Disconnectable and reconnectable coupling device

Disconnectible and reconnectible junction device for a conveyor band, said junction device having two flat elements of complementary shapes, each of the two flat elements having oblong strips directed respectively towards a front of each of the two flat elements and connected in a longitudinal direction to a rear part of the element, the two flat elements separated one from the other by notches of a shape complementary to those of the corresponding strips of the other element, the strips of each one of the elements having a plurality of transversal holes for linking stems, said linking stems being spaced apart in a transversal direction to the conveyor band and which are located approximately in the middle of the thickness of the strips, each of said plurality of transversal holes spaced one from the other in the longitudinal direction, in such a way that when the strips of the two elements are in an interleaved position, the plurality of transversal holes are in alignment,

• the junction device further comprising reinforcement means formed from at least two layers, said reinforcement means adhering to a constituent material of the junction device, wherein the reinforcement means comprises two layers located inside the junction device elements in two planes parallel one to the other and parallel to faces of the junction device, above and below the plurality of transversal holes 1 for the strip fastening stems and extending to the rear part of the elements, the reinforcement layers being flexible and providing in the longitudinal direction of the junction device a controlled extensibility conferring to the junction device first elasticity properties in combination to second elasticity properties of the constituent material of the junction device;
• wherein the two reinforcement layers (2) of each junction device element are arranged one against the other, being spaced apart at the location of the linking stems holes (1), in such a way that the linking stems holes are left open between the two reinforcement layers (2), spaced apart at this location, a transversal strengthening seam (3), or a transversal welded or sticked connection being formed at the intermediate front of the linking stems holes.

Disconnectible and reconnectible junction device for a conveyor band, said junction device having two flat elements of complementary shapes, each of the two flat elements having oblong strips directed respectively towards a front of each of the two flat elements and connected in a longitudinal direction to a rear part of the element, the two flat elements separated one from the other by notches of a shape complementary to those of the corresponding strips of the other element, the strips of each one of the elements having a plurality of transversal holes for linking stems, said linking stems being spaced apart in a transversal direction to the conveyor band and which are located approximately in the middle of the thickness of the strips, each of said plurality of transversal holes spaced one from the other in the longitudinal direction, in such a way that when the strips of the two elements are in an interleaved position, the plurality of transversal holes are in alignment,

• the junction device further comprising reinforcement means formed from a layer adhering to a constituent material of the junction device, wherein the reinforcement means comprise one single reinforcement layer, arranged generally in an area surrounding the median plane, this single reinforcement layer passing alternately above and below the transversal holes, the reinforcement layer being bent back around each one of the transversal holes located closest to each one of free ends of the strips;
• said single reinforcement layer providing in the longitudinal direction of the junction device a controlled extensibility conferring to the junction device first elasticity properties in combination to second elasticity properties of the constituent material of the junction device.

Disconnectible and reconnectible junction device for a conveyor band, said junction device having two flat elements of complementary shapes, each of the two flat elements having oblong strips directed respectively towards a front of each of the two flat elements and connected in a longitudinal direction to a rear part of the element, the two flat elements separated one from the other by notches of a shape complementary to those of the corresponding strips of the other element, the strips of each one of the elements having a plurality of transversal holes for linking stems, said linking stems being spaced apart in a transversal direction to the conveyor band and which are located approximately in the middle of the thickness of the strips, each of said plurality of transversal holes spaced one from the other in the longitudinal direction, in such a way that when the strips of the two elements are in an interleaved position, the plurality of transversal holes are in alignment,

• the junction device comprising reinforcement means formed from one layer adhering to a constituent material of the junction device, wherein the reinforcement means of each element of the junction device is formed by the reinforcement of the corresponding end of the conveyor band, uncovered of an elastomer material of the conveyor band, the said reinforcement means being arranged in each junction device element in such a way as to extend above the transversal holes of the various strips thus forming a first reinforcement layer, and after passing around one of the transversal holes located the most forwardly, then to extend below the transversal holes, thus forming a second reinforcement layer, the reinforcement end being applied against the first layer at a rear of the junction device element;
• said single reinforcement layer providing in the longitudinal direction of the junction device a controlled extensibility conferring to the junction device first elasticity properties in combination to second elasticity properties of the constituent material of the junction device.