Abstract: A power transmission belt has an uneven surface of rubber which when the power transmission belt is wound around a flat pulley, comes in contact with the flat pulley. The uneven surface has projected parts each having a flat top surface.

Abstract: A friction drive belt has a pulley contact portion of a belt body, and at least the pulley contact portion is made of a rubber composition. Numerous pores are formed in a surface of the pulley contact portion of the belt body, and numerous small protrusions having an average height of 4-40 ?m are formed to protrude from the surface.

Abstract: An endless belt for power transmission is capable of efficiently improving the yawing attitude of the elements in a variable pulley. This endless belt for power transmission includes the elements and an annular band-like member for supporting the elements. The endless belt is winched between a pair of variable pulleys. Groove parts extending from the front surface of the belt in the forward movement direction to a predetermined position not reaching to the rear surface of the belt in the forward movement direction are formed in the side surfaces of the elements contacting with the belt sliding surfaces of the variable pulleys.

Abstract: In a friction drive belt B, at least a contact part 13 of a belt body 10 with a pulley is made of an elastomer composition. The contact part 13 of the belt body 10 with a pulley has a large number of cellular pores 15 formed in the contact surface with the pulley.

Abstract: A continuously variable belt drive transmission, including input and output pulleys each having axially opposed tapered surfaces, and an endless belt including a plurality of metal elements each having opposed side faces contacted with the respective tapered surfaces of the input and output pulleys. Each of the opposed side faces is formed with a plurality of microscopic projections and recesses arranged along a radial direction of the input and output pulleys upon being in contact with the respective tapered surfaces of the input and output pulleys. The tapered surfaces of at least the input pulley are formed with microgrooves that are radially spaced from one another and have a pitch not more than a width of each of the microscopic projections on the side faces of the metal element.

Abstract: Provided is a V-ribbed belt that can suppress generation of slippage when it is splashed with water, and generation of noise. A V-ribbed belt has a rib-forming surface with plural rows of ribs formed therein and extending in a belt longitudinal direction to allow the rib-forming surface to be brought into contact with pulleys when in use, wherein the V-ribbed belt has reentrant portions on the rib-forming surface to form a non-contact area that is held out of contact with the pulleys when the V-ribbed belt is driven, so that water is allowed to flow into the non-contact area when the V-ribbed belt is splashed with water.

Abstract: A flat belt that enables the degree of wear thereof to be visually or tactually determined is provided. There is provided a flat belt that has a surface contacting a pulley and a recess formed thereon for detecting wear.

Abstract: An image forming apparatus including a drive source for producing driving force; an image carrier driven by the driving force; and a driving force transmission apparatus for transmitting the driving force produced by the drive source to the image carrier, wherein the driving force transmission apparatus includes a first endless-shaped flat belt having a plurality of through holes along a travel direction thereof; and a rotation member having a plurality of projections to which said plural through holes of the first flat belt are fitted.

Abstract: A seamed, conformable belt including a substrate having first and second opposing substantially planar surfaces, a first end, and a second end, wherein the first end and the second end of the substrate form a first seam, and an elastomeric layer having a first end and a second end, wherein the elastomeric layer is adjacent and in contact with the first surface of the substrate and wherein the first end and the second end of the elastomeric layer form a second detachable, substantially planar seam.

Abstract: The present invention provides a method for making a seamless apertured belt comprising the steps of: (a) providing a strip of material having two opposing ends and having a length at least equal to a finished belt length; (b) providing an aperture pattern having a length substantially equal to the finished belt length, the pattern including a plurality of two-dimensional geometrical shapes, the pattern having opposing end edges which can be tiled together; (c) removing a pre-determined portion of each end of the pattern and joining the pre-determined portions to one another along the opposing end edges to form a re-etch pattern; (d) forming apertures in the strip corresponding to the two-dimensional geometrical shapes in the pattern, the strip remaining free of apertures in regions near each end comprising fusion zones; (e) fusing the ends of the strip to one another such that the fusion zones form a common fusion zone; and (f) forming apertures in the common fusion zone corresponding to the re-etch pattern.

Abstract: A drive belt for a continuously variable transmission having belt discs having an at least partially conical contact surface for enclosing a drive belt between pairs of said discs, which drive belt to this end comprises one or more transverse elements provided with converging side faces intended to come into contact with the contact surface of a belt disc and wherein one or more side faces possess a surface which has protuberances providing a profile, which surface has therein contact faces, defined by the protuberances, for coming into contact with the contact surface of a belt disc, wherein the profile is shaped such that on cross-sectioning parallel to the side face concerned, or after wear of the profile at or down to a level which is located at least thirty percent and at most seventy percent of the profile height beneath the initial profile height, the surface area effectively available for coming into contact with the contact surface of a belt disc lies within the range of forty to sixty percent with r

Abstract: A locking differential has a fixed drive dog and a movable drive dog. A locking actuator has a plunger drivingly connected to the movable drive dog. The plunger is movable in a first direction to a lock position in which the drive dogs are engaged and in a second, opposite direction to an unlock position in which the drive dogs are disengaged. A piston is connected to the plunger and disposed in a cavity in a housing. Movement of the piston in the second direction is imparted to the plunger when the plunger is in the lock position but the piston is movable independently relative to the plunger in the first direction when the plunger is in the unlock position. A pressurized fluid causes the piston, and thereby the plunger, to move in the second direction. A piston bias member biases the piston in the first direction, and a plunger bias member biases the plunger in the first direction. A related method of locking the differential is also disclosed.

Abstract: A device for transmitting motion comprises a flexible elastomeric element and at least one rigid element in surface contact with one another, wherein the surface of said flexible elastomeric element that comes into surface contact with said rigid element has been surface treated with a halogenated polyether.

Abstract: A magnetic tape cartridge incorporating a drive belt characterized by a pattern of recesses in the belt surface in contact with the magnetic tape which are used to provide traps for tape contaminants. Different types of patterns are used to eliminate tension variations which would otherwise occur as a consequence of tape contaminants during the projected life of the cartridge.

Abstract: An endless flexible seamed belt with a mechanically invisible seam and substantially equivalent in performance to a seamless belt is formed by joining two ends of material from which the belt is fabricated each end of which has a plurality of mutually mating elements in a puzzle cut pattern which are in interlocking relationship in at least one plane and which when joined mechanically enable the flexible belt to essentially function as an endless belt having a substantially uniform thickness.

Abstract: A drive belt for a belt-driven recording tape cartridge, wherein the drive belt has inside and outside major surfaces which comprise a plurality of bubble burst discontinuities. Processes for making drive belts with bubble burst discontinuities are also described.

Abstract: A process is disclosed for the manufacture of endless looped transfer belts having extremely low loss of registration over the length of the belt. The process comprises steps for creating the apertures in the belt with little center to center deviation, creating a splice joint for forming the endless loop, and joining the ends of the belt, utilizing apparatus specifically designed to provide indexing posts, registration posts and dimensioning plugs to insure accuracy in the finished belt.

Abstract: An endless elastomeric belt includes a plurality of longitudinally separated guide blocks each having a longitudinally extending slot in a tip portion thereof. The slot reduces the mass of the guide block at a location most effective for reducing acceleration forces generated in the belt at a position where the belt separates from the entrained wheels at high rotational speeds. Reducing the acceleration forces reduces fatigue failures tending to occur in the bond joint between the guide block and a belt body.

Abstract: Low noise timing belts for use in belt drive systems include either perforations cut into their thin segments or spiral grooves cut into their thick segments in order to allow air pockets to escape in all directions during teeth engagement of belts and pulleys, thereby reducing the noise generated in the process.

Abstract: Low noise timing belts for use in belt drive systems include either perforations cut into their thin segments or spiral grooves cut into their thick segments in order to allow air pockets to escape in all directions during teeth engagement of belts and pulleys, thereby reducing the noise generated in the process.

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: An endless power transmission belt construction and method of making the same are provided, the belt construction having opposed side edges and having an inner surface defining a plurality of longitudinally disposed and alternately spaced apart projections and grooves for meshing with a ribbed surface of a rotatable pulley or the like and defining a plurality of transversely disposed and alternately spaced apart projections and grooves that respectively extend between and to the opposed side edges, the longitudinal spacings between the transverse grooves or/and the depths of the transverse grooves being staggered so as to tend to reduce noise during normal operation of the belt construction with the pulley or the like.

Abstract: Transmission provided with a driving belt and V-shaped pulleys. The side faces of the transverse elements or the contacting surfaces of pulleys in a variable transmission are provided with enlarged straight or oblique grooves between ridges in order to improve the efficiency and to reduce the wear of the transmission.

Abstract: A flat belt transmission has two spaced flat pulleys and a flat belt reeved around the flat pulleys. Each pulley can have a plurality of crowns arranged in the width direction of the outer periphery thereof. The flat belt can be a plurality of belts with a narrow width, one for each of the crowns. The flat belt can be a single belt with a part extending in the longitudinal direction of the belt in its inner periphery. The flat belt can be used with the flat pulley of the above construction or a flat pulley having a single crown of its outer periphery. In addition, the plurality of crowns are formed on the outer periphery of the flat pulley so as to be spaced at the same distance from the center of rotation of the pulley, or the outer periphery of the flat pulley can be in the form of a circular arc to change height of the crowns.

Abstract: The invention relates to a precompaction belt for continuously operating belt-type prepresses for compacting preshaped sections from the particle mat passing through on a conveyor belt to produce particle boards, etc. The belt comprises a core of textile cord fabric with smooth outer PVC layers and with perforations at predetermined spacing.

Abstract: In an endless power transmission belt including a matrix made from an elastomer material, advantageously of the rubber type, and a longitudinal reinforcement of twisted cords, the reinforcement is chosen, with respect to its physical tension characteristics and its positioning in the matrix, so that the belt has an overall extension modulus sufficiently low so that it makes it possible to fit the belt, by exerting a tractive force, on the pulleys with which it cooperates and yet keeps a minimum appropriate tension after positioning so as to ensure satisfactory operation of the transmission which it equips.

Abstract: A link-type V-belt of relatively inflexible material including a first link having bifurcate ends and a second link having single ends which are pinned together by multiple pins in alternating fashion. Two pins are employed at each intersection between links and are semicylindrical for rolling contact between pins and for pivotal movement with the associated link. Broad transmission faces are associated with each link in inclined arrangement for conforming to a V-grooved pulley. Lubricant relief passages aid in the power transmission of the pulley by allowing lubricants to flow from the transmission faces of the belt. At the same time, the belt may be lubricated to further reduce internal frictions and sliding friction on associated pulleys. Informing the link having bifurcate ends, two link members may be positioned together with a spacer therebetween. Pins are calked in place to retain both the pin in position and the link members together.

Abstract: In a tape which is driven by an elastic pretensioned belt, discontinuities such as embossings in the surface of the belt promote the release of air from between the belt and the underlying tape, thus minimizing variations in tape tension and tape speed.