a radial tire made up of a toroidal carcass, a belt, the auxiliary layer and a tread rubber, the belt is formed by winding inextensible cords around a drum with a radius of curvature substantially the same as that of a tire tread. Further, when the belt is formed by winding the cords around a flat drum, the auxiliary layer is formed on the belt by winding a heat-shrinkable cord around the belt in spiral fashion in such a way as to apply a higher tension at both the ends of the belt layer than at the center thereof. The radial tire thus manufacture is excellent in high-speed tire durability and tire uniformity, without causing belt separation trouble at high speed.
Abstract: Tire bead members (10) have radially superposed layers (11,12,13,14) of fibers (15) embedded in a polymeric matrix (16). Interposed between the layers (11,12,13,14) of composite material are thin layers (17,18,19) of a material that is not adhered to both of the adjacent layers (11,12;12,13;13,14) of composite material. Tires employing said bead members are also disclosed.
March 16, 1988
Date of Patent:
April 25, 1989
The Goodyear Tire & Rubber Company
Gurdev Orjela, Mahmoud C. Assaad, David B. Beltz, Amit Prakash
Abstract: A rubber article (A) has a design (12) outlined by a serrated portion including a plurality of ribs (22) which are separated by grooves (20). The ribs and grooves are located in a surface (10) of the article (A) and the design (12) is defined by a substantially flat ungrooved portion of the article surface. The ribs (22) extend no further outwardly than the article surface (10).
Abstract: A tire building method and apparatus applies a length of tred stock to a belt package or to a green tire carcass. The belt package or green tire carcass is mounted to a cylindrical building drum. The tread stock is then loaded outer face down onto an elongated, inclined servicer extending toward the drum. The stock is conveyed downwardly along the servicer to a delivery point located beneath the drum. The servicer is pivotally raised to bring the stock into contact with the materials on the drum, the stock at such point being directed to the drum to contact a lower portion of the drum along a line tangent to the periphery of the drum. During conveying of the stock along the servicer, the stock is retained in a centered position by engaging a groove or ridge formed along the outer side of the stock. Upon arrival of the stock beneath the drum, the drum is rotated, whereby the stock is adhered to the materials thereon and lifted away from the servicer onto the drum.
Abstract: The specification discloses an improved platen for a paper roll header. The platen has a two-piece face including an inner circular portion and an outer portion eccentrically surrounding the inner portion. The two face portions are independently heatable enabling the outer portion alone to be heated in certain applications to adhere a head to the periphery of a particular size roll.
Abstract: A pneumatic tire for motor vehicles has a low absorption of horse-power. The tire has an annular tread reinforcing structure disposed in the crown which comprises two layers of rubberized fabric with metallic cords having a diameter of not more than 0.603 mm embedded therein; the radial reciprocal distance between the centers of two facing cords in the radial direction on the cross-section of the tire is not over 1 mm.
Abstract: A composite structure is prepared in a mold using an elastic diaphragm which allows the application of a uniformly distributed pressure during a curing cycle. The elastic diaphragm seals a resin impregnated lay-up throughout the curing cycle during which the lay-up is heated and compressed, and ensures a constant resin-to-reinforcement ratio by preventing the escape of resin from the lay-up as the viscosity of the resin is lowered during the initial stages of the curing cycle. In instances where entrapped air or volatile removal from the lay-up is necessary, a separate step including the application of a vacuum and/or heat to the lay-up can be performed prior to the final curing cycle.
October 28, 1986
Date of Patent:
March 28, 1989
Aeritalia Saipa - Gruppo Velivoli da Trasporto
Fabrizio R. S. Turris, Salvatore Pagliuso
Abstract: A tread surface profile including a three-part configuration. A circumferentially extending, centrally disposed, linear or zigzagged rib has connected on both sides thereof a plurality of central blocks that are separated from the rib by shallow and narrow venting grooves. On both sides of the rib, pluralities of profiled blocks that extend from a tire shoulder toward the rib, with the profiled blocks being separated from the central blocks of the latter by longitudinal, circumferentially extending channels, and being separated from one another by lateral channels. The profiled blocks and the central blocks are arranged in S-shaped configurations that extend over the width of the tread surface in a diagonal fashion. The shoulder end of each profiled block is oriented axially at an angle of from 90.degree. to 80.degree. relative to the central tire plane, and each rib end of the central blocks is oriented circumferentially at an angle of from 35.degree. to 55.degree. relative to the central tire plane.
August 5, 1987
Date of Patent:
March 28, 1989
Uniroyal Englebert Reifen GmbH
Manfred Gerresheim, Jurgen Sommer, Dionysius J. Poque, Hans-Jugen Vogler
Abstract: To improve traveling stability, riding comfort, high-speed durability, etc., the uniformity in the main belt of a belted tire is improved by dividing an auxiliary layer into at least three areas in an axial direction of the tire, and both ends of the three divided auxiliary layers are bonded in the divided areas at different bonding positions, respectively, in circumferentially spaced relationship to each other. In particular, lateral force variation of the tire is reduced and separation trouble at the auxiliary layer bonding area can be settled.
Abstract: A process for recapping tires includes the steps of placing a tread strip around the circumference of a used tire casing with a bonding media interposed between the strip and casing; covering the treadstrip with a high termperature nylon film having a plurality of perforations substantially uniformly distributed across the surface of said film; covering the tread strip and film by an envelope having a negative embossment of tread design in registry with a positive tread design on said tread strip; and curing said tread strip and bonding media at a temperature of at least substantially 300.degree. F. The high temperature nylon film has a thickness in the order of 0.068-0.085-inches. A plurality of perforations are spread across the surface of said film. These perforations are in the order of 1/16-1/8-inch in diameter and are separated from each other by a distance in the order of approximately 3/4 to 11/4-inches.
Abstract: A heavy duty pneumatic radial tire for use in airplanes and the like is disclosed, which comprises a toroidal radial carcass, a belt superimposed about a crown region of the carcass, and a bead portion reinforcement comprised of a main chafer made from aromatic polyamide fiber cords, and an auxiliary chafer of at least two outer cord layers and at least two inner cord layers having a triangular truss structure defined by three cord layers among such four cord layers that the cords of the two outer cord layers are crossed with each other with respect to the meridional plane of the tire and the cords of the two inner cord layers are crossed with each other with respect to the meridional plane.
Abstract: A pneumatic tire having a decorative applique on the sidewall thereof. The applique is protected from damage when the sidewall is curbed by the provision of a rib concentric with the applique and interposed upon the sidewall between the applique and the tire tread. A decoupling groove interconnects the applique and the rib and allows the portion of the sidewall maintaining the applique to decouple from the remainder of the sidewall, deflecting inwardly when the sidewall makes contacting engagement with a vertical surface such as a curb. The deflection of the applique prevents contact with the curb and allows the rib to draw inwardly and over the outer edge of the applique, further protecting it from scuffing action. The decoupling groove may undercut the rib to be hidden from view. Further, a rib may be provided about the applique between the tire bead and applique to protect the applique in manufacture and handling.
Abstract: Disclosed is a belted tire for vehicles, which comprises a toroidally curved body of elastic material with a tread surface at the outer periphery and a peripherally extending annular belt construction which is embedded as an insert in the elastic material of the body in the region of the tread surface and which comprises two parts, namely a peripheral belt for peripheral stiffness and a transverse belt for transverse stiffness, wherein the peripheral belt has a number of annular strength supports which are arranged in laterally spaced juxtaposed relationship in at least one plane and which extend in the peripheral direction of the body, and the transverse belt has at least one transverse bracing strength support which extends approximately over the width of the tread surface and which is embedded in the elastic material in parallel relationship and at a spacing from the peripherally extending strength supports of the peripheral belt, and wherein the transverse belt is stretchable in the peripheral direction o
Abstract: A method for prevention wall indentations in a splice region of the tire carcass by joining two cut edges of the tire carcass and applying to the splice region a splice tape which overlaps the cut edges of the carcass.
Abstract: A pneumatic radial tire for airplanes comprises a carcass composed of plural organic fiber cord plies and a belt composed of a combination of cross belt layer structure and circumferential belt layer structure. The cross belt layer structure is comprised of at least two organic fiber cord layers, the cords of which layers being crossed with each other, and the circumferential belt layer structure is comprised of at least two organic fiber cord layers in such a manner that the number of cross belt layers is made larger at both side regions of the tread than at the central region thereof and the number of circumferential belt layers is made larger at the central region than at both side regions.
Abstract: A tread splicer (10) including two rows (60,64) of splicing blade assemblies (68) mounted with the blades (76) of one row (60) tilted toward and overlapping the blades (76) of the other row (64). Each of the blade assemblies (68) is operable independently to control the pressure applied to selected portions of the tread ends. Guide rollers (54,56,58) on the tread splicer (10) provide stitching of the tread (14) as well as positioning of the blades (76) relative to the tread (14) and tire building machine drum (18).
Abstract: A plasma processing method and an apparatus for carrying out the method in which a processing gas is introduced into a processing chamber, and periodically an amplitude modulated or frequency-modulated high-frequency voltage is applied to plasma generating means, to generate a discharge plasma and to carry out predetermined processing by the plasma.
Abstract: A heavy duty pneumatic radial tire for use under a high speed and a high internal pressure, is disclosed, which comprises a plurality of carcass cord layers of which cords are arranged at an angle from 90.degree. to 75.degree. with respect to a circumferential direction of the tire. The cords are composed of fibers of an aromatic polyamide having not less than 80 mole % of a repeating unit expressed by the following formula: --NH--Ar.sub.1 --NHCO--Ar.sub.2 --CO-- in which Ar.sub.1 and Ar.sub.2 denote at least one kind of an aromatic residue selected from: ##STR1## Elongation E.sub.n (%) of the aromatic polyamide fibers constituting the respective plies meets the following inequation:E.sub.n-1 +0.2.ltoreq.E.sub.n .ltoreq.E.sub.n-1 +2.0in which E.sub.n is an elongation (%) of the n-th layer of the carcass cord layers, provided that the carcass cord layers are taken as 1st ply, 2nd ply, 3rd ply, . . . , n-th ply from the inner liner side in which n is an integer of 2 or more, and E.sub.
Abstract: The invention concerns a tire, especially suited for motorcycles, that is capable of high performances during racing competitions, due to the high rigidity of the tire-sidewall which permits considerable increase in speed when cornering. The said tire presents, in correspondence of the radially inner portion of the sidewall and in a straight section, the profile of the carcass plies and of the axially inner surface, concave inwardly, together with the profile of the axially outer surface, concave outwardly.