Abstract: A roller driven device for roller conveyors includes a cylindrical and tubular roller configured to rotate around its geometric axis, and having at each end a respective first lateral wheel and a second lateral wheel. At least the first lateral wheel has a tubular cylindrical element having at its end facing the second lateral wheel a first flange and at the opposite end a second flange. The device further includes a ring whose axial length ranges from two thirds to one twentieth of the axial distance between the first flange and the second flange of the first lateral wheel. An end of the ring is positioned between the first flange and the second flange and the end is fixed to the outer surface of the roller, where the end portion of the roller is fixed at the central hole of the second flange.

Abstract: A roller driven device for roller conveyors includes a cylindrical and tubular roller configured to rotate around its geometric axis, and having at each end a respective first lateral wheel and a second lateral wheel. At least the first lateral wheel has a tubular cylindrical element having at its end facing the second lateral wheel a first flange and at the opposite end a second flange. The device further includes a ring whose axial length ranges from two thirds to one twentieth of the axial distance between the first flange and the second flange of the first lateral wheel. An end of the ring is positioned between the first flange and the second flange and the end is fixed to the outer surface of the roller, where the end portion of the roller is fixed at the central hole of the second flange.

Abstract: A process for making a roller for conveying products along a predetermined path in an industrial installation, where a portion for rotationally driving the roller includes a tubular element and is associated with a rotatable roller support of the same roller in the form of a long tubular body. According to the process, the tubular drive element is connected to the tubular supporting body with glue.

Abstract: A direct feeling gage for the measurement of the sizes of moving workpieces with intermittent contact between the feelers and the workpiece including a hollow cylindrical shell defining a fluid tight space adapted to house both a portion of a mobile arm to one end of which is attached feelers which supports a mobile element of a transducer and the transducer itself, the space being filled by a viscous fluid adapted to damp the mobile arm movement and being provided with sealable openings. The openings comprise fill holes, holes for the passage of the mobile arm and holes for the passage of electrical conductors connected to the transducer. The holes for the passage of the mobile arm being sealed through resilient gaskets.