Abstract: A quick-disconnectable device with a screw piece, a first threaded part and a second threaded part, the threaded of which fits with the first threaded part, wherein the screw piece has a straight guide for the first threaded part, and the screw piece has a radial bearing and an axial bearing for the second threaded part, the longitudinal direction of the straight guide and the axis of rotation of the radial bearing are arranged parallel to one another, the two threaded parts are guided at a distance at which the mutual engagement of the two threaded parts is possible, the second threaded part has an external thread, and is equipped with a recess which completely interrupts the engagement of the threads at least in a specific rotary position An embodiment as a compact light and simple quick-acting clamping means for variable clamping geometry for articles to be measured on automatic 3D-measuring machines or as a spindle drive with high-speed disengagement.

Abstract: A covering device for a side-lay opening formed in a feed table of a sheet-processing machine and disposed transversely to a sheet-transport direction, wherein a bottom edge of at least one side lay for laterally aligning sheets travelling through the sheet processing machine in the sheet-transport direction dips into the side lay opening to a location below the surface of the feed table, a holder for the side lay being disposed on a guide and being adjustable transversely with respect to the sheet-transport direction, and cover web segments mutually juxtaposed and in alignment with the surface of the table being disposed adjacent the side lay for covering the side-lay opening, includes a spring device for bracing the cover web segments and biasing them in a direction perpendicular to the surface of the feed table, a sliding pad attached to the holder for the side lay, the sliding pad, in vicinity of the side lay, being actuable from above on the cover web segments for pressing the latter against the spring b

Abstract: A device for controlling feeder blowing air and feeder suction air in a sheet feeder of a printing machine having a sheet delivery, including a first control unit for controlling feeder blowing air and a second control unit for controlling feeder suction air, manual operating controls located both at the sheet feeder and the sheet delivery of the printing machine for separately actuating the first and the second control units by remote control, the first and the second control units, respectively, comprising a rotary valve with a valve housinhg and a valve member turnable in the valve housing and formed with a main opening for passing main air through the housing as well as with at least one auxiliary opening for residual air.