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Disclosed is an improved laminated metallic belt consisting of at least two layers of an endless metallic band for use in a torque transmission device, which can transmit torque between two pulleys having variable effective radii, in combination with a plurality of metallic blocks which have surface

Disclosed is an improved laminated metallic belt consisting of at least two layers of an endless metallic band for use in a torque transmission device, which can transmit torque between two pulleys having variable effective radii, in combination with a plurality of metallic blocks which have surfaces contacting the innermost layer of the laminated metallic belt and are arranged along the laminated metallic belt. The metallic belt according to the present invention may be made of precipitation hardening martensitic stainless steel or maraging steel which have favorable properties as to toughness, mechanical strength and the adaptability for welding required for making an endless laminated metallic belt, but lack the surface hardness to ensure relatively favorable durability. The durability of the steel is improved according to the present invention by a nitride layer and/or an electroless nickel plating layer formed on the side edges of the endless metallic band. Optionally, the innermost and/or the outermost surface of the laminated metallic belt may be hardened in a similar manner.

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A laminated metallic belt consisting of a plurality of layers of endless metallic band and having an innermost surface defined by the innermost layer of endless metallic band, an outermost surface defined by the outermost layer of endless metallic band, and side edges formed by the side edges of the

A laminated metallic belt consisting of a plurality of layers of endless metallic band and having an innermost surface defined by the innermost layer of endless metallic band, an outermost surface defined by the outermost layer of endless metallic band, and side edges formed by the side edges of the endless metallic bands, for use in a torque transmission device in combination with a plurality of metallic blocks contacting the innermost surface of the laminated metallic belt and arranged along the laminated metallic belt, wherein: at least the side edges of each endless metallic band are hardened. A method of manufacturing a laminated metallic belt for use in a torque transmission device in combination with a plurality of metallic blocks, comprising the steps of: laminating a plurality of metallic band layers to form a belt having an innermost surface defined by the innermost metallic band layer, an outermost surface defined by the outermost metallic band layer, and lateral side edges defined by the side edges of the metallic band layers; and forming a nitride layer over the lateral side edges of the metallic band layers. A method of manufacturing a laminated metallic belt for use in a torque transmission device in combination with a plurality of metallic blocks, comprising the steps of: laminating a plurality of metallic band layers to form a belt having an innermost surface formed by the innermost metallic band layer, an outermost surface defined by the outermost metallic band layer, and lateral side edges defined by the side edges of the metallic band layers; and conducting an electroless nickel plating on the lateral side edges of the metallic band layers.