Abstract: An apparatus for making a rotationally symmetrical body formed of crisscross-wound layers, comprises a rotatable winding mandrel, a carriage arranged for travel back and forth along the mandrel; and a thread laying mechanism for receiving simultaneously a plurality of threads from a thread supply and for depositing the threads on the mandrel during rotation thereof and during the back-and-forth travel of the carriage. The thread laying mechanism has a laying roller having a peripheral surface void of grooves. The threads are trained about the peripheral surface of the laying roller and deposited therefrom onto the winding mandrel. The thread laying mechanism further has a guide element for receiving the threads and advancing them to the peripheral surface of the laying roller in predetermined distances from one another.
Abstract: This invention concerns a tire especially for motorcycles, having a textile carcass that comprises at least one pair of cord plies. Each ply has a plurality of cords. The cords are parallel to each other, crossed with those of the adjacent plies and are symmetrically inclined with respect to the circumferential direction, preferably at an angle between 50.degree. and 65.degree. to the midcircumferential plane, measured on the tire crown zone. The tire also has an annular reinforcing structure between the carcass and the tread, comprising at least one pair of textile cord strips, the cords of said strips being crossed with each other and symmetrically inclined with respect to the circumferential direction, at an angle comprised between 18.degree. and 25.degree., measured also on the crown of the tire.
Abstract: The invention relates to an accessory for an "orbitread" tread builder, or the like, whereby waste rubber crumbs or buffing dust can be used for the formation of a tread strip to be applied onto a tire casing to form a new tread layer. The accessory essentially includes a feeding arrangement to feed the crumbs or dust into the screw or worm conveyor of the tread builder, where it is combined with the conventionally used rubber compound which is extruded into the required tread strip form.
Abstract: A heavy duty pneumatic radial tire is disclosed, having bead portions with an improved durability. The tire is provided with a carcass of at least one ply, including a carcass body extending between both bead portions of the tire, and turn-up portions which are contiguous with the carcass body and arranged around and radially outwardly of bead wires. In a particular radial region of the tire, the distance G between center lines of the carcass body and the turn-up portion of the carcass is optimized in accordance with relevant dimensional parameters of the tire, to minimize strains and suppress separations in the bead portions.
Abstract: A radial tire for passenger cars comprising a rubber filler interposed between a turn-up portion of a carcass ply wound around a bead ring from the inside toward the outside thereof and the carcass ply and having a dynamic modulus of elasticity of at least 300 kg/cm.sup.2 and comprising an additional layer closely adhered to said rubber filler and composed of cords having a high modulus of elasticity which is larger than 2.5.times.10.sup.5 kg/cm.sup.2 and inclined at an angle within a range between 45.degree. and 75.degree. with respect to the carcass cord, the additional layer being arranged over a range which is 50% to 75% of the tire sectional height.
Abstract: A pneumatic radial tire wherein with respect to a central plane of a wheel in a transversely sectional plane containing a rotary axis of the tire, a carcass and a reinforcing belt layer have respectively symmetrical contour profiles and a tread portion has an asymmetrical contour profile. The contour of the tread within the transverse sectional plane satisfies the following relations:the maximum outer diameter point is positioned at a place axially apart from the central plane of the wheel and a distance between the maximum outer diameter point and the central plane of the wheel is not less than 1/10 times the maximum width of the tire;when contours of portions of the tread located on opposite sides of the maximum outer diameter point are approximated by respectively two arches, the radius of curvature, R.sub.2, of the narrower section is larger than the radius of curvature, R.sub.
Abstract: Continuous process for the manufacture of disposable diapers having an absorbent pad fixed inside a moisture-impermeable envelope. There are front and back transverse margins and a central crotch zone provided with lateral cut-outs to let the legs through. An elastic strand is fixed to the impermeable envelope by adhesion, at least in the crotch zone, and brought into contact with the inner face of the impermeable envelope while continuously driven by a smooth-surfaced rotary drum. The elastic strands are coated with adhesive throughout their length, and the tension exerted on them at the points of contact with the impermeable envelope is made to vary between a value approaching zero, corresponding to the portions of the elastic strands adhered onto the front and back transverse margins, and a maximum value corresponding to the portions of the elastic strands adhered onto the central crotch zone.
Abstract: Radial tires for motorcycles comprising a tread portion, side wall portions, bead portions, a carcass, bead apexes made of a rubber having a high hardness, and optionally reinforcing cord layers arranged outside the bead apexes, said tread portion having shoulder grooves at the shoulder portion thereof and center grooves at the center portion thereof and the depth of the shoulder grooves being from 5 to 50% of the depth of the center grooves, whereby cracking of the shoulder groove bottom caused by providing the bead apexes made of a hard rubber or the reinforcing cord layers is prevented.
Abstract: A method of manufacturing surface relief holograms wherein an original surface relief hologram in the form of an endless loop or a drum is continuously coated with a radiation-curable resin. After curing, the resin bears a replica of the original hologram and it is continuously drawn off from the original as a sheet or film. The replica film becomes a hot-stamping foil when formed in contact with a carrier film, metallized, and coated with a hot-stamping adhesive.
Abstract: An improved retreaded tire which is less expensive and lighter weight and which can be cured in less time results from the use of cushion gum layers which have been subjected to electron irradiation or other means of radiation having the same curing effect thereon.
Abstract: A tire valve assembly (56, 58) for a central tire inflation system (10) effective to automatically isolate a tire (12) pressurized to less than a predetermined minimum pressure from the remainder of the system is provided. The tire valve assembly includes a control valve (58) and a low tire pressure shut-off valve (56) which are connected to a selectively pressurized and vented conduit (52) and to a conduit (68) fluidly communicating with the interior pressurized chamber (74) of the tire. A single selectively pressurized and vented conduit (52) operates the control valve and provides the sole connection of the assembly to pressurized fluid and/or to venting to atmosphere required for system operation other than for initial inflation of the tires to the predetermined minimum pressure thereof.
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.
January 10, 1986
Date of Patent:
July 5, 1988
Compagnie Generale des Establissements Michelin
Jean-Louis Bocquet, Jacques Gouttebessis, Maurice Rey
Abstract: A reinforcement ply intended for use in a tire is characterized by the fact that the reinforcement ply is formed, at least in part, of a fabric having the following properties: (a) the fabric comprises a three-dimensional body and reinforcement threads arranged in the body and held by the body; and (b) practically all the voids in the fabric are capable of being impregnated with at least one material which forms part of the structure of the tire. The invention also relates to these plies which are impregnated with at least one material which forms part of the structure of the tires. The invention further relates to tires having at least one reinforcement ply, as well as to the methods for obtaining such tires.
September 23, 1987
Date of Patent:
July 5, 1988
Compagnie Generale des Etablissements Michelin
Abstract: A radial tire having excellent cornering stability and high-speed durability is disclosed. The tire has a belt composed of a first structural body, which consists of a single rubberized cord layer containing cords of twisted metal wires and is folded at both lengthwise end portions, and a second structural body consisting of at least one rubberized cord layer containing unextensible cords, wherein the cord of twisted metal wires used in the first structural body has a specifically limited twisting construction and a specifically limited elongation.
Abstract: In the feeding of a strip of tire building material to a former, it is desirable to achieve a butt-joint between the ends of the strip when it has been wrapped fully around the circumference of the former (which may already have some material which has been wrapped around its surface in a previous operation). As the strip is fed to the former, its length is measured and the diameter of the former is adjusted if necessary to match the circumference of the former (and any existing material thereon) to the length of the strip.
Abstract: Silk screen roller applicators, employed in a process which is also known as Screen Process Printing, are often used in the printing of labels and other materials. The present invention involves joining the edges of silk screen type material along a very narrow line, such as 1/32 inch, so that economies are achieved in printing and the associated use of paper, when the resultant applicator is formed. The two edges to be joined are each marked with at least two index marks, and these are aligned with corresponding light slots which are located on a base on either side of a fusing line. The silk screen type mesh which may be formed of a polyester coated with nickel, may be held down by magnetic plates, and the edges are accurately overlapped by aligning the index marks and the light guide slots, through the use of eccentric or similar mechanisms. A thin thread of nylon or other fusible material is tightly drawn between the edges of the fabric along the fusing line, with the fabric overlapped by about 1/32 inch.
Abstract: A tire cord for the belts of a radial or bias-belted tire, is described as consisting of only two brass-coated metal wires which are helically twisted to have a lay length of from 14 to 18 millimeters. Each of the wires has a diameter of 0.28 millimeters, and is composed of steel which has a carbon content of at least 0.80%, by weight.
Abstract: A tubular tire for a bicycle having the carcass seamed on its inner periphery to enclose an inner tube. The seaming is covered by a hand of rubberized fabric that is bonded to and extends around the inner periphery of the tire carcass. The band has two fracture lines so that the band can be torn away to expose the seaming for removal of the inner tube. A non-bonded area on the band permits access to start the tearing.
Abstract: A multilayer identification card containing an IC module in a cavity. The cavity is filled with a polymer with a consistency ranging from liquid to pasty before the card compound is laminated using pressure and heat. During lamination, the polymer completely fills in the cavity around the IC module, supported by the applied pressure. In the finished card, the polymer is cross-linked to form a solid, rubber-like mass, which protects the IC module in the cavity of the card.
September 22, 1986
Date of Patent:
May 24, 1988
GAO Gesellschaft fur Automation und Organisation mbH
Abstract: The liner includes a generally C-shaped, flexible band of bearing material disposed to be placed around the .[.drop.]. center .Iadd.section .Iaddend.of a tire rim. .[.Two, complimentary, generally semi-circular.]. .Iadd.A plurality of arcuate .Iaddend.members made from a polyester elastomer are then mounted as a ring coaxially around the outside of the band with the inner peripheral surfaces thereof slidably seated in a circumferential groove that is formed in the outer periphery of the band. The confronting ends of the members are releasably secured together by a pair of rigid links, each of which is releasably and pivotally mounted at one end in a recess in one end of a member, and has its opposite end connected to a rotatable eccentric that is mounted in the confronting end of the other member.