Abstract: A device for translationally maneuvering a structure able to move with respect to a fixed support, includes at least one rack and at least one output pinion which is driven by motor elements via a gear train borne by a chassis. At least one element of the gear train consists in a slave element borne by a shaft equipped with torque limiting elements collaborating with the chassis and having a limit torque which is determined so as to: immobilize the slave element in terms of rotation with respect to the chassis when its torque is below the limit torque to permit translational maneuvering of the mobile structure by the turning of the output pinion; and allow the slave element to rotate with respect to the chassis when its torque is higher than the limit torque, to avoid a static or dynamic overload being applied to the gear train.

Abstract: A device for translationally maneuvering a structure able to move with respect to a fixed support, includes at least one rack and at least one output pinion which is driven by motor elements via a gear train borne by a chassis. At least one element of the gear train consists in a slave element borne by a shaft equipped with torque limiting elements collaborating with the chassis and having a limit torque which is determined so as to: immobilize the slave element in terms of rotation with respect to the chassis when its torque is below the limit torque to permit translational maneuvering of the mobile structure by the turning of the output pinion; and allow the slave element to rotate with respect to the chassis when its torque is higher than the limit torque, to avoid a static or dynamic overload being applied to the gear train.

Abstract: Process for bleaching a chemical paper pulp to a brightness of at least 89° ISO, consisting in subjecting the pulp to a treatment sequence of several stages including a final bleaching stage with hydrogen peroxide in alkaline medium carried out in the presence of at least one stabilising agent and at a consistency of at least 25% by weight of solids, the stages preceding this final stage having purified the pulp so that its manganese content does not exceed 3 ppm by weight with respect to the solids and that the pulp has been delignified beforehand to a kappa number not exceeding 5.

Abstract: An output gear is on an elongate sheath capable of withstanding torsion between its ends. The sheath is equipped with a device for measuring the torque borne by the gear. The device for measuring the torque comprises a bar which extends through the sheath, fixed to the sheath at one end and equipped at the other end with a lever in contact with at least one linear displacement sensor, preferably of the inductive coupling type. The sensor can supply data to a central unit for collecting all data gathered from each output gear. The central unit comprises a computer for determining a mean torque value, and optionally, the weight of the platform to be established, and a controller for automatically controlling the plurality of maneuvering mechanisms.