Abstract: A method and device (1) for applying threads (9) on a support (11) in order o obtain a ply (13) while imparting a sinuous form to the threads. There is used a rotary drum (2) having rows (4A) of fixed teeth (5A) and rows (4B) with movable teeth (5B) which are displaced parallel to the axis of rotation of the drum. Plies obtained with this method or device and articles incorporating such plies, such articles being, for instance, tires.

Abstract: An assembly formed of a tire and removable protector, intended to be mounted and used on a rim having frustoconical seats. The tire has beads (5) the outer contour of which is formed primarily by a frustoconical zone (80) substantially parallel to the axis of rotation and by a frustoconical zone forming an angle of between 45.degree. and 90.degree. with the axis of rotation. The removable protector (2), the contours of which are adapted on the one hand to the profile (10, 11, 12) of the mounting rim (J) and, on the other hand, to the profile (80, 81, 82) of the corresponding bead (5), is reinforced by a bead ring (3) around which there is wrapped a ply (4) forming two layers (41, 42) extending up to the point (40') of said removable protector (2). While improving the initial life of the tire, the invention permits easier and less expensive recapping.

Abstract: In order to be able to increase the diameter of the standard rim (J') of a ire (P) without independent inner tube, which is provided with beads the seats of which are frustoconical and is normally used on this standard rim (J') having a mounting groove, the tire (P) is mounted on the rim (J) having a cylindrical rim base without mounting groove and the diameter (.phi..sub.JS) of which is greater than the diameter of the mounting groove of the rim (J') by means of two adapters (S.sub.1, S.sub.2) of compression-resistant vulcanized rubber reinforced by meridian and circumferential elements.

Abstract: The rim in accordance with the invention is a rim formed of a metal rim b (1) and two movable side rings (2), each of said rings (2) consisting of vulcanized rubber reinforced by a circumferentially stretchable annular element (41) the cross-section of which is only slightly deformable under compressive stress. A tire of an H/B form ratio of 0.80 which is particularly adapted to such a rim has beads each comprising two annular elements (64', 64"; 74', 74"; 84', 84"; 94', 94") which are unstretchable and have faces which make it possible to insert between them either the end (72, 92) of the carcass reinforcement (70, 90) or the carcass reinforcement (60, 80) and/or itself or its turn-up (61, 81).

Abstract: A method and device (1) for melting an organic product (4) by microwaves. e device (1) comprises electromagnetic field produced by at least one waveguide (6) for microwaves fastened to a metal receptacle (3) containing the initial solid organic product (4). The microwaves effect the melting of the solid (4) with the formation of an upper liquid layer (11). Means (12) make it possible to erode the still solid part of the product (4) which is in contact with the liquid (11).

Abstract: The rim (1), which is intended to be equipped with a tire P of tubeless t, has a groove (11) adjacent the rim lip (10). This groove (11) is closed by an annular packing (2) having a valve (3). The valve body (32) is surrounded by a sheathing (21) of vulcanized rubber; the secant modulus of elasticity of which, under compression, is equal to at most 0.20 times the secant modulus of compression of the vulcanized rubber constituting the packing, these two moduli being measured under a relative deformation of 10%. A slot is provided in the rim for the entrance of inflation air.

Abstract: A sulfur-vulcanizable rubber composition obtained by thermomechanical worg of a conjugated diene compound and an aromatic vinyl compound prepared by solution polymerization in a hydrocarbon solvent having a total content of aromatic vinyl compound of between 5% and 50% and a glass transition temperature (Tg) of between 0.degree. C. and -80.degree. C. with 30 to 150 parts by weight per 100 parts by weight of elastomer of a silica having a BET surface area of between 100 and 250 m.sup.2 /g, a CTAB surface area of between 100 and 250 m.sup.2 /g, an oil absorption measured in DBP of between 150 and 250 ml/100 g, and an average projected area of the aggregates greater than 8500 nm.sup.2 before use and between 7000 and 8400 nm.sup.2 after thermomechanical mixing as well as the additives conventionally employed, with the exception of the sulfur vulcanization system, comprising at least one heat step reaching a temperature of between 130.degree. C. and 180.degree. C.

Abstract: The removal of the tread consists in grasping a zero-degree reinforcement rd, which the crown of the tire must necessarily contain in order to apply this method, and pulling transversely on it until it is completely removed from the tire. In this way, the tread is very easily separated from the carcass of the tire.

Abstract: A method of treating a reinforcement at least the surface of which is metallic in such a manner as to favor its adherence to a rubber-base composition, characterized by the fact that the surface of this reinforcement is placed in contact with a solution of at least one cobalt and/or nickel compound in at least one organic compound containing one or more hydroxyl groups at a temperature of more than 100.degree. C. before placing the reinforcement in contact with the composition.

Abstract: A tire of the closed torus type is made solid with a rim due to bead wires hich hug a body tightly between themselves and the rim. At each lateral end of the rim, a shoulder is provided and extended by a seat. Diameter .phi..sub.s of the seat is always less than the shoulder diameter .phi..sub.c, and the shape of the bead wire assumes the shape of the rim over at least a 45.degree. sector.

Abstract: A sector-type mold for the molding and vulcanizing of tires, having shells 2) and the sectors (1) which cooperate to withstand the internal molding pressure and remain in closed position without the assistance of additional wedging or holding parts.

Abstract: Cylinder for rubber mixing mill, consisting of a hollow cylinder 1 and two flange-journals 2, 3 and driven by a hydraulic motor 21 with a hollow shaft. The hollow cylinder has longitudinal channels 4 provided with solid rods 8 fastened in the two flanges. The temperature regulation of the cylinder is provided by a crossed dual circuit. The temperature regulating fluid circulates in longitudinal channels 4 then cools the inner wall 19 of the hollow cylinder before being evacuated along the axis of the cylinder.

Abstract: A device (1) making it possible to apply at least one thread (2) to a supt (3) and characterized by the following features:it has a front clamp (4) and a rear clamp (5) along a direction of advance (F.sub.1);it has means (6, 7) for opening and closing said clamps (4, 5);it has means (8) permitting the displacement of the rear clamp (5) in the direction of advance (F.sub.1) or in a direction (F.sub.2) opposite to the direction of advance (F.sub.1); andit has means (9) for displacing the thread (2) in transverse directions.a reinforcing ply for a pneumatic tire having reinforcing threads applied on a support in a sinuous pattern having vertices.