Abstract: A fabric 3 for power transmission belt to be adhered to a belt body 2 of a V-ribbed belt 1 is formed such that carbon fibers with electric conductivity are mixed through spinning into a fabric material such as cotton, nylon and polyester. This prevents the belt from producing a beating sound and producing worn-out dusts in the use as a power transmission belt and enhances the electric conductivity of the power transmission belt to successfully prevent electrostatic charge of the belt.

Abstract: A component for a power transmission belt. The component is a fiber cord that is treated in a first step with at least one of a) an isocyanate compound and b) an epoxy compound such that after the first step the at least one of the isocyanate compound and epoxy compound is present in solid form in an amount equal to 0.5 to 2.0 weight %. The fiber cord is treated after the first step in a second step with an RFL liquid so that the percentage void in the cord, as determined by the following formula, is not greater than 1.5%:percentage void=100.times.A.sub.y /A.sub.x, where A.sub.x is the total surface area of the cord and A.sub.y is the void area.

Abstract: A method of making a reinforcing fabric having wide angles between the warp yarns and the weft yarns by helically folding on itself a strip of fabric which has been skewed such that the angle .alpha. between the warp yarns and the weft yarns is from 100.degree. to 140.degree..

Abstract: A conveyor belt is described having a woven fabric backing which includes staple fiber yarn and includes a twill weave with an inclination angle of 10.degree. to 70.degree. relative to the moving direction of the conveyor belt, and in which adjacent yarns have the same direction of lay. In the woven fabric backing the staple fiber yarn is provided as warp yarn, each of which has the same direction of lay in its longitudinal direction, and adjacent yarns of which are alternately S and Z twisted. Additionally, elements which support the tensile forces are arranged in the conveyor belt, the elements being arranged in a woven fabric or being sheathed as threads by staple fibers. Since the staple fiber yarn of the warp of the woven fabric backing extends diagonally over the entire width of the conveyor belt, an endless support results even when the belt runs over an edge, and an absolutely uniform vibration-free conveyor belt movement having a low noise level is achieved even when the belt passes over an edge.

Abstract: A V-ribbed belt applicable to back-face drive includes, as a belt body, an adhesion rubber layer having a rectangular section and extending in the longitudinal direction of the belt, a compression rubber layer disposed on the inner face of the adhesion rubber layer, an upper fabric layer disposed on the back face of the adhesion rubber layer as a peelable layer, and cords disposed within the adhesion rubber layer, and a mark indicating a manufacture lot number and the like is disposed on the back side of the belt body. Specifically, the mark is sandwiched between the adhesion rubber layer and the upper fabric layer. As a result, a level difference derived from the mark on the back side of the belt body is suppressed, so as to prevent a noise in driving the belt. In addition, the mark can be prevented from erasing in driving the belt on its back face. In case of necessity, for example, when it is necessary to pursue a lot, the upper fabric layer can be peeled to confirm the mark.

Abstract: A top fabric 2 which is disposed on the back face of a power transmission belt 1 is obtained by joining a plurality of rubberized fabric pieces 2a, in each of which warps 7 and wefts 8 intersect each other at an obtuse angle which is open toward the direction of the length of the belt, in the shape of a ring. Joining lines of adjacent fabric pieces 2a, 2a both intersect at a right angle with respect to the direction of the length of the belt and are parallel to each other.

Abstract: A top fabric is laminated with an adhesion rubber sheet made of an unvulcanized rubber sheet, which is located on the upper side from a cord of an adhesion rubber layer and forms an upper rubber portion of the adhesion rubber layer, thereby forming a band-shaped laminate. Both longitudinal ends of the band-shaped laminate are butt-jointed with each other so as to produce no level difference at the top surface of the top fabric and at the bottom surface of the adhesion rubber sheet. Thereby, the cord wound around the laminate in the subsequent step is embedded in the adhesion rubber layer without being displaced in level so that the obtained V-ribbed belt produces no abnormal vibration and no noise even if used in serpentine drive.

Abstract: An apparatus and method for manufacturing a synchronous drive belt or timing belt is disclosed. The method allows a belt with axially interlocked teeth to be manufactured. The method utilizes transfer molding, as opposed to compression molding, and involves an inflatable diaphragm which pushes rubber radially outwardly from a mandrel into a mold having teeth on an inner surface. The method includes the provision of a barrier layer which can be advantageously built into the belt to improve the transfer molding process.

Abstract: A driving belt formed from a textile belt with plastic catch elements injection molded onto the belt. The catch elements have equal spacing from each other in the longitudinal direction of the belt. The belt has several parallel strips, which include non-reinforced strips and reinforced strips. The plastic completely penetrates the textile belt across the non-reinforced strips.

Abstract: In an improved power transmission belt, the circumferentially disposed reinforcing cords are made from multi-filament yarns of heterofilaments. These cords, when fused, have good inter-filament bonding without the solvent of the solvent/adhesive systems.

Abstract: In an improved power transmission belt, the circumferentially disposed reinforcing cords are made from multi-filament yarns of heterofilaments. These cords, when fused, have good inter-filament bonding without the solvent of the solvent/adhesive systems.

Abstract: An endless belt construction and method of making the same are provided, the endless belt construction being formed mainly of polymeric material and comprising a tension section, a compression section, a load carrying section disposed between the tension section and the compression section and being secured thereto, one of the sections comprising a plurality of layers of polymeric material disposed in stacked relation, and a paper-like sheet of non-woven material disposed between an adjacent pair of the layers of polymeric material and being secured thereto.

Abstract: A industrial fabric of monofilament of polyphthalamide having recurring units including copolymerized hexamethylene diamine and mixtures of copolymerized terephthalic acid, isophthalic acid, and adipic acid. The monofilament has excellent hydrolysis, chemical, and abrasion resistance. It is particularly useful for the cloth in the forming and pressing sections of a papermaking machine.

Abstract: A toothed belt includes a rubber composition-molded cured material, a tensile body embedded therewithin, and a tooth sheet. The rubber composition-molded cured material includes 0.38 to 0.91 g of organic peroxide, based on --O--O-linkage amount, to 100 g of a polymer composition in which zinc polymethacrylate and hydrogenated nitrile rubber with hydrogenation rate of 90 to 95% are compounded in the weight ratio of from 4:96 to 20:80, 0.5 to 2.0 g of more than one higher organic acid esters, 0.5 to 2.0 g of maleimide compound, and 20 to 40 g of calcium carbonate.

Abstract: A cover belt for a duct is presented, which can be swung up from a closed position by a deflecting device movable in the longitudinal direction of the duct and falls back in its closed position behind the deflecting device. The cover belt is made of a flexibly deformable material with metallic reinforcements. The cover belt is comprised of a securing strip, a joint strip and a cover strip. The securing strip is secured along the duct, the joint strip connects the securing strip flexibly to the cover strip, and the cover strip spans the duct and is supported on both sides of the duct. At least one belt-shaped textile reinforcement layer with essentially the same overall width as the cover belt is embedded in the flexibly deformable material in the area of the neutral plane of the cover belt.

Abstract: A power transmission belt includes a rubber belt body having a surface covered with a facing fabric. The facing fabric is treated with a resorcinol-formalin-latex (RFL) solution to adhere an amount of solid RFL effective to inhibit exposure of the rubber to a cooperating pulley of the covered surface. When the belt is a shaped belt the amount of solid RFL adheres to the facing fabric effective to allow the precise shape formation. The invention further contemplates a method of forming a belt including the steps of treating a facing fabric and adhering the facing fabric to a surface of the belt.

Abstract: A reinforcing fabric for reinforcing power transmission belts is comprised of a first fibrous web having minimal warp yarns and filler yarns oriented at a desired right lead. A second fibrous web is provided which has minimal warp yarns and filler yarns oriented at a desired left lead. The first and second fibrous webs are interconnected either mechanically, chemically, or both, so that an angle of between 178.degree. and 60.degree. is formed between the filler yarns of the first fibrous web and the filler yarns of the second fibrous web when viewed in the direction of tension on the power transmission belt. The resulting reinforcing fabric may be formed in the belt direction so that banner cutting is eliminated. This makes it possible to make an endless belt with only one splice.

Abstract: A power transmission belt having a belt body with a length, an inside, an outside and laterally spaced side surfaces and reinforcing fabric on at least one of the inside and outside of the body. The reinforcing fabric is formed from first yarns including a mixture of polymethaphenylene isophthalamide fibers and polyethylene terephthalate fibers.

Abstract: A reinforced conveyor belt especially suited to transport sharp objects such as glass and scrap metal. The belt has a top and bottom layer of flexible, abrasion-resistant material, such as rubber. There is a middle layer of woven, multi-layered fabric, preferably made of cotton threads with reinforcing rods interwoven therein. The reinforcement rods run transversely and occupy sites in the intermediate layers of the fabric normally occupied by weft threads. Interweaving the layers of fabric and inserting the rod into one of the intermediate fabric layer provides the belt with tensile strength, puncture resistance, and a barrier against longitudinal tearing. Finally, the bottom surface of the belt is textured to provide additional durability and traction.

Abstract: A method of making a plurality of toothed belt constructions and a set of such belt constructions are provided, the method including the steps of disposing tubular sleeves of stretchable fabric material respectively onto a plurality of toothed mold members having different diameters, forcing mold material against the outside surfaces of the sleeves to tend to stretch the fabric material into the grooves of the toothed mold members as the mold material enters the grooves of the mold members so that the resulting toothed belt constructions will have the fabric material thereof carried in certain positions relative to the respective teeth thereof, and forming the sleeves from the same fabric material and with the same diameters in the nonstretched condition thereof.

Abstract: Resistance to tooth chipping in toothed belt in which rubber teeth are covered by a tooth cloth, is improved by providing for residual elongation of the tooth cloth so that it does not float or separate from the rubber teeth when tooth-deforming forces are applied, and by providing the tooth cloth with sufficient breaking strength so that the product of its breaking strength and its elongation are at least equal to a specified value.

Abstract: A flexible transmission device for continuously variable transmissions comprises an endless flexible connecting element and a plurality of transverse links. Each link includes at least one groove into which is engaged the flexible connecting element. The links are, preferably, covered by a fabric, and the exterior surface of the fabric is for being positioned in contact with the flanges of the pulleys over which the belt is positioned and operates.

Abstract: A toothed belt of the present invention comprises a back surface section and tooth sections that are made of an acrylonitrile-butadiene copolymer (NBR) with a hydrogenation rate of 90% or more; a tooth cloth that covers the surface of the tooth sections and tooth lands, the tooth cloth being made of an industrial nylon raw fiber with a viscosity relative to sulfuric acid of 2.45 to 2.53, a tensile strength of 5 g/denier or more, and a fineness of single fibers of 5 denier or less and being treated with resorcinol-formaldehyde-latex (RFL) liquid in which resorcinol-formaldehyde resin is mixed with a hydrogenated NBR as a latex component; and core fibers with a core diameter of 0.63 to 0.85 mm, the core fibers being made of twisted bundles of glass fibers of high strength.

Abstract: A canvas cover for placement over an exposed surface of a power transmission belt having a length and width, which canvas cover consists of a yarn defining a weft for extension in the longitudinal direction with respect to a belt on which the canvas cover is to be placed, and a twisted yarn defining a warp for extension in the widthwise direction with respect to a belt on which the canvas cover is to be placed. The warp yarn is preferably made up of from 3-15 twisted mono-filaments each of 10-50 denier with a total denier of 210d.

Abstract: A woven fabric for covering a tooth part formed on a belt body of a synchronous belt is woven with a lengthwise yarn and a widthwise yarn. The lengthwise yarn is made of a crimped yarn of synthetic fiber or a covering yarn in which a crimped yarn of synthetic fiber is wound around an elastic cord yarn. The widthwise yarn is made of a spun yarn of synthetic fiber or meta-linked type aromatic polyamide fiber. The widthwise yarn expose more to the woven fabric surface than the lengthwise yarn. Thus, the belt life is lengthened and the noise reduced.

Abstract: An endless belt comprising a belt main body prepared from a liquid castable elastomeric material, a reinforcing fabric providing over the surface of the main body, and a shock absorbing layer of elastomeric material formed between the main body and the fabric. The belt is in the form of a flat belt or a belt having teeth or projections on at least one side thereof, has improved bending resistance and is operable with diminished noise. The belt is prepareed by a process comprising the steps of forming a shock absorbing layer of elastomeric material over the surface of a reinforcing fabric, fitting the fabric to one of an inner die and an outer die with the layer facing the other die, and pouring or injecting a liquid castable elastomeric material into a space between the fabric and the other die for molding.

Abstract: The invention provides a seamless semiconductive belt produced by cutting a seamless tubelike film made of a polycarbonate containing conductive carbon to desired length at right angles to the axial direction of the film, the film having a surface electrical resistance of about 10.sup.5 to about 10.sup.13 .OMEGA./.quadrature. and the ratio of minimum surface electrical resistance to maximum surface electrical resistance being at least 0.01.

Abstract: A multiribbed power transmission belt having an inner portion of the compression section thereof defined by arcuate side surfaces converging inwardly. In one form, the side surfaces are circular. The outer portion of the compression section is defined by planar side surfaces converging inwardly. In one embodiment, the outer portion side surfaces are tangent to the inner portion arcuate surfaces and, in another form, the outer portion planar side surfaces intersect the arcuate side surfaces of the inner portion of the compression section. The distal tip of the ribs, in one form, is circular concentric with the side surfaces of the inner portion. In an alternative disclosed form, the tip surface is planar transversely to the rib.

Abstract: A toothed belt and method of manufacturing the same wherein the opposed ends of a tooth covering fabric are stitched with an interposed rigid element disposed within the stitching. The rigid element is used to accurately locate the joint of the fabric with respect to the tooth molding groove, at least during a subsequent tensile cord winding step which normally tends to displace the fabic joint. The joint may be accurately located as desired with respect to the mandrel or mold. Different structure for holding the ends of the rigid element are disclosed. The rigid element may be removed prior to the rubber vulcanization step during which step the wrapped tensile cord effectively maintains the fabric joint at the desired location.

Abstract: A method for making a belt for use in papermaking includes a series of steps. A sheet of uncured urethane is wrapped on a polished mandrel. A woven fabric sleeve to serve as a supporting carcass is placed over the first sheet and shrunk onto it. A second sheet of uncured urethane is placed over the woven fabric sleeve. A nylon web is wrapped tightly around the second layer and the entire wrapped mandrel is heated, curing the urethane sheets and entirely bonding the sheets to encapsulate the fabric sleeve. The nylon wrap is removed and the surface of the cured urethane is ground.

Abstract: A wide seamless endless belt. A belt comprising a wide seamless endless-belt-like sheet metal 10 to 50 .mu.m, and a lining layer made of flexible material provided on the inside surface thereof and carrying a mechanical force required for belt. This endless belt is used as a substrate of a photosensitive belt for an electrostatic photographic copying machine.

Abstract: A driving belt has a textile supporting element composed of multi-functional threads or yarns which contain plastic fibers of high breaking strength and heat-resistant natural fibers. The driving belt also contains an electrically conductive element. The supporting element is connected to a non-crosslinked plastic covering to form an asymmetric structure. The textile supporting element can be impregnated on the side facing away from the plastic covering. The electrically conductive element is either an electrically conductive filament in the multifunctional thread or yarn or an electrically conductive layer between the supporting element and the plastic covering. This asymmetric structure results in a favorable kinematic operating behavior and high efficiency, because the neutral bending plane of the belt comes to rest at a point very near the contact surface of an element to be driven.

Abstract: The flat drive belt has a layered build-up comprising at least one tensile layer (1) which has a modulus of elasticity of 20,000-250,000 N/mm.sup.2 and which is positively embedded between two thermoplastic hot-melt films (3) having a modulus of elasticity of 40-600 N/mm.sup.2. Friction layers or friction structures (4) of an elastomer material having a modulus of elasticity of 2-40 N/mm.sup.2 are built up on the hot-melt films (3).The individual layers of the flat drive belt can be produced with high precision and, as a composite, form a sheet-like structure which is very regular with respect to thickness and weight per unit area. The starting material, produced as meter ware, for the flat drive belt can be cut without effort by the user from rolls and can be joined under the action of pressure and heat into a continuous form, without thickenings and joint gaps, in the way required for the kinematic behavior of fast-running drive belts.

Abstract: A V-belt and method of making the same wherein a joint between opposite ends of the rubber portion of a belt preform is offset a preselected distance from one or more joints of fabric bonded to at least one of the inner and outer surfaces of the belt. The rubber and fabric are cut in making the preform suitably to have juxtaposition of the opposite ends thereof when wrapped about a mandrel in forming a belt sleeve from which the final V-belts are formed. Where the final belts are W-belts, a similar manufacture of the outer portion of the belt is effected. The fabric-covered portion of the belt may be cogged and the preselected spacing of the rubber and fabric joints is at least the pitch of the cogs. The fabric is preferably stretchable fabric.

Abstract: A double-acting power transmission belt having a plurality of elastomeric teeth positioned along both its inner and its outer peripheral surfaces, each such tooth possessing a certain spring rate, and inner and outer jackets, respectively, formed over the teeth and over the land portions between the teeth at each of the inner and outer peripheral surfaces, said inner jacket cooperating with the associated teeth such that the spring rate of each jacketed tooth on the inner one of the peripehral surfaces is from 1.2 times to 3 times the spring rate of a corresponding non-jacketed tooth.

Abstract: A power transmission belt for transmitting high loads having an elastomeric looped flat belt portion having a longitudinally extending tensile cord and defining an outer surface and an inner surface, and a plurality of longitudinally extending spaced blocks mounted to the outer and inner surfaces respectively of the flat belt portion. Each block is formed of a core and a fabric wrapped around the core. In one embodiment, the block is secured to the flat belt portion by bolts extending therethrough. The fabric of the blocks may be treated with different materials, such as rubber, synthetic resins, and the like. The core may be formed of an elastomeric material. The flat belt portion may be provided with one or more layers of fabric.

Abstract: A banded polymeric endless power transmission belt and method of making same are provided wherein such belt comprises a plurality of laterally spaced belt elements and each of the elements has fabric material defining the exposed surface thereof and a tie band interconnecting the elements with the tie band comprising fabric material; and, the fabric material defining the exposed surfaces and the fabric material comprising the tie band is a single piece of fabric material with such single piece of fabric material having a first portion bonded against top surfaces of the elements, a second portion covering the remaining exposed surfaces of the elements, and a third portion overlying the first portion so that the tie band comprises two layers of the single piece of fabric material.

Abstract: A wrapping transmission for effectively providing a transmission power by means of a pressing force of a wrapping belt against a transmission belt which travels from a driving pulley to a driven pulley, without expanding the transmission belt to excess. The wrapping belt is a woven cloth, on at least its surface, having a reduced friction factor so that wear of the transmission belt decreases and frictional heat between the wrapping belt and the transmission belt is reduced, thereby minimizing the loss of transmission power.

Abstract: A power transmission belt having a plurality of teeth of elastomeric material positioned along a peripheral surface of said belt, each possessing a predetermined spring rate, and a fabric cover formed over the teeth and over the land portions between the teeth, said fabric cover cooperating with said teeth such that the spring rate of each fabric covered tooth is greater than 1.2 times and less than 3 times the spring rate of such tooth alone.

Abstract: A covered V-belt having reduced coefficient of friction sides and a method for making the same are provided. The outer cover of the belt of this invention comprises a metallic material incorporated with the elastomeric material of the cover, which material is so incorporated either by depositing a thin film of the material onto a finished belt or by mixing a finely divided metallic material into the elastomer.

Abstract: A covered V-belt having reduced coefficient of friction sides and a method for making the same are provided. The outer cover of the belt of this invention comprises a metallic material incorporated with the elastomeric material of the cover, which material is so incorporated either by depositing a thin film of the material onto a finished belt or by mixing a finely divided metallic material into the elastomer.