Abstract: A fabric layer includes a fabric and a crosslinkable elastomer, where the fabric defines a first side and the crosslinkable elastomer defines an opposing side. The fabric is coated with a crosslinkable elastomer and the combination is molded into a multiple tooth shaped fabric layer. In some aspects, the first side is an inner surface void of the crosslinkable elastomer. In some cases, the crosslinkable elastomer is crosslinked while the fabric layer is molded, while in some other cases, the crosslinkable elastomer is surface cured while the fabric layer is molded. The crosslinkable elastomer may be an alloy of crosslinkable polyethylene and EPDM. The fabric layer may be used as an outer layer of a synchronous drive belt, a timing belt, a poly-v belt, or offset tooth belt.

Abstract: The present invention is directed to timing belts having improved fabric adhesion to the tooth facing which can be achieved by the use of a combination of a RFL treated fabric and an EPDM body provided the RFL treatment or the body include ZDA or the RF latex is an X-HNBR latex.

Abstract: The present invention is directed to timing belts having improved fabric adhesion to the tooth facing which can be achieved by the use of a combination of a RFL treated fabric and an EPDM body provided the RFL treatment or the body include ZDA or the RF latex is an X-HNBR latex.

Abstract: The present invention is directed to the incorporation of functionalized polyethylenes, in amount of about 1% to 95% by weight based upon the weight of the total crosslinkable material, into ethylene alpha olefin elastomers, such as EPDM elastomer compositions, which are crosslinked by peroxides, which results in improved properties, such as hardness and modulus of elongation, and can result in improved higher abrasion resistance, wear resistance, coefficient of friction, tensile strength, and other properties through a broad temperature range, which are beneficial to power transmission products, such as power transmission belts.

Abstract: The present invention is directed to timing belts having improved fabric adhesion to the tooth facing which can be achieved by the use of a combination of a RFL treated fabric and an EPDM body provided the RFL treatment or the body include ZDA or the RF latex is an X-HNBR latex.

Abstract: The present invention is directed to the incorporation of functionalized polyethylenes, in amount of about 1% to 95% by weight based upon the weight of the total crosslinkable material, into ethylene alpha olefin elastomers, such as EPDM elastomer compositions, which are crosslinked by peroxides, which results in improved properties, such as hardness and modulus of elongation, and can result in improved higher abrasion resistance, wear resistance, coefficient of friction, tensile strength, and other properties through a broad temperature range, which are beneficial to power transmission products, such as power transmission belts.

Abstract: A mold for sequentially curing sections of a belt includes two end zones, a center zone, and transition zones between each end zone and the center zone. The mold is heated and/or cooled by heat transfer fluid flowing from intake manifolds through heat transfer cavities. The intake manifolds are preferably arranged perpendicular to the mold length. In the end zones and in the center zone, the heat transfer cavities are arranged substantially parallel to the length of the mold. The arrangement of the heat transfer cavities provides for a more controlled cure of the belt by allowing the center zone to maintain a consistent temperature throughout the center zone while allowing a cooler consistent temperature to be maintained in the end zones. The transition zones allow a steep temperature gradient from the cooler end zones to the hotter center zone. Heat transfer rates are adjustable without modification to the body of the mold.

Abstract: An endless power transmission belt having (1) a tension section; (2) a cushion section; and (3) a load-carrying section disposed between the tension section and cushion section; and the belt containing an elastomeric composition comprising (a) cross-linked elastomer; and (b) from 5 to 60 phr of chopped carbon fibers that have a sizing agent applied to the surface of the fibers.

Abstract: A splice joint is for joining first and second synchronous drive belt ends, of the belt type comprising a reinforcement material layer covering a base layer formed from a first thermoplastic material. The joint comprises a fused portion of the base layer of the first and second belt ends that define a splice region. At least one coating layer of thermoplastic material overlaps the reinforcement layer of the end portions in the splice region. The coating layer is comprised of a second elastomeric material intended to melt and penetrate into interstices of the reinforcement material layer while within the mold press. Migration of the base layer material through the reinforcement material layer to the pulley-engaging outer surface is thereby inhibited. The second elastomeric material composing the coating layer may be selected to provide desired frictional and wear characteristics.

Abstract: A mold for sequentially curing sections of a belt includes two end zones, a center zone, and transition zones between each end zone and the center zone. The mold is heated and/or cooled by heat transfer fluid flowing from intake manifolds through heat transfer cavities. The intake manifolds are preferably arranged perpendicular to the mold length. In the end zones and in the center zone, the heat transfer cavities are arranged substantially parallel to the length of the mold. The arrangement of the heat transfer cavities provides for a more controlled cure of the belt by allowing the center zone to maintain a consistent temperature throughout the center zone while allowing a cooler consistent temperature to be maintained in the end zones. The transition zones allow a steep temperature gradient from the cooler end zones to the hotter center zone. Heat transfer rates are adjustable without modification to the body of the mold.

Abstract: A splice joint is for joining first and second synchronous drive belt ends, of the belt type comprising a reinforcement material layer covering a base layer formed from a first thermoplastic material. The joint comprises a fused portion of the base layer of the first and second belt ends that define a splice region. At least one coating layer of thermoplastic material overlaps the reinforcement layer of the end portions in the splice region. The coating layer is comprised of a second elastomeric material intended to melt and penetrate into interstices of the reinforcement material layer while within the mold press. Migration of the base layer material through the reinforcement material layer to the pulley-engaging outer surface is thereby inhibited. The second elastomeric material composing the coating layer may be selected to provide desired frictional and wear characteristics.

Abstract: A system and method for detecting wear and the beginning of the mechanism of belt failure. A sensor (5) detects when a self tracking drive belt (1) tracks off center due to the asymmetrical wear (3) of the belt (1). The sensor (5) may be a simple mechanical or optical switch which is activated upon contact or a complex system which can detect the relative movement of the belt (1) when the belt (1) tracks to either side of the pulley (4). An audible or electrical signal indicates that the belt (1) needs to be changed.

Abstract: An endless power transmission belt having

Abstract: A method of producing synchronous belts having two or more tracks of teeth extending obliquely from the belt. The method includes forming an internal drum mold from a series of concentric rings, building a belt sleeve around the drum mold, vulcanizing the belt assembly, cutting the belt sleeve into widths and removing drum rings from the belt sections.

Abstract: A configuration for a synchronous drive belt and pulley combination wherein each belt tooth has at least part of its fore and aft flank surfaces shaped in cross-section as the arc of a circle the radius of which is centered on the pitch line of the belt a distance W apart. Each tooth-engaging pulley cavity has at least part of its fore and aft surfaces shaped in cross-section as the arc of a circle the radius of which is centered on the pitch circle. The tips of the belt teeth and the bases of the pulley cavities are relatively shaped such that upon engagement of the belt with the pulley compressive stress is exerted from each cavity base through each engaging belt tooth.