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: Belts (10) are known which have a main body (11) having a smooth circumferential surface (12) on which a profiling is arranged. According to the invention the profiling is formed by an envelope body (13) surrounding the circumferential surface (12) of the main body (11). The belt (10) can thus transmit heavy driving and conveying forces. The belt (10) is therefore particularly suitable as a driving or conveyor belt.

Abstract: A power transmission belt having an endless body with a length and defining an elongate rib. The body has an inside, an outside, and laterally spaced sides. The rib has an exposed surface to engage with a cooperating pulley. At least a first portion of the exposed rib surface is formed by at least one of grinding and cutting. There is a second portion of the exposed surface that is neither cut nor ground during formation of the power transmission belt.

Abstract: A method of removing a portion of a cord that is exposed on the side surface of a power transmission belt. The method consists of the steps of providing an endless power transmission belt having inside and outside surfaces, laterally oppositely facing side surfaces, and a cord exposed on at least a part of one of the side surfaces. The belt is run in an endless path. The cord that is exposed on the part of the one side surface is ground as the belt is run without grinding the entirety of the one side surface of the belt. The invention is also directed to an apparatus for carrying out the above method and a power transmission belt having a portion of at least one of its side surfaces cut out/ground where a cord was exposed.

Abstract: An endless metal belt resistant to failure due to stress induced by bending contains an internal stress gradient of radially outward increasing compressive stress which opposes external stress applied to the belt. The belt can be made by an electroforming process.

Abstract: A conformable drive system for transporting a surface, such as an imaging surface, along a predetermined path of travel. An intermediate drive assembly, including an endless tape loop, operatively associated with a rotational drive source is provided. The endless tape loop is driven by the rotational drive source such that the tape loop, when positioned in frictional contact with the surface to be transported, induces transport movement of the surface. The tape loop includes a nonelastic support layer for preventing the tape loop from stretching, and also includes a frictional contact layer for providing substantial frictional forces between the tape loop and the surface being transported. The configuration of the conformable drive system provides sufficient contact pressure for imparting a substantially constant velocity vector to the transported surface for maintaining substantially constant speed control of the transported surface.

Abstract: Spaced headstock shafts are supported in common headstock walls such that their ends are inaccessible. The shafts are connected by an active timing belt. A spare timing belt is assembled around, but held out of contact with the shafts. At replacement time, the worn active belt is cut and removed and the spare belt is axially moved into its place. The drive may also include a belt tensioner.

Abstract: A continuously variable transmission in which power is transmitted between pulley sheaves by a series of thin, individually sized steel bands.

Abstract: A torque transmission system for effecting a driving connection between laterally spaced driving and driven shafts. A first drive member is mounted on the driving shaft, and a second drive member is mounted on the driven shaft. Each of the drive members has substantially identical pitch diameters. An endless flexible torque transmitter operatively connects the first and second drive member. A traveling insert band circumscribes and operatively engages one of the drive members at a time, and when the traveling insert band engages one of the drive members, the insert band is located radially inwardly of the endless flexible torque transmitters. The traveling insert band has leading and trailing ends located in substantially circumferentially opposed juxtaposition when the traveling insert band operatively engages one of the drive members. A mechanism is also provided selectively to derail the leading end of the traveling insert band from that drive member operatively engaged thereby.

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: An elastic driving belt stretched between two pulleys of fixed distance between centers and having a predetermined starting tensioning, undergoes a permanent elongation such that the residual elastic elongation has a percent value included between the detectable percent contraction values along the inner edge of the belt itself when the latter is respectively wound according to two predetermined bending lines, the residual elastic elongation being detected by measuring the residual tensioning value on the belt when the permanent elongation has occurred, and reading the elongation value corresponding to the residual tensioning value on a load-elongation graph relating to the belt.

Abstract: A highly durable, usually hydrolytically stable, drive belt for belt-driven tape cartridges is disclosed which is a thin continuous flexible loop of at least one polyetherurethane (preferably non-hygroscopic), which is both durable and strong. Preferably the belt will be composed of a composite of two separate polyetherurethane materials, one having a higher molecular weight and longer polymer chain length than the other. Also preferably, these two polyetherurethane materials will be blended to a homogenous mixture by melting both materials and blend the molten material and forming the belt from the resulting polymeric mixture. Optionally a single polyetherurethane polymer may be used as the material comprising the belt if that single material has the requisite properties of flexibility and durability.

Abstract: An improved cord for use in a power transmission belt. Before an adhesive stretching thermal fixation treatment, the cord, upon being heated, has a ratio of shrinkage percentage to shrinkage stress of less than 12% per g/d. After an adhesive stretching thermal fixation treatment, the heated cord has a ratio of shrinkage percentage to shrinkage stress of less than 6% per g/d.

Abstract: A belt drive has a pair of pulleys mounted for rotation in a common plane about parallel axes and a belt drivingly mounted about said pulleys, said belt being formed as a band of material having a curved transverse section.

Abstract: A mechanically variable transmission is provided by a novel arrangement of sheaves in combination with a power ring which can be utilized with a planetary device to smoothly varying output speed from maximum rotational speed in one direction to maximum speed in the opposite direction while passing through or maintaining zero output speed or any other speed in a forward or reverse direction while the input speed is varied or remains constant. The novel arrangement provides changes in the output speed over the entire range of engine power and under all load conditions since declutching is not necessary to shift gears allowing the engine to operate at a constant horsepower over the entire range of throttle settings and can enhance engine efficiency by allowing the engine to operate at the lowest possible speed and highest torque.

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: An elastically extensible flexible belt is provided which comprises an annular body of elastomeric material in which is embedded a plurality of elongated elements arranged along a surface corresponding to the position of the neutral axis of the belt. The belt is characterized in that each elongated element, at 1/10 of its ultimate tensile stress, has an elongation value able to balance a shrinkage value of the innermost surface of the belt, ranging between two limit values .epsilon..sub.1 .epsilon..sub.2 corresponding to the bending of the belt according to two pre-established curvatures. The first curvature is represented by a circumference whose radius r.sub.1 is equal to 60% of the radius R of the circumferential development of the annular body in correspondence of the elongated elements and the second curvature is represented by a circumference whose radius r.sub.2 corresponds to 35% of the radius R of the circumferential development of the annular body.

Abstract: A belt with rods for a rod belt conveyor. Transversely extending rods are secured to the side bands. In order not to have to further prepare the rods and the bands, yet to provide a secure connection, a holder extends about the rod ends, with the ends of the holder being held by clamps that are forced into the non-prepared bands. The clamps or securing elements could at the same time also be formed as holders and could thereby form the aforementioned holder.

Abstract: A belt (1), suitably closed into ring-shape and carried around at least two turn-round and/or driving cylinders (2, 3), is made of plastics material, particularly of polytetrafluoroethylene, or the like, or it is constituted by a fabric, particularly of glass, impregnated and/or coated with plastics material, particularly with polytetrafluoroethylene. Both longitudinal edges of the belt have an enlarged guiding bead (6) resting on the edge (4) of each end face of the turn-round cylinder and/or driving cylinder (2, 3) or on an annular step of said cylinder, or engaging into an annular groove in said cylinder. The enlarged guiding bead (6) may be constituted by a flexible core (5) incorporated within the respective longitudinal edge of the belt (1), and particularly enwrapped by a marginal portion (101) of the belt (1) which is folded over around the core (5) and is secured to said belt (1).

Abstract: Rubberized V-belts used in early friction drives suffered from excessive losses and short wear life. Chains composed of links and pins used in later drives generate excessive noise and develop maldistribution of stress among the several links. The present invention overcomes these shortcomings by providing a belt having a cable along each edge and spacers for holding the two cables apart. The cables form the "rails of a ladder". The spacers form the "rungs"--but are much closer together. The cables carry the circumferential load. The spacers carry the axial load developed by the sheaves on the cables.

Abstract: The invention relates to a tangential belt drive for a plurality of similar work units of a machine for the production of twisted or twined yarn. These units are subdivided into sections each having at least approximately the same number of work units and each driven through a tangential belt by an electric motor. Thereby, the number of work units in each section is established taking into account the required power and permissible belt stretch, so that the tangential belts have a considerably reduced width and thickness, compared to the ones commonly used. Further, the guide rollers of the tangential belts of neighboring sections are corotationally connected to each other.In order to improve synchronization and power transmission between sections, the contact angle is increased at the guide rollers and the drive pulleys. This may be done through the corresponding spatial arrangement of the drive pulleys with respect to the guide rollers or through use of an intermediate belt arrangement.

Abstract: The invention relates to a tangential-belt drive for a plurality of work units of the same kind, arranged at least in one row next to each other, of a machine for the production of twisted or twined yarns. The work units are divided into sections with at least approximately the same number of work units, each driven with an endless tangential belt. At least one electromotor is assigned to each section for driving the thereto pertaining tangential belt and guiding means for the tangential belt.In order to reduce the energy losses of such a tangential-belt drive, the width and thickness of the tangential belt used is considerably reduced, particularly to a width between 7 and 14 mm and a thickness between 2 and 2.7 mm. Size reduction becomes possible because the number of working units in each section is selected by considering the working capacity required by this number of work units and the acceptable belt stretch factor.

Abstract: Belt (1) of flexible polymeric material, in particular an elastomeric material, for the transmission of motion between two pulleys (6), comprising at least one longitudinal slot (2) defined by a bottom (3) and two lateral walls (4, 5). The belt passes from a first position in which the walls (4, 5) of the slot (2) are at a certain distance from the opposite lateral surfaces of the pulley, to a successive position during the winding of the belt around the pulleys, whereby the pull exercised on the inextensible reinforcing elements (7) of the belt leads to the approach of the slot walls to the opposite lateral surfaces of the pulley (6), resulting in the transmission of motion through friction.

Abstract: A continuously variable transmission has a driving pulley and a driven pulley each of which has a V-shaped groove in which sits the belt. The belt comprises a base portion of a rubber-like compound in which are imbedded a plurality of transverse metal pins each of which has exposed bent end portions whose tips are tapered to conform to the taper of the grooves and a plurality of cables imbedded in the base and extending longitudinally around the belt for stabilizing the length of the belt. The pulley walls are coupled to their corrseponding shaft by a resilient coupling which helps provide a desired clamping force on the belt and which includes a series of serrated members designed to exhibit a wedging action which provides the desired clamping force.

Abstract: This disclosure relates to an endless belt comprising a bed of elastic material and a plurality of longitudinally extending tension cords embedded therein. Each of the cords has its ends interconnected to form a junction, and the junctions of the cords are distributed over the length of said belt so that the junctions are longitudinally offset.The disclosure further relates to a process of producing such an endless belt.

Abstract: A drive system drives a plurality of whorls rotatable about respective whorl axes and having radially outwardly directed faces centered on the respective axes, forming a discontinuous whorl surface, and of a predetermined whorl width measured parallel to the respective axes. The system has an endless flat drive belt extending past the whorls generally perpendicular to their axes and having a first belt surface radially directly confronting the whorl surface and of a predetermined axial belt width measured parallel to the axes and pusher rollers bearing radially inward against the belt and urging the belt surface toward the whorl surface. A ridge is formed on one of the surfaces, radially engages the other surface, holds the rest of the other surface out of contact with the one surface except at the ridge, and is of a predetermined ridge width in contact with the other surface and measured parallel to the axes equal to at most one-third of the belt width.

Abstract: A power transmission V-belt comprising an endless belt, a plurality of V-shaped metal members and a plurality of intermediate members. The endless belt is mounted between drive and driven pulleys. The plurality of V-shaped metal members are arranged on the endless belt serially in the longitudinal direction thereof. Each of the V-shaped metal members is formed with a groove to provide a contacting surface in contact with an inner surface of the endless belt. The plurality of intermediate members are positioned at inner side of the endless belt. Each of the intermediate members is interposed between neighboring V-shaped metal members. Each of the V-shaped metal members has both sides in running direction of the endless belt and is formed with receiving surfaces for receiving one of the roller members. The receiving surfaces are in arcuate form. The radius of curvature of one of the receiving surfaces is substantially equal to that of the intermediate members.

Abstract: A V-belt transmission is provided which comprises two pulleys, an endless metallic V-belt operatively positioned between the two pulleys, a plurality of V-shaped members positioned with the V-belt located between the arms of the V and a stopper member for engaging the V-shaped member to prevent the V-shaped member from coming off of the V-belt. The V-shaped member includes grooves in a wall of the arms of the V at a position below or inside the plane of the inner surface of the V-belt. Further, the stopper member includes a middle portion which is positioned above or outside the plane of the outer surface of the V-belt and end portions for engaging the grooves at a point below or inside the plane of the inner surface of the V-belt. The groove in the V-shaped member is located on the outside of the arms of the V and has a first portion which extends in the lengthwise direction of the V-belt and a second portion which extends perpendicular to the surface of the V-belt.

Abstract: In order to provide a magnetic tape recorder where the magnetic tape and tape reels are driven by a drive belt with the capability of operating in temperature extremes, the drive belt is composed of silicone rubber that has been cured with a peroxide curing agent.

Abstract: Drive belts for tape cartridges featuring a base belt of low coefficient of elasticity with an elastomeric coating having a high coefficient of friction. Three examples of such belts are: (1) polyimide or polyester film base belts with a thin elastomeric film coating; (2) nickel, copper or steel base belts with a thin elastomeric film coating and (3) spirally wound filaments of high modulus of elasticity within an elastomeric matrix having a low modulus of elasticity, the filaments forming the base belt and the elastomeric matrix forming the coating on the base belt, holding the spiral loops in place.

Abstract: My invention relates to a method of power transmission using a new type belt drive. This belt drive will supply both axial motion with a speed reduction or increase and will also change a rotative force into a reciprocating force. All of this would be accomplished by a special flexible V-belt and special pulleys.

Abstract: A device for treating solid and/or liquid materials comprises a drum driven for rotation about a horizontal axis by means of an endless chain.An expensive toothed rim surrounding the drum is avoided, as it is possible that the chain engages a toothless portion of the drum periphery.

Abstract: A variable speed drive of the type having opposed, and parallel-arranged, frusto-conical shaped rollers over which a flat endless belt is trained. The belt is shiftable axially along the length of the rollers to produce an infinitely variable drive between the input and output shafts. The drive mechanism is enclosed in a case and the drive is adjusted from the outside of the case. The belt is properly assembled during assembly by utilizing a belt of known size and arranging for the location of the tapered roller shafts in the case in the precise manner so that the belt is brought to its final proper tension when the second roller is assembled in its preselected openings in the case.