Abstract: Cable lead-through device includes a frame-shaped mounting member open at one side thereof, a cable lead-through element formed of at least one substantially parallelepipedal block of foamed plastic material surrounding a respective cable and received in the mounting member, and a retaining member for locking the open side of the frame-shaped mounting member, the cable lead-through element having an outer dimension limited by the mounting member, the substantially parallelepipedal block being of one-piece construction and being formed with a bore extending along an axis of the block, as well as with a slit extending alongside the bore for accommodating a cable introducible therethrough into the bore.

Abstract: A device for detecting the rotational speed of a motor by a first rotational speed sensor and at least a second rotational speed sensor and a switch unit connected to the rotational speed sensors, the switch unit selecting signals from one of the sensors within a respective given rotational speed range.

Abstract: Ink duct for offset or letterpress printing machines has an ink metering device by which a respective ink gap is adjustable zonewise in the axial direction of an ink duct roller. The ink metering device has metering elements pressable against the ink duct roller through the intermediary of a foil covering the metering elements, the foil being fastened so as to be movable tangentially to the ink duct roller. A device is provided for holding the foil, and an adjusting device is coupled with a motorized drive an engageable with the foil holding device for progressively moving the foil tangentially to the ink duct roller at a substantially uniform feed rate so as to dispose succeeding locations of the foil at a given distance from the ink duct roller corresponding to the width of the respective ink gap.