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: A flexible mounting (2) having a ring made of elastomeric material (3) fixedly engaged between an inner metal collar (4) and an outer metal collar (5) is mechanically stressed so that it undergoes a gradual elastic deformation corresponding to a relative displacement of 15 mm between the collars in a period of 20 seconds. Acoustic transducers (7) carry out the detection of the acoustic emissions occurring within the mounting itself and caused by structural instabilities arising in the flexible mounting while it is deformed. The acoustic transducers convert the acoustic emissions to electric signals that, after suitable amplification and discrimination, provide a reliable quality evaluation of the mounting being tested.

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).

Abstract: In the apparatus of this invention a plurality of cylindrical matrices 2 are used to form tubular sleeves of elastomeric material to be later cured and cut into short segments to be used as belts, usually toothed belts. A coiling station 8 places a reinforcing fiber helically around the entire length of the sleeve. The matrix having the coils is then turned to a vertical position by a transfer member 28 and transferred, by means of an adjacent rotating platform 6 to a winding station 9 for application of a sheet of elastomeric material over the thread. The matrix having the completed but uncured sleeve is then placed back on the rotating platform. The coiling station and the winding station each have a tilting member 34 or 43 with two pairs of arms 39 or 52 so that while a completed matrix is swung out of the working position, a fresh matrix is swung into position.