Abstract: A sheet turning machine includes two slidable platforms, one of which is ascending while the other is descending, the upward travel of one of the platforms being synchronized with the downward travel of the other platform. The ascending platform is arranged between two vertical guide columns solidly fastened to a fixed chassis, while the descending platform is guided between two columns solidly fastened to a frame which tilts about the fixed chassis. The ascending platform is arranged under the field of action of a suction pump. A turning bridge is arranged above the descending platform and includes an endless conveyor belt which has a lower or return run part which diverges in a direction perpendicular to the columns guiding the descending platform. At the front of a roller whereat the endless belt returns, there is an air generator capable of maintaining a sheet of paper fixed to the belt while the sheet, travelling with the belt, passes from the upper run to the lower or return run.

Abstract: A sheet separation apparatus for separating one sheet-piece from a stack of sheets by a suction nozzle, characterized in that a vibration nozzle is provided in close proximity to the suction nozzle which sucks and exhausts air in turns at high speed from and to the stacked sheets to such an extent that said suction nozzle is not prevented by said vibration nozzle from sucking the uppermost sheet-piece in order to vibrate said sheet-piece.

Abstract: An apparatus for lifting a top sheet of material from a stack of material which comprises a generally flat foot member having an arcuately shaped channel cutout on its surface, said channel being in gaseous communication with an internal conduit, said internal conduit, in turn, being in gaseous communication with a source of gas under positive elevated pressure.

Abstract: The invention relates to a sheet feeding station for a magazine in which a plurality of individual sheets are located one against another, with a pneumatic pick-up roller rotatably mounted adjacent to the magazine and at that end of the magazine from which the sheets are destined to leave the magazine. The invention is characterized in that the roller is stationary in a precisely defined rest position at the start of a sheet-feeding feeding operation and remains in this rest position until it is sensed that a sheet is held against it by air pressure, the roller then rotating to feed the sheet so held, and continuing to rotate until the sheet-feeding operation has been completed.

Abstract: A sheet feeding device includes an elevator table for supporting a stack of sheets and a front sheet vacuum head for lifting and presenting the front edge portion of the top sheet to feed rolls. A rear sheet separator includes a pivoted vacuum shoe having a curved, vacuumized face for lifting the rear edge portion of the top sheet prior to directing a rear air jet forwardly between the top upper sheet and the underlying sheet, and prior to feeding of the sheet. A rearwardly directed air jet at the front of the stack cooperates with the rear jet to provide an air cushion beneath the top sheet. The rear sheet separator shoe is mounted on upper and lower links which are actuated by an air cylinder to roll the vacuum shoe along the sheet as the shoe lifts the top sheet.

Abstract: A suction head for feeding sheets in sheet-processing machines from a stacked pile of sheets to further sheet transporting means includes suction separation devices for lifting sheets off of a pile of sheets and transport suction devices for taking over the lifted sheet lifted by the suction separation devices and advancing the lifted sheet in a transport direction towards the further sheet transporting means. Control means are provided for moving the separation suction devices in the transport direction for at least part of the transport distance at the same velocity as the transport suction devices whereby the suction separation devices assist in transporting the lifted sheet over the aforementioned part of the transport distance.