Abstract: A method and device allowing a driver of a handling machine of the forklift type to position and introduce, in complete safety, the forks of the machine under a load to be handled. A light-beam that projects a luminous mark onto the load to be handled informs the driver of the relative position of the forks with respect to the load to be handled. The light-beam is activated and adjusted depending on the different steps of handling and inclination of the forks, which, for their part, are identified solely on the basis of the measurement of the acceleration acting on the forks. The device, which is installed quickly and protected effectively against collisions, has a high degree of operational autonomy. It improves working conditions and reduces product losses.

Abstract: A method for producing plaster plates (44), according to which two fine cardboard-covered sheets of paper (8, 9) enclose a plaster-based hydraulic binder (10) in a shaping device (13), creating a composite band (45) that is hardened on one or several hardening bands (14, 15), the edges of said hardening bands (14, 15) being provided with two bands used for tapering in the horizontal direction.

Abstract: A board-conveying unit includes a board conveyor that defines a path; and a board deviation detection circuit, which includes a contact switch; in which unit the contact switch comprises at least one contact element extending along the path and is able to move in an oblique direction relative to the path, in which the first conductor is designed to be displaced by a board as said board overlaps another board.

Abstract: The invention relates to a method of producing plaster boards (12) in which two bound sheets of paper, namely one cream paper (3) and one grey paper (4), enclose a plaster-based hydraulic binder (2) in a former (7), thereby creating a composite strip (10) which hardens on two hardening strips (8 and 9), said strips having two horizontal tapering strips disposed along the edge thereof. The invention consists in: shaping the cream paper (3) along emboss lines (20); providing stiffening slots (23) on either side of the emboss lines (20); reinforcing the mechanical strength of said emboss lines (20) by covering same with a coating (15); allowing the emboss lines (20) to exceed the aforementioned former (7) and the hardening strips (8 and 9) and generating the double slope imprint (19); and, subsequently, cutting the composite strip (10) to the right and at the middle of each double slope imprint (19).

Abstract: A method for producing plaster plates (44), according to which two fine cardboard-covered sheets of paper (8, 9) enclose a plaster-based hydraulic binder (10) in a shaping device (13), creating a composite band (45) that is hardened on one or several hardening bands (14, 15), the edges of said hardening bands (14, 15) being provided with two bands used for tapering in the horizontal direction.