This disclosure relates to methods and apparatuses of employing belts for an angular drive. A twisted geometry is applied to a first free span of the belt. A sheave supports the first free span of the belt at a first extremity of the first free span and sheave is at least one of positioning and orienting the rotating sheave or the driven sheave so as to misalign a geometric centerline of the first free span of belt at a given fleet angle with respect to a second extremity of the first free span.

A frictional power transmission belt includes a compression rubber layer that includes a frictional power transmission surface at least a part of which can come into contact with a pulley and that is formed of a cured product of a rubber composition. On a surface of the frictional power transmission surface, a surface layer comprising a cured product of a rubber composition containing a polyvinyl pyrrolidone-based resin and an elastomer component is laminated.

A belt for power transmission or transport comprising a polyurethane belt body, wherein the polyurethane of the belt body is the reaction product of a urethane prepolymer and a diamine chain extender, and the urethane prepolymer is based on a polyether and a linear aliphatic diisocyanate. The belt has excellent hydrolysis resistance.

A basic fabric for an adhered fabric of a transmission belt, provided with an upper face and a lower face and having warp yarns in a longitudinal direction and weft yarns in a transverse direction is provided. The warp yarns have a predefined degree of elasticity and the weft yarns have a lower elasticity than the warp yarns. The weave of the basic fabric is Inverted Batavia weave.

A basic fabric for an adhered fabric of a transmission belt, provided with an upper face and a lower face and having warp yarns in a longitudinal direction and weft yarns in a transverse direction is provided. The warp yarns have a predefined degree of elasticity and the weft yarns have a lower elasticity than the warp yarns. The weave of the basic fabric is Inverted Batavia weave.

A toothed belt includes: a belt main body having a tooth portion and a groove portion alternately disposed at a fixed pitch in a longitudinal direction, and an outer portion disposed on the outer surface thereof; and a cord buried on a predetermined pitch line on the outer portion, in which the belt main body includes: a support layer, disposed under the cord and containing a thermoplastic polyurethane material; and a cured polyurethane elastomer in addition to the support layer, and in which the support layer is formed of a mixture of the thermoplastic polyurethane material and the polyurethane elastomer, which are integrally cured.

A toothed belt includes: a belt main body having a tooth portion and a groove portion alternately disposed at a fixed pitch in a longitudinal direction, and an outer portion disposed on the outer surface thereof; and a cord buried on a predetermined pitch line on the outer portion, in which the belt main body includes: a support layer, disposed under the cord and containing a thermoplastic polyurethane material; and a cured polyurethane elastomer in addition to the support layer, and in which the support layer is formed of a mixture of the thermoplastic polyurethane material and the polyurethane elastomer, which are integrally cured.

A power transmission belt and a method for manufacturing said belt. The belt includes: a backing layer made of a material with elastomeric behavior; a ventral layer made of a material with elastomeric behavior; a mechanical reinforcement means inserted between the backing layer and the ventral layer comprising a film with thermoplastic transformation surrounding the mechanical reinforcement means, said film comprising at least: a first component physically and/or chemically bonded to at least one component of the backing layer; a second component physically and/or chemically bonded to at least one component of the mechanical reinforcement means; and a third component physically and/or chemically bonded to at least one component of the ventral layer. The method for manufacturing said belt may advantageously use an anti-sticking means.

A power transmission belt and a method for manufacturing said belt. The belt includes: a backing layer made of a material with elastomeric behavior; a ventral layer made of a material with elastomeric behavior; a mechanical reinforcement means inserted between the backing layer and the ventral layer comprising a film with thermoplastic transformation surrounding the mechanical reinforcement means, said film comprising at least: a first component physically and/or chemically bonded to at least one component of the backing layer; a second component physically and/or chemically bonded to at least one component of the mechanical reinforcement means; and a third component physically and/or chemically bonded to at least one component of the ventral layer. The method for manufacturing said belt may advantageously use an anti-sticking means.

A transport, driving or pressing belt, comprising at least one belt material having a lower and an upper face limited by two longitudinal edges and two transverse edges running obliquely with respect to the main extension direction of the belt, the belt material being closed and the longitudinal edges being folded down, and a method for manufacturing a transport, driving or pressing belt. To ensure high tensile strength over the complete belt length and avoid an edge tearing of the first belt material at the longitudinal edges, the transverse edges of a first belt material lie against each other in abutting relationship, and a second belt material is arranged centrically on the first belt material at least in the region of the transverse edges. The second belt material here nearly covers a width of 50% of the first belt material and is centrically glued with the first belt material.