Abstract: Transmission chain for a cone pully drive, with intercoupled links and pivot pins inserted through link openings of which the end surfaces cooperate with the cone surfaces, where between each pivot pin, on the one hand, and the opposite opening sides of a number of adjacent links, on the other, an intermediate piece with rolling contact action is inserted with a coupling rib for coupling the intermediate piece to the link opening sides, and of which the opposite-lying longitudinal side forms the rolling surface cooperating with the longitudinal side of the pin, the end of each intermediate piece being provided with a recess at right angles to the longitudinal axis running between the longitudinal sides through the coupling rib and opening out into the end face.

Abstract: A method of making elements with profiled cross-section from sheet metal for use in a driving belt by a rolling process, for providing a strip with a middle groove in longitudinal direction and by rolling the material continuously symmetrically with respect to that groove to two profiles punching out the elements on both sides of the middle groove, with their longitudinal direction in the direction of movement of the strip, according to lines which are located at accurately predetermined distances on both sides of the groove.