Abstract:
A thread guide for an apparatus for the manufacture of a reinforcement from a thread deposited directly in its final position by projecting lengths of the thread for laying the thread onto a receiving surface in which a pair of deflectors is provided for guiding and controlling the braking pressure exerted on the threads before discharge from a projection orifice and in which at least one deflector is adjusted relative to the other by pivotally adjusting the deflector and locking it in place.
Abstract:
The tire reinforcements are made from a single cord, a section (40) of which is advanced over a rigid core (2) until at least its central portion is opposite its final position on the support, whereupon folders (5) apply the section (40) radially against the core (2) by means of tappets (50) which act on the length (40) in the manner of a finger. The repetition of the same cycle as many times as there are lengths of cord in the reinforcement makes it possible to produce the complete reinforcement.
Abstract:
An apparatus for the manufacture of a reinforcement from a thread directed in its final position by projecting lengths of the thread for laying the thread onto a receiving surface (S). The apparatus includes an assembly (5) having rollers (15) for the advancing of thread (1), a rotary conduit (2), a knife (3) for cutting the thread and freeing a length (10) upon each turn of said rotary conduit (2), and a thread guide (4) to receive the cut lengths of thread. The thread guide includes a cradle (41) provided with a fastening surface (42) which permits the detachable mounting of said thread guide (4) to said assembly (5).
Abstract:
A process for producing a tire reinforcement is characterized by the fact that each reinforcement cord is projected individually into its place in the reinforcement. For this purpose, a machine is used which comprises laying members comprising essentially a rotary conduit which projects the cord by a radially outer extremity of the conduit and rollers which impose a linear speed of laying of the cord.
Abstract:
A medium is analysed for the search for an odorous biological molecule characteristic of a specific substance in an environment to be studied comprising the steps of: exposing a component containing at least one olfactory biological receptor, capable of selectively attaching the type of odorous molecule sought, to an atmosphere taken from the environment to be studied; irradiating that component by means of an incident laser radiation having a wavelength chosen in the ultraviolet close to the absorption wavelength for the olfactory receptor, to cause the excitation of a resonance Raman scattering in the irradiated component; and analysing the Raman spectrum obtained to determine whether or not it corresponds to the Raman spectrum of the olfactory receptor having attached an odorous molecule of the type sought in the atmosphere sampled, so as to identify any presence of the specific substance mentioned in the environment to be studied. The method applies particularly to the identification of toxic or hazardous substances in packaged products or objects or where access to them is difficult, for example during transit.
Abstract:
The reinforcements for tires are made from a single cord (4) laid by a laying head (3A) which describes a path of any type surrounding the rigid core (2) which constitutes a rigid support on which the tire is progressively built. The path comprises a laying zone during which the laying head (3A) applies a length of cord. Between two successive passes of the laying head (3A), the rigid core (2) turns by an amount corresponding to the laying pitch.
Abstract:
A cutting device and method in which a reinforcement is guided to a cutoff point where it is cut by a knife driven by a rotary shaft and carried along a closed path which brings the knife into cutting relationship with the reinforcement during predetermined cycles.
Abstract:
The apparatus for the manufacture of a reinforcement from a thread deposited directly in its final position by projecting lengths of the thread for laying the thread onto a receiving surface (S). The apparatus includes an assembly (5) comprising rollers (15) for the advancing of thread (1), a rotary conduit (2), a knife (3) for cutting the thread and freeing a length (10) upon each turn of said rotary conduit (2), and a thread guide (4) to receive the cut lengths of thread. The thread guide comprises deflectors (43) exerting a pressure on the thread. The pressure of the deflectors can be adjusted by screws (7).
Abstract:
The laying of pieces 40 of cord 4 is assured by a laying tube 30 which receives the cord by placing its inlet facing the outlet of a cord distributor, the knife 85 of which cuts the cord just upstream of the laying tube 30. At the end of the laying tube 30 there is disposed a laying head 32 which is displaced transversely along the support 1 on which the reinforcement is built. The angle of laying of the cord is adjusted by judiciously coordinating the transverse speed of displacement of the head 32 and the speed of rotation of the support 1.
Abstract:
An optical device (1) includes a cavity (2) for which at least part is ellipsoidal with a first focus (F1) and a second focus (F2). The device includes means of presenting a medium containing components to be analyzed in the cavity at the first focus, and the device also includes means of transporting an excitation light beam in the cavity along a path also passing through the first focus (F1) to illuminate the medium at the first focus. The ellipsoidal part of the cavity includes a wall reflecting light emitted by the medium in response to the excitation light beam, and the device includes means (5) of collecting said emitted light at the second focus (F2).