Abstract: The invention concerns a coagulating agent for liquid crystal solutions with a base of cellulose substances, characterised in that it contains at least one water soluble additive selected from the group consisting of ammonia, amines of salt of these compounds, the additive being such that the pH of the said coagulating agent is greater than 6. A preferable additive is a salt elected from the group consisting of ammonium formates, acetates and phosphates, mixed salts of these compounds, or mixtures of these constituents, in particular diammonium orthophosphates (NH4)2HPO4. The invention also concerns a method for spinning a liquid crystal solution with a base of cellulose substances, using a coagulating agent as per the invention, in particular the method called the “dry-jet-wet-spinning” as well as spun articles, fibers or films, obtained by these methods.

Abstract: The invention concerns a coagulating agent for liquid crystal solutions with a base of cellulose substances, characterised in that it contains at least one water soluble additive selected from the group consisting of ammonia, amines of salt of these compounds, the additive being such that the pH of the said coagulating agent is greater than 6. A preferable additive is a salt elected from the group consisting of ammonium formates, acetates and phosphates, mixed salts of these compounds, or mixtures of these constituents, in particular diammonium orthophosphates (NH4)2 HPO4. The invention also concerns a method for spinning a liquid crystal solution with a base of cellulose substances, using a coagulating agent as per the invention, in particular the method called the “dry-jet-wet-spinning” as well as spun articles, fibers or films, obtained by these methods.

Abstract: The invention concerns an aqueous coagulating agent for a liquid crystal solution with a base of cellulose substances, characterized by the following: it contains water and at least one additive; when it is contacted with said solution, the diffusion kinetics (diffusion front D) of the coagulating agent and that of the precipitation (precipitation front P) of the cellulose substances by the action of said agent, measured under the microscope for the so-called “coagulation test” for an additive proportion of 20 wt. %, comply with the following relationship: 0.55 is <Kp/Kd≦1, Kp and Kd being respectively the factors of diffusion and precipitation (respective “Fick” straight line gradients), expressed in &mgr;ms½.

Abstract: A device for storage of an uncured rubber product is provided. The device comprised of:a bobbin composed of two flanges, each equipped with a border support portion fitted on the axially interior side of said flange, the border support portion having the general appearance of a spiral forming several turns, said border support portion being shifted forward, on each turn, axially toward the outside;an interleaf in the form of an elongated strip, resting on the said border support portions, the interleaf having a variable width, adapted to the axial distance between the said border support portions.

Abstract: The present invention provides a method for monitoring the pressure of ti in accordance with which a tire monitoring system operates according to a normal mode of detecting flats and under-inflation and according to an assistance mode when reinflating the tires. The switch between the two modes does not require any intervention by the user: through detection of an increase of the inflation pressure in a tire, it can be deduced that the tire in question is in the process of reinflation.

Abstract: Process and device for assembly of a tire casing (2) and a prevulcanized ular tread member (1), in view of recapping tires whose tread member is worn or production of new tires, to which the annular tread member (1) is extended by centrifugation.

Abstract: The elements described refer to an apparatus for the manufacture of a tire einforcement from a single cord. Each lever 2 of the apparatus is provided at its end with a groove 3 which describes a partial oval. The cord is hooked therein. A recess 28 serves as a template for the installation of a bead wire.

Abstract: The apparatus concerns the manufacture of tires having at least one reinfement formed from a single thread. It is of the type comprising two coaxial crowns 1 of levers 2 the ends of which bear means 3 for retaining the thread and comprising means 5 for presenting the thread 4 to said retaining means 3. The presentation means 5 comprise a presentation head 50 carried by a flexible belt 55 mounted on two guide pulleys 51, the axes of rotation of which are perpendicular to the axis of the crowns 1, said guide pulleys 51 being arranged in the vicinity of the retaining means 3. The presentation means 5 also comprise an orifice 53 conducting said thread 4 substantially in the plane of and within the loop formed by the belt 55.

Abstract: A method and device for thermally treating at least one carbon steel wire such a way as to obtain a homogenous austenite structure, characterized by the fact that the wire is heated in a tube containing a gas which has practically no forced ventilation, the gas being directly in contact with the wire and the time of heating of the wire being less than 4 seconds per millimeter of diameter of the wire. Pearlitization installation using such a method and device.

Abstract: A method and device for securing the ends of a single reinforcement cord to the unvulcanized core (7) of a tire utilizing two jaws (10, 11) which clamp the cords arranged at the starting end (41, 42) and terminating end (43, 44) of the reinforcement. A cutting blade (13) cuts the cord which then, without loosening the jaws, are pressed against the core (7) in order to immobilize the cord (4) due to the layer of raw rubber with which the core (7) has been previously covered.

Abstract: A radial off-road tire has a sidewall provided with a protective rib which s located substantially at or outwardly of the level of the maximum axial width of the carcass reinforcement. The geometrical characteristics of length, thickness and location of the protective rib to the rest of the wall, combined with the characteristics of meridian radius of curvature of the tread and the angle which the upper face of the sidewall makes with the direction parallel to the axis of rotation of the tire makes it possible to increase the life of the tire and minimize the rate of propagation of scratches initiated by cutting objects.

Abstract: A method of obtaining a reinforcing assembly comprising reinforcement threads and a solid matrix is characterized by the fact that reinforcement threads surrounded individually by a sheathing of organic material I and furthermore surrounded by another sheathing of organic material II are grouped together, by the fact that the material II is caused to migrate into voids between the threads sheathed with material I and by the fact that the material II is caused to solidify.

Abstract: The manufacture of a reinforcement for a tire comprises the following ste s:(a) a continuous cord is hooked to retention means disposed in two circles which are a distance apart which corresponds to the length of the path of a cord from one side of the reinforcement to the other so that the cord, disposed in this way, defines a cylinder by a plurality of passes back and forth from one retention means to another,(b) by a suitable movement of the retention means, the cord which is disposed in this way is folded back on and around a core defining the shape of the inner surface of the tire,(c) the anchoring of the cord being assured, the retention means are released.