Abstract: A pnuematic tire having a cap tread and a base tread is defined in way of material as follows:(1) said cap tread is made of a rubber material in which 100 pts. wt. of rubber component comprising at least 50 pts. wt. of natural rubber and/or polyisoprene rubber, at most 50 pts. wt. of polybutadiene rubber containing at most 20% of 1,2-bonding units and at most 50 pts. wt. of styrene-butadiene copolymer rubber containing at most 30 wt % of bonded styrene is incorporated with 50 to 100 pts. wt. of carbon black and with a softener in an amount satisfying the inequality;1.1X-44<y<1.1X-30,where y is the total amount of the softener in pts. Wt.; x is the amount of carbon black in pts. wt.; and an overall solubility parameter of the softener is in the range of from 8.0 to 9.0,(2) said base tread is made of a rubber material in which 100 pts. wt. of rubber component comprising at least 60 pts. wt. of natural rubber and/or polyisoprene rubber, at most 40 pts. wt.

Abstract: The process for thermally bonding plastics is capable of bonding two tubings over a very small circumferential overlap area and the bond formed thereby, is able to withstand high peel and shear forces. The method includes the steps of: providing a stepped mandrel having a smaller diameter portion and a larger diameter portion; sliding a first tubing over the smaller portion; sliding a second tubing over the larger portion and slightly over the first tubing to establish an overlapping area to be bonded; sliding a shrink tubing over the second tubing to a position over the overlapping area; placing the overlapping area in a die; and heating the die a sufficient amount for a sufficient time to cause bonding of the first tubing to the second tubing. Preferably, the first tubing is made of a substantially non-crosslinked olefin and the second tubing is made of a highly crosslinked (heat shrink) polyolefin.

Abstract: A pneumatic radial tire for heavy load is provided in which a tread design formed on the tread portion is divided into a tread part Ab with larger ground contact area ratio and a tread part Aa with smaller ground contact area ratio with the tread equator plane as a boundary, the ratio Sa/Sb of a ground contact area ratio Sa of the tread part Aa to a ground contact area ratio Sb of the tread part Ab is set in a range of 0.71 through 0.89, and the tread part Aa with smaller ground contact area ratio is located on the inner side of a vehicle when the tire is mounted thereon. Whereby, abnormal wears, such as one-sided wear or shoulder wear, occurred in the tread portion of the tire mounted to, particularly, a steering wheel can be alleviated so as to improve wear resistance of the tread portion and hence to prolong the service life of the tire remarkably.

Abstract: Stretched elastic strands and a continuous sheet are fed concurrently toward a diaper assembly station on the way to which quick setting adhesive is applied periodically to zones in one and slower setting adhesive is applied alternately periodically zones in the other. Diapers assembled as a continuous web at the station are ultimately severed at which time the quick setting adhesive zones are set already and impart elasticity to the crotch region of the diapers. The zones on the strands that are tentatively adhered to the sheet with slow setting adhesive contract gradually into the diaper along the straight adhesive lines and then they set.

Abstract: Disclosed herein is a heavy duty pneumatic radial tire in which a tread portion of the tire is reinforced by superimposing a belt composed of plural rubberized cord layers upon the outer periphery of a radial structure carcass composed of one or more rubberized cord layers containing cords each arranged in a radial plane of the tire or in a plane deviating at a small angle therefrom; the belt has a substantially lower flexural rigidity at central region than at side regions; and the tread portion has such a tread pattern that has a substantially higher negative ratio at central region than at side regions.

Abstract: A pneumatic tire (10) having a tread portion (11) including a continuous mid-circumferential rib (28), and primary grooves (22,23) on each side of said rib that form an "S" or "Z" shaped configuration diagonally across the tread portion. A plurality of blades (30) are arranged to extend in circumferentially spaced blade paths (34) across the tread. The blade paths (34) extend substantially continuously between the tread edges (12,13) in a diagonally opposite direction to the primary grooves (22,23) such that each primary groove is intersected by a plurality of blade paths.

Abstract: A method of manufacturing heat exchange mat comprises a first heating step of a mat member for semi-gelatinizing a pasty resin adhesive in said mat member as interposed between a surface sheet and a textile insert on both surfaces of a hollow member including a heat exchanging element of the mat member so as to preliminarily bonding said sheet and insert, and a second heating step for securing a seal member to the peripheral edges of the mat member and simultaneously fully gelatinizing said resin adhesive, whereby the required manufacturing time can be shortened to a large extent.

Abstract: A filament winding machine suitable for winding a hollow closed fibre-reinforced body such as a radome comprises a rotateable former 1, an annular spider 3 supporting a plurality of asymmetrically spaced filament guides 19 movable so as to be able to traverse the length of the former to a position beyond the closed end thereof, and an array of circumferentially spaced spigots 26 at or near the closed end of the body to retain laid fibres such that there is no slippage of fibres as they are laid over the closed end of the body.

Abstract: A pneumatic radial ply tire in which the body ply is formed of a low twist yarn having between three and six turns-per-inch. The body ply terminates in relatively low turn-up ends extending along the side walls a distance between 10% and 30% of the tire section height and out of the area of cyclic stress and oscillation in the side walls of the tire. A relatively high, wide and hard bead filler is located within a bead portion of the tire and has a height between 20% and 50% of the tire section height with a width of between 15% and 35% of the bead filler height. The bead filler has a hardness of between 75 and 98 on the Shore A scale. The ply yarn preferably is polyester and the individual low twist strands are arranged in a parallel relationship and is preferably free of transverse cross strands known as wefts or picks. The combination of low twist yarn, low turn-up body ply ends and bead filler size and hardness provides a tire having increased durability and uniformity at a lower cost.

Abstract: The tire comprises a tread with central grooves between exterior grooves. Both types of grooves extend in a zig-zag shape in the circumferential direction and define ribs between them. Each one of the central grooves is bounded by sidewalls which define two opposite sidewall sections between angled regions of the central grooves. The two sidewall sections alternate from one angled region to the other in the circumferential direction of the tread. A first sidewall section of the two opposite sidewall sections extends at least approximately normally to the tread and a second sidewall section of the two sidewall sections comprises two sidewall portions extending substantially normally to the tread and an interconnecting flank portion therebetween which extends at an inclination in the range of 20.degree. to 60.degree. with respect to a line perpendicular to the tread.

Abstract: A low cost process of making composite products from sugar containing lignocellulosic materials, such as sugarcane bagasse and stalks of sorghum, corn, sunflower, flax, and the like, utilizing the residual sugars as bonding and bulking agent: Comminuted sugar containing lignocellulosic material wholly composed of or partially in combination with other lignocellulosic materials, in the absence of adhesive binders or bonding agents, is molded at a temperature of at least 180.degree. C., and a pressure and for a time sufficient to compound the material into a composite product. The free sugars in lignocellulosic materials act as a thermosetting adhesive binder, and provide both bonding and bulking effect. The composite thus produces possess great strength and excellent dimensional stability. These results are obtained to the greatest extent when the lignocellulosic materials contain higher proportion of sugars.

Abstract: A pneumatic radial ply tire in which the body ply is formed of a low twist yarn having between two and five turns-per-inch. The body ply terminates in relatively high turn-up ends extending along the side walls a distance between 35% and 65% of the tire section height and out of the area of cyclic stress and oscillation in the side walls of the tire. A relatively high, narrow and hard bead filler is located within a bead portion of the tire and has a height between 20% and 50% of the tire section height with a width of between 5% and 25% of the bead filler height. The bead filler has a hardness of between 75 and 98 on the Shore A scale. The ply yarn preferably is Nylon and the individual low twist strands are arranged in a parallel relationship and is preferably free of transverse cross strands known as wefts or picks. The combination of low twist yarn, high turn-up body ply ends and bead filler size and hardness provides a tire having increased durability and uniformity at a lower cost.

Abstract: The procedure for manufacturing thin profiled strips, made up of continuous unidirectional fibers embedded in a thermoplastic resin, consists of impregnating a lap (1) of parallel fibers with resin particles, achieving resin fusion, forming the profiled strip and of cooling the latter.The lap (1) of fibers is dipped into a bath (26) of resin particles, mechanically impregnated with the particles, by feeding it for instance around rollers (15, 16, 17) immersed in the resin particles and the excess particles are removed to obtain the desired resin to fiber content ratio.Use of profiled strips obtained, in particular for outwardly reinforcing tubes or for producing moulded items.

Abstract: The invention pertains to the method and apparatus for vulcanizing retreaded tires wherein an annular precured tread is bonded to a tire carcass by bonding material interposed between the tread and carcass. Grills are attached to the opposite sides of the carcass and each are associated with an annular elastomeric ironing member having a concave surface corresponding to the tire side configuration engaging the tread marginal edges whereby the ironing surface shapes and smooths the transition zone between the tread and tire carcass resulting in improved appearance and integral bonding.

Abstract: A belt construction and method of making the same are provided, the belt construction having opposed sides and comprising a tensile unit intermediate the opposed sides, a plurality of teeth defining one of the opposed sides of the belt construction and being mainly formed of a first polymeric material that has reinforcing fibers therein, each tooth having opposed sides that are disposed in spaced relation to adjacent sides of adjacent teeth, the belt construction having a land area between adjacent teeth, and a backing member defining the other of the opposed sides of the belt construction, the backing member being mainly formed from a second polymeric material that is initially separate from the material of the teeth.

Abstract: A pneumatic tire suitable for running on snow and ice roads is improved by providing tread portion composed of a rubber composition comprising 100 parts by weight of a blend rubber consisting of (A) 50 to 90 parts by weight of at least one rubber selected from the group consisting of natural rubber, polyisoprene rubber, butadiene-styrene copolymer rubber, polybutadiene rubber, butyl rubber and halogenated butyl rubber and (B) 10 to 50 parts by weight of a diene type rubber containing 0 to 25% of styrene group (x) and 0 to 50% of 1,2 vinyl bond group (y), (x) and (y) satisfying the following relationship: ##EQU1## mixed with 40 to 100 parts by weight of carbon black and 0 to 60 parts by weight of a softener and vulcanized.

Abstract: A protective, easily removable laminate for application to the carpeting, and decorative seat and wall covering material of vehicles includes a plastic film coated on one surface with an acrylic resin based pressure sensitive adhesive. The film, in one form of the invention, is comprised of unoriented polypropylene capable of stretching and withstanding deep drawing and resisting the heat involved in thermoforming. The pressure sensitive adhesive is essentially of the type which does not adversely affect paint or trim material and which has preferential adhesion failure to the carpeting or seat or wall covering rather than to the film. In another form of the invention, the film, where it is not to be subjected to thermoforming operations, may be of a different composition such as polyethylene terephthalate, oriented polypropylene, polyethylene, or polyvinyl chloride. The method of employing the film in all forms of the invention is to apply the pressure sensitive adhesive to one surface of the film.

Abstract: Disclosed herein are method and apparatus for vulcanizing rubber. One example of an environment wherein the teachings of the present invention is quite useful is the environment of the creation of endless rubber belts by vulcanizing the ends of the belt together so as to make the belt endless. The apparatus disclosed herein basically consists of a pair of opposed thin sacks made of a flexible material which may, at the desired thickness thereof, comprise for example stainless steel. The ends of the belt are placed between these sacks and the sacks are supplied with steam at controlled temperature and pressure so as to provide the proper pressure as well as temperature for the vulcanizing process simultaneously.

Abstract: In this method of fabricating a hollow body, a first layer of fiber-reinforced hard-elastic plastic is formed to produce an inner layer of the hollow body with the fibers of the fiber-reinforced hard-elastic plastic extending skew to the longitudinal axis of the hollow body within a predetermined range of fiber orientation angles. A second outer layer of fiber-reinforced hard-elastic plastic is formed around the inner layer with the fibers oriented in a predetermined different range of fiber orientation angles. At least one of the layers is heated to a desired elevated temperature. At least one of the layers is subjected to a predetermined force or combination of forces. The hollow body is then cooled to the hard-elastic state, locking internal stresses into the two layers when the applied forces are removed.

Abstract: A method of producing strip comprising at least two material layers of different chemical composition bonded one to another, in which separate slurries of powders of different chemical compositions are formed in film-forming cellulose derivatives. Dried layers in strip form are produced from the slurries and these layers are fed, while under tension in interfacial contact, into the nip of a pair of compaction rolls to effect a mechanical bond between the layers. At least one of the strip layers may be subjected to a sintering operation prior to being fed into the nip of the compaction rolls.