Abstract: A tubular sleeve (2) having a toothed inner surface (2a) is operatively mounted on rollers (12, 13) which rotate the sleeve (2) transversely to the extension of the teeth (5). photochromatic sensor (22) which is movable parallel to the rollers (12, 13) detects the presence of possible separation areas (9) between the sewn together end edges (6a, 6b) of a lining fabric (6) applied to the toothed surface (2a) of the sleeve (2), the end edges (6a, 6b) being chromatically differentiated from the elastomeric material (4) and from each other. An electronic processing unit (25) carries out the identification and storage of the position of the separation areas (9) detected by the photochromatic sensor (22).

Abstract: A process and apparatus for identifying defects within the structure of a tubular sleeve used to make toothed belts, the sleeve, having a toothed inner surface 2a, is operatively mounted on rollers 5, 6 operable in rotation to move the sleeve transversely to the extension of the teeth 3. An ultrasonic emitting and receiving member 15 movable parallel to the rollers 5, 6 detects the presence of structural cavities 3a in the sleeve. An electronic processing unit 20 carries out the identification and memorization of the position of the structural cavities 3a on the longitudinal extension of the sleeve 2.

Abstract: An apparatus and a method for inspection of the toothed configuration of an elastomeric tubular sleeve which will later be cut into short lengths to produce toothed driving belts. A tubular sleeve (2) having a toothed inner surface (2a) is operatively mounted around rollers (5, 6) operable in rotation to move the sleeve transversely to the direction of the teeth (3). A reading member (15) movable parallel to the rollers (5, 6) detects, through the repeated reading of the height of the toothed surface (2a) passing under a given read point, the transverse outline of the individual teeth (3), to enable comparison with geometric parameters stored in a processing unit (20). The translation speed of the sleeve (2) is identified by measuring the time necessary to the passage of two characteristic points of two contiguous teeth (3). Assigned to each height value detected by the reading member (15) is a corresponding distance value from one of the characteristic points of the teeth (3).