Abstract: A sheet delivery mechanism for a sheet-fed printing machine which is adapted to reduce changes in the position of sheet material in a stack during a stack changeover operation and which facilitates the formation of a stack with properly aligned edges. The sheet-delivery mechanism includes at least one length adjustable edge guide 16 supported between a stack support plate 14 and a cross element 15 which can be detachably connected to the frame of the sheet delivery mechanism.

Abstract: A sheet delivery mechanism for a sheet-fed printing machine which is adapted to reduce changes in the position of sheet material in a stack during a stack changeover operation and which facilitates the formation of a stack with properly aligned edges. The sheet-delivery mechanism includes at least one length adjustable edge guide 16 supported between a stack support plate 14 and a cross element 15 which can be detachably connected to the frame of the sheet delivery mechanism.

Abstract: An apparatus and method for feeding a stream of underlap-imbricated sheet-like printing substrates to printing machine, the apparatus comprising a conveying table for conveying the stream in a conveying direction toward the printing, a source of compressed air, and at least one blowing device coupled to the source of compressed air, the blowing device being disposed in a region of the conveying table adjacent to printing machine, and including at least one opening disposed to direct compressed air beneath the imbricated stream in a direction opposite to the conveying direction.

Abstract: An apparatus for cleaning a roller nip in rotary printing machines, which is filled with a fluid, includes at least one nozzle arranged above the liquid in the nip with the nozzle oriented at an angle (.alpha.) with respect to the longitudinal direction of the nip so as to be directed towards the fluid. Blowing air is fed to the nozzle via a control valve and causes the fluid to flow along the nip and off at least one end of the rollers.

Abstract: A method and system are provided for aligning the lateral edge of sheets fed to a printing press. The lateral position of a sheet is detected. A slidable suction device beneath the sheet is operated to pull the sheet toward a lateral abutment at a constant speed, the suction being applied at an individual time for each sheet in accordance with the detected position. Suction pressure is released when the sheet reaches the side lay, such that suction pressure is only applied for the time necessary to place the sheet in proper registration.