Abstract: A tubular fibrous architecture is disclosed. According to one aspect, the tubular fibrous architecture includes a closed tubular part in at least one of its ends or bottom. The closed tubular part includes an architecture in which a textile material, such as a thread, roving, ribbon or bundle of threads, is continuously output from the bottom. Each textile material that is output from the bottom is continuously wound about the tubular part. All of the textile materials at the junction between the bottom and the remainder of the tubular part are continuous and there is a continuous geometric transition between the bottom architecture and the architecture of the remainder of the tubular part such that the textile materials in the tubular part cross over. A method of making such a tubular fibrous architecture is also disclosed.

Abstract: The invention relates to a tubular fibrous architecture with a closed tubular part at least one of its ends or bottom, in which: the tubular part is composed of an architecture in which each thread, roving, ribbon or bundle of threads, hereinafter referred to under the generic term thread, is continuously output from the bottom, each thread output from the bottom is continuously located in the tubular part, through each of its ends, all threads at the junction between the bottom and the remainder of the tubular part are continuous and there is a continuous geometric transition between the bottom architecture and the architecture of the remainder of the tubular part, the threads in the tubular part cross over, preferably in accordance with a braiding or weaving method. The invention also relates to the method of making such a tubular fibrous architecture.

Abstract: A plurality of unidirectional sheets (30a, 30b, 30c) are superposed in different directions and they are bonded together. At least one of the unidirectional sheets is made by spreading a tow so as to obtain uniform thickness, width not less than 5 cm, and a weight of no more than 300 g/m2, cohesion being imparted to the sheet so as to enable it to be handled prior to being superposed with other sheets. Advantageously, the unidirectional sheets are made of carbon fibers and are obtained by spreading out large tows.

Abstract: A plurality of unidirectional sheets (30a, 30b, 30c) are superposed in different directions and they are bonded together. At least one of the unidirectional sheets is made by spreading a tow so as to obtain uniform thickness, width not less than 5 cm, and a weight of no more than 300 g/m2, cohesion being imparted to the sheet so as to enable it to be handled prior to being superposed with other sheets. Advantageously, the unidirectional sheets are made of carbon fibers and are obtained by spreading out large tows.

Abstract: A drilling system includes a drilling jig which is used for a dental implant where the dental implant has a bore designed to received a clamp of the drilling jig. The bore enables the drilling jig to be guided for producing one or several lateral holes in the bone and for passing through one or several pins. The dental implant also includes a jig body accurately fixed on a positioning member integral with the dental implant, and an elongated part or socket which slides in the jig body to be urged in contact with the bone. A pin and pin holder cooperate with each other and the jig.

Abstract: A plurality of unidirectional sheets (30a, 30b, 30c) are superposed in different directions and they are bonded together. At least one of the unidirectional sheets is made by spreading a tow so as to obtain uniform thickness, width not less than 5 cm, and a weight of no more than 300 g/m2, cohesion being imparted to the sheet so as to enable it to be handled prior to being superposed with other sheets. Advantageously, the unidirectional sheets are made of carbon fibers and are obtained by spreading out large tows.

Abstract: A plurality of unidirectional sheets (30a, 30b, 30c) are superposed in different directions and they are bonded together. At least one of the unidirectional sheets is made by spreading a tow so as to obtain uniform thickness, width not less than 5 cm, and a weight of no more than 300 g/m2, cohesion being imparted to the sheet so as to enable it to be handled prior to being superposed with other sheets. Advantageously, the unidirectional sheets are made of carbon fibers and are obtained by spreading out large tows.

Abstract: A drilling system includes a drilling jig which is used for a dental implant where the dental implant has a bore designed to received a clamp of the drilling jig. The bore enables the drilling jig to be guided for producing one or several lateral holes in the bone and for passing through one or several pins. The dental implant also includes a jig body accurately fixed on a positioning member integral with the dental implant, and an elongated part or socket which slides in the jig body to be urged in contact with the bone. A pin and pin holder cooperate with each other and the jig.

Abstract: A drilling jig is used for a dental implant which dental implant has a bore designed to received a clamp of the drilling jig. The bore enables the drilling jig to be guided for producing one or several lateral holes in the bone and for passing through one or several pins. The dental implant also includes a jig body accurately fixed on a positioning member integral with the dental implant, and an elongated part or socket which slides in the jig body to be urged in contact with the bone.

Abstract: Method and machine for producing multiaxial fibrous webs. A plurality of unidirectional sheets (30a, 30b, 30c) are superposed in different directions and they are bonded together. At least one of the unidirectional sheets is made by spreading a tow so as to obtain uniform thickness, width not less than 5 cm, and a weight of no more than 300 g/m2, cohesion being imparted to the sheet so as to enable it to be handled prior to being superposed with other sheets. Advantageously, the unidirectional sheets are made of carbon fibers and are obtained by spreading out large tows.

Abstract: A plurality of unidirectional sheets (30a, 30b, 30c) are superposed in different directions and they are bonded together. At least one of the unidirectional sheets is made by spreading a tow so as to obtain uniform thickness, width not less than 5 cm, and a weight of no more than 300 g/m2, cohesion being imparted to the sheet so as to enable it to be handled prior to being superposed with other sheets. Advantageously, the unidirectional sheets are made of carbon fibers and are obtained by spreading out large tows.

Abstract: Fiber preforms for use in the manufacture of composite material annular ps are made by winding superposed layers of a strip of cloth (10) of spiral or helical shape comprising substantially helical warp threads and substantially radial weft threads. The mass per unit area of the warp of the helical cloth increases between its inside diameter and its outside diameter, and the layers of the strip of cloth are needled so as to be bonded together by fibers pulled from the yarn of the cloth, the increase in mass per unit area of the warp at least approximately compensating, in terms of density per unit volume of the preform, the decrease in density of the weft between the inside diameter and the outside diameter.

Abstract: A woven fabric to be used in formation of a composite material includes multifilament warp and weft threads. Each of the warp threads and the weft threads have a total weight less than 80% of the weight of the fabric. The woven warp and weft threads have O twist/m and a torsion no greater than an original torsion of the threads before weaving. Each woven warp and weft thread has a width over the entire length thereof that is greater than or equal to an original width before weaving. The fabric is woven to have a given weight per unit area and a fiber volume ratio that is approximately constant throughout the fabric and that is satisfactory for use of the fabric in a composite material. The warp and weft threads of a yarn count that is greater than a yarn count traditionally used to achieve the fiber volume ratio for the given weight per unit area.

Abstract: A woven fabric to be used in formation of a composite material includes multifilament warp and weft threads. Each of the warp threads and the weft threads have a total weight less than 80% of the weight of the fabric. The woven warp and weft threads have 0 twist/m and a torsion no greater than an original torsion of the threads before weaving. Each woven warp and weft thread has a width over the entire length thereof that is greater than or equal to an original width before weaving. The fabric is woven to have a given weight per unit area and a fiber volume ratio that is approximately constant throughout the fabric and that is satisfactory for use of the fabric in a composite material. The warp and weft threads of a yarn count that is greater than a yarn count traditionally used to achieve the fiber volume ratio for the given weight per unit area.

Abstract: Textile reinforcing material useful for producing composite laminated articles by a general injection-molding technique, which is fabricated by arranging a stack of layers having textile reinforcements in a mold of a shape corresponding to that of the article to be fabricated and, after the mold has been closed, injecting a resin into it. At least one layer of the stack of textile reinforcements has a structure in which ducts extend in at least one direction therein to facilitate the flow of the resin during injection.

Abstract: Textile structure useful as a reinforcement in the manufacture of composite materials is produced using technical yarns. At least some of the yarns are formed from three constituents, namely a substantially straight core, a relief yarn, and an independent binding yarn. The relief yarn is secured to the core by the binding yarn.

Abstract: A laminated material having a cross section comprising a core and at least one lateral wing, for example a cross section in the form of an I, T, J, .OMEGA. or the like is provided as a result of the impregnation of a reinforcing textile structure and the hardening of the assembly. The textile structure includes two woven laps spaced from one another and a connecting lap extending between the two laps. The material is characterized in that the connecting lap consists of at least one lap of warp binding threads trapped between the weft threads of the two woven laps.

Abstract: Textile structure based on filaments impregnated and/or coated with thermoplastic material (FIT filaments) is formed from at least two layers of such FIT filaments, arranged perpendicularly to one another in the manner of a warp and a weft, but without being interlaced, and a binding weave consisting of a warp and a weft holding each of the FIT filaments in position. The textile structure is particularly applicable to the production of laminates exhibiting high mechanical stength.

Abstract: A multilayer textile article for the production of laminated materials has layers each consisting of a two-directional cloth, the layers being joined together by a third thread extending in a direction inclined to the direction in which the threads of the layers extend. According to the invention the third thread forms a continuous stitching (C), the stitching extending helically from one end of the layers to the other.

Abstract: The invention relates to a process for the production of hollow bodies of revolution formed from threads extending in three different directions, as well as to a machine for performing this process. The machining of a mandrel, the installation or implantation of retaining or locking rings on this mandrel, the winding and weaving of the threads in circumferential, longitudinal passages formed between the locking rings and the appropriate dimensional controls and checks are carried out on the same machine. On one side of the horizontal axis of the machine is provided a mobile support on which can be mounted the subassemblies for machining the mandrel, the implantation of the locking rings, winding and control, the weaving system being placed on the other side of the axis. In order the facilitate the weaving operations, the weaving carriage moves parallel to a fictitious generatrix joining the ends of the body, the weaving means being oriented perpendicular to said generatrix.