Conveyor belt jointing device and method for making same

A junction device for a conveyor band, said device being generally H-shaped, made up with a central part (1) or core, and with two pairs of wings (2, 2';

• 3, 3') approximately parallel, forming one single piece with the central part to which they are connected on each side of the central part, each of the pairs of wings adapted to be fixed to each end (E) of the conveyor band respectively inserted in a space between the wings of the two pairs of wings and approximately in abutment against the central part (1), two reinforcement elements (4, 4') being embedded in the flexible and elastic constituent material of the junction device, a first of said two reinforcement layers extending in the upper wing (2) of one pair of wings (2, 2') and in the upper wing (3) of the other pair of wings (3, 3'), a second reinforcement element (4') extending in the lower wing (2') of one pair of wings (2, 2') and in the lower wing (3') of the other pair of wings (3, 3'), the constituent material of the junction device adhering to the reinforcement elements (4, 4') wherein each of said reinforcement elements (4, 4') is made up of at least two layers (N' N", . . . ) of cables (6 or 7) having a high resistance to tensile stress and being inherently unextensible or slightly extensible, wherein said reinforcement elements are arranged in parallel planes, with a space provided between the layers, the cables (6 or 7) of each of the two layers (N', N", . . . ) being parallel to each other while the cables of a first of said two layers is perpendicular to the cables of a second of said two layers in a plan view, and cables of each of said two layers forming an acute angle .alpha. with the longitudinal direction.