A belt extends along a longitudinal axis and is delimited by two sides opposite one another, by a back surface and by a front surface, which is opposite the back surface, is provided with at least one tooth and is designed to cooperate in contact with a transmission wheel; the belt has at least one wear indicator defined by an element comprising ferromagnetic material, which is embedded in an intermediate portion of the tooth.

The object of the invention is a belt-type traction means, which comprises a herringbone toothed belt, which has at least a tooth part and a support structure supporting the tooth part, which support structure comprises a plurality of reinforcement means in the longitudinal direction of the toothed belt. In the transverse direction of the toothed belt the toothed belt comprises two edge parts side by side and a center part between the edge parts connecting the edge parts, the spring constant of which center part in the transverse direction of the toothed belt is smaller than the corresponding spring constant of the edge parts. In addition, the object of the invention is a method for fabricating the aforementioned traction means and the use of the traction means in an elevator as well as an elevator provided with the aforementioned traction means.

The object of the invention is a belt-type traction means, which comprises a herringbone toothed belt, which has at least a tooth part and a support structure supporting the tooth part, which support structure comprises a plurality of reinforcement means in the longitudinal direction of the toothed belt. In the transverse direction of the toothed belt the toothed belt comprises two edge parts side by side and a center part between the edge parts connecting the edge parts, the spring constant of which center part in the transverse direction of the toothed belt is smaller than the corresponding spring constant of the edge parts. In addition, the object of the invention is a method for fabricating the aforementioned traction means and the use of the traction means in an elevator as well as an elevator provided with the aforementioned traction means.

A pulley contacting portion of a friction transmission belt is made of a rubber composition containing an EPDM mixture as a rubber component. The EPDM mixture as the rubber component includes a first EPDM with an ethylene content of 67% by mass or more and a second EPDM with an ethylene content of 57% by mass or less. A content of the second EPDM in the EPDM mixture is larger than a content of the first EPDM in the EPDM mixture. An average ethylene content of the EPDM mixture is 54% by mass or more and 59% by mass or less.

An endless belt is provided includes a compression section, a tension section, and a cover layer, together defining a longitudinal direction of the endless belt. The tension section has a plurality of tensile members extending at an angle of 0 to 45 relative to the longitudinal direction of the endless belt, and the tensile members are orientated a zig-zag pattern. In some cases, the plurality of tensile members extend along the longitudinal direction of the belt at an angle of 0. Each of the plurality of tensile members may be continuous or discontinuous. The tensile members may be laid in a plane substantially parallel with the longitudinal direction of the belt. The tension section may include two sets of a plurality of tensile members, where the first set tensile members are orientated in a first zig-zag pattern and the second set of tensile members are orientated in a second zig-zag pattern.

An endless belt is provided includes a compression section, a tension section, and a cover layer, together defining a longitudinal direction of the endless belt. The tension section has a plurality of tensile members extending at an angle of 0 to 45 relative to the longitudinal direction of the endless belt, and the tensile members are orientated a zig-zag pattern. In some cases, the plurality of tensile members extend along the longitudinal direction of the belt at an angle of 0. Each of the plurality of tensile members may be continuous or discontinuous. The tensile members may be laid in a plane substantially parallel with the longitudinal direction of the belt. The tension section may include two sets of a plurality of tensile members, where the first set tensile members are orientated in a first zig-zag pattern and the second set of tensile members are orientated in a second zig-zag pattern.

The present invention relates to a toothed belt containing tooth parts that are disposed at predetermined intervals along a belt longitudinal direction, a cord, and a back side that has the cord embedded therein, in which the cord contains a Lang-twisted glass fiber, an adhesion treatment layer, and an overcoat treatment layer, the overcoat treatment layer is formed on a surface of the adhesion treatment layer, the back side is composed of a rubber composition, and the rubber composition contains from 5 parts by mass to 20 parts by mass of a plasticizer based on 100 parts by mass of a rubber component.

The present invention relates to a toothed belt containing tooth parts that are disposed at predetermined intervals along a belt longitudinal direction, a cord, and a back side that has the cord embedded therein, in which the cord contains a Lang-twisted glass fiber, an adhesion treatment layer, and an overcoat treatment layer, the overcoat treatment layer is formed on a surface of the adhesion treatment layer, the back side is composed of a rubber composition, and the rubber composition contains from 5 parts by mass to 20 parts by mass of a plasticizer based on 100 parts by mass of a rubber component.

An object is to provide a polyurethane elastomer excellent in strength and surface smoothness. To attain the object, a urethane composition including a certain prepolymer, a plasticizer and a crosslinking agent is provided.

A method of manufacturing a power transmission belt includes: molding and vulcanizing an endless tension member layer in which a cord extending in a belt length direction is embedded; molding and vulcanizing a rubber member for a compressed rubber layer; and bonding together the tension member layer that has been vulcanized and the rubber member, that has been vulcanized, for the compressed rubber layer.