Abrégé

Two embodiments of a false tooth limit the damage to a toothed belt and of a bearing layer of a base of the toothed belt, which in general comprises cables or textiles. The false tooth comprises a longitudinal bar and a bushing which extends transversally from the longitudinal bar. In the first embodiment the longitudinal bar is tapered towards a free end of the bushing while in the second embodiment the longitudinal bar is profiled, i.e., has a flank for contacting the toothed belt which is convex towards the outside when viewed in transversal section. The false teeth are advantageously applied on toothed belts comprising grooves which cut the teeth, enabling a reduction of the thickness of the tooth during the winding. A method and a semi-finished workpiece are also disclosed.

Classes IPC  ?

• F16G 1/28 - Courroies de transmission avec une surface de contact de forme particulière, p. ex. à dents
• B65G 15/42 - Courroies ou porte-charges sans fin analogues en caoutchouc ou en matière plastique avec nervures, stries ou autres saillies superficielles

Abrégé

The invention relates to two embodiments of a false tooth (10, 100) which limit the damage to the toothed belt (1) and, in particular, of the bearing layer (21) of the base (2) of the toothed belt (1), which in general comprises cables or textiles. The false tooth (10, 100) comprises a longitudinal bar (11, 111) and a bushing (15, 115) which extends transversally from the longitudinal bar (11, 111). In the first embodiment the longitudinal bar (11) is tapered towards the free end (18) of the bushing (15) while in the second embodiment the longitudinal bar (111) is profiled, i.e. has a flank for contacting the toothed belt (1) which is convex towards the outside when viewed in transversal section. The false teeth are advantageously applied on toothed belts comprising grooves (6) which cut the teeth, enabling a reduction of the thickness of the tooth during the winding. A method and a semi-finished workpiece (9) are also described.

Classes IPC  ?

• F16G 1/28 - Courroies de transmission avec une surface de contact de forme particulière, p. ex. à dents
• B65G 15/00 - Transporteurs comportant des surfaces porteuses de charges sans fin, c.-à-d. des tapis roulants ou autres systèmes équivalents, auxquelles l'effort de traction est transmis par des moyens différents des éléments d'entraînement sans fin de même configuration

Produits et services

Chain supports of metal; Recirculating ball screws and nuts; Pulleys of metal, Pulleys of cast iron or aluminium, toothed belts strengthened by means of wire strands; Connections of metal for belts. Transmission belts, toothed transmission belts; Chains, ball bearings, other than for land vehicles; Grooved pulleys; Timing belt pulleys; Belts for conveyors; Toothed bands; Roller transmission chains. Fittings of rubber, joints of rubber, coverings of natural rubber, rubber, silicone rubber.

Abrégé

The invention relates to a cogged belt for conveying articles and/or for power transmission, and an apparatus for realization thereof. The cogged belt (30, 50) comprises: a prefabricated belt (8) comprising a textile or a meshed net; and a covering (26) made of a thermoplastic or heat-hardening material fixed in a single body by fusion to the prefabricated belt (8) and substantially entirely covering a side of the prefabricated belt (8), the covering (26) forming a cogged profile (43). The cogged belt (30, 50) can further comprise at least a cord-shaped reinforcing core (61) at least partially incorporated in the covering (26). The apparatus comprises: a cogged pulley (2) activated by actuator organs; two lateral sides (3, 4) fixed to heads of the pulley (2); a contrast belt (5) facing a circular sector of the pulley (2); a supply device (6) of molten thermoplastic or heat-hardening material; a first station (7) for supplying a prefabricated belt (8), and an additional second station (60) for supplying at least a reinforcing core (61).

Classes IPC  ?

• B29C 43/28 - Moulage par pressage, c.-à-d. en appliquant une pression externe pour faire couler la matière à moulerAppareils à cet effet pour la fabrication d'objets de longueur indéfinie en incorporant des parties ou des couches préformées, p. ex. moulage par pressage autour d'inserts ou sur des objets à recouvrir

Abrégé

Belt piece, of the type which can be closed as a loop and usable for the transport of articles and/or for power transmissions, which comprises a central body (80) and two restrainable ends (2), (3), which: extend in parallel to the longitudinal axis of the belt piece (1); have transverse dimensions smaller than the ones of the central body (80); and at longitudinal sides (81), (82) have complementary coupling profiles (4), (5) comprising a plurality of first (6) and second portions (7). These portions are arranged in mutual contact when the ends (2), (3) are coupled and press the one against the other in case a longitudinal traction effort is applied to the belt piece (1), closed as a loop, to prevent the ends (2, 3) from sliding in longitudinal direction. It is further disclosed a method for obtaining a closed looped belt which uses a belt piece (1), comprising the steps of: approaching the ends (2), (3) according to a direction orthogonal to the extension one of the belt piece (1), until they are restrained; and fixing the ends (2), (3) with respect to each other by means of melting thermoplastic material or by applying small blocks.

Classes IPC  ?

• F16G 3/10 - Assemblage des courroies par couture, collage, vulcanisation ou procédés analoguesAdaptations structurales des extrémités de courroie à cette fin
• F16G 3/08 - Agrafes de courroies, p. ex. pour courroies de transporteurs consistant en plaques et boulons filetés ou rivets

Abrégé

The invention relates to a cogged belt for conveying articles and/or for power transmission, and a method and an apparatus for realisation thereof. The cogged belt (30, 50) comprises: a prefabricated belt (8) comprising a textile or a meshed net; and a covering (26) made of a thermoplastic or heat-hardening material fixed in a single body by fusion to the prefabricated belt (8) and substantially entirely covering a side of the prefabricated belt (8), the covering (26) forming a cogged profile (43). The cogged belt (30, 50) can further comprise at least a cord-shaped reinforcing core (61) at least partially incorporated in the covering (26).

Classes IPC  ?

• B29D 29/10 - Courroies de transmission de section transversale trapézoïdale
• B29C 43/22 - Moulage par pressage, c.-à-d. en appliquant une pression externe pour faire couler la matière à moulerAppareils à cet effet pour la fabrication d'objets de longueur indéfinie
• B29C 47/02 - en incorporant des parties ou des couches préformées, p.ex. moulage par extrusion autour d'inserts ou sur des objets à recouvrir
• F16G 1/16 - Courroies de transmission en matière plastique avec renforcements liés par la matière plastique
• F16G 5/20 - Courroies en V, c.-à-d. courroies à section décroissante avec une surface de contact de forme particulière, p. ex. dentée

Abrégé

Belt piece, of the type which can be closed as a loop and which can be employed for the transport of articles and/or for power transmissions, comprising two ends (2, 3), which can be connected with respect to each other, which: extend transversely or in parallel to a transverse section of the belt piece (1 ),- and have complementary coupling profiles (4, 5) respectively comprising at least a first (6) and a second portion (7), which are mutually arranged in order to contact each other when the ends (2, 3) are coupled together and to press the one against the other in case a longitudinal traction effort is applied to the closed looped belt piece, preventing the same ends (2, 3) from sliding in longitudinal direction. Method for obtaining a closed looped belt employing the belt piece (1) comprising the steps of : approaching the ends (2, 3) of the belt piece (1 ) and fixing the ends (2, 3) with respect to each other by means of melting a thermoplastic material or by applying a small block.

Classes IPC  ?

• F16G 3/08 - Agrafes de courroies, p. ex. pour courroies de transporteurs consistant en plaques et boulons filetés ou rivets
• F16G 1/28 - Courroies de transmission avec une surface de contact de forme particulière, p. ex. à dents