Abstract: A machine for processing printing material sheets, in particular a sheet-fed printing press, has a sheet transport drum for transporting the printing material sheets and at least one sheet supporting element. The sheet supporting element, which is formed with a sheet supporting surface, is compatible with the sheet transport drum, for supporting the printing material sheets in a first operating mode. When the machine is operated in the first operating mode the sheet supporting element is held attached to the sheet transport drum, and when the machine is operated in a second operating mode the sheet supporting element is stored in the machine detached from the sheet transport drum. A corresponding printing material processing machine is suitable for carrying out the novel method.

Abstract: A gripper for a cylinder or a drum of a sheet-fed rotary printing press, includes a gripper element adjustable relative to a gripper shaft carrying the gripper, the gripper element being disposed so as to be swivellable about a swivel point thereon for effecting an adjustment, the gripper element being formed with a concavely curved seating surface having a radius adapted to and smaller than the radius of the gripper shaft.

Abstract: A device for controlling vacuum applied to suction openings formed in a cylinder, the suction openings being connectable to a vacuum source via valves arranged in rows and assigned to the suction openings, includes a rotatable adjusting shaft carrying adjusting elements assigned to the valves, the adjusting elements serving to actuate the valves in a defined sequence when the adjusting shaft is rotated, the valves having adjusting bodies therein movable by the adjusting elements out of a first switching position of the adjusting bodies into a second switching position thereof, the vacuum applied to the suction openings being of different magnitudes in the first and the second switching positions; and a method for incrementally actuating the vacuum-controlling device.

Abstract: A cylinder of a rotary printing machine having an inner cylinder body includes an elastically deformable cylinder jacket formed as part of a circle, the cylinder jacket being substantially intrinsically rigid, and an adjusting device for acting upon the elastically deformable cylinder jacket so as to vary the outer diameter thereof, the adjusting device having a positioning part supported on and radially displaceable relative to the inner cylinder body for shifting the cylinder jacket jointly therewith in the same radial direction, and having a force deflector displaceable over a positioning travel distance derivable from the radial displacement of the cylinder jacket for acting upon the cylinder jacket so as to deform it.

Abstract: An adjustment device for adjusting the height of gripper impact strips in a sheet-guiding cylinder for a printing press having two diametrically opposing gripper bars disposed at the cylinder circumference and made up of gripper shafts, grippers and gripper impact strips, includes respective adjusting shafts provided for the gripper impact strips, a coupling connecting the adjusting shafts to one another and compensating for an axial adjusting movement of the adjusting shafts, and an actuating element actuatable from the cylinder circumference for adjusting the height of the gripper impact strip at at least one of the gripper bars.

Abstract: A sheet transfer device for a sheet-fed rotary printing press includes a registration correction device. The registration correction device deforms the leading edge of the sheet using a deformable gripper bridge system. The gripper bridge system includes a gripper bridge which extends continuously over the width of the sheet transport path. The gripper bridge is supported at each of its two ends by a pivotable support to allow the gripper bridge to assume a deformed shape similar to that of a simply-supported beam.

Abstract: Suction-type grippers for a sheet-transfer drum includes a sheet-supporting element having a sheet-supporting surface formed with a plurality of suction-air openings disposed along a region thereof to be covered by at least one sheet edge, at least one flexible planar member disposed adjacent to said sheet-supporting element at a side thereof facing away from the sheet-supporting surface thereof, the flexible planar member having a member for sealing at least some of the suction-air openings.

Abstract: Multi-way slide-type shutoff valve for suction air of suction-type grippers on a sheet-transfer drum, including a plurality of closing parts, linearly slidable in a housing for optionally closing air-inlet openings connected to intake ducts of the suction-type grippers, and for closing air-outlet openings connected to a suction-air source through the intermediary of a rotary valve, the closing parts having a cylindrical shape, at least some thereof being arranged adjacent one another and in coaxial alignment, and an operating device for displacing the closing parts, is provided with springs having spring constants coordinated with one another and being disposed at least between the adjacent coaxial closing parts, at least an outer one of the closing parts being connected to the operating device.

Abstract: A device for adjusting the position of suction-type grippers on a sheet-transfer drum, wherein the suction-type grippers are disposed basically along at least one generating line, are displaceable perpendicularly to a sheet-transport direction and are fixable, including a plurality of endless belts, the suction-type grippers being disposed on the endless belts.

Abstract: A device for adjusting the position of suction-type grippers on a sheet-transfer drum, wherein the suction-type grippers, disposed basically along at least one generating line, are displaceable perpendicularly to a sheet-transport direction and are fixably disposed, includes a multi-member differential worm-gear unit having output members secured against rotation relative thereto, the suction-type grippers being fastened to the output members, and precisely one rotational input member disposed on the differential worm-gear unit for simultaneously adjusting all of the suction-type grippers.

Abstract: Device for sheet-format adjustment of a sheet-transfer drum formed of sheet-holding segments displaceable in guides radially and in a rotational direction of the sheet-transfer drum, and having gripper devices for holding leading and trailing edges of sheets, the gripper devices being adjustable with respect to one another in an outer cylindrical surface of the sheet-transfer drum in the rotational direction thereof, the sheet-holding segments and the gripper devices being simultaneously adjustable for two sheets to be transported, includes guide discs disposed on both sides of the sheet-transfer drum and fixedly connected to a shaft of the sheet-transfer drum, the guide discs being formed with radial guide slots extending parallel to one another, and at least one guide element connected to a sheet-holding segment and being seated in each of the guide slots, and a respective control disc disposed on each side of the sheet-transfer drum and rotatable on the shaft of the sheet-transfer drum, the control disc be

Abstract: A suction-air control device for a rotatable sheet-transfer drum having suction-type grippers disposed thereon and having a journal with a rotationally symmetrical surface, includes a rotary valve disposed on the journal of the sheet-transfer drum for connecting the suction-type grippers to a stationary suction-air source. A stationary housing is provided for the rotary valve. A device controls a supply of suction air from the suction-air source to the suction-type grippers with a time lead or a time lag as a function of the rotational speed of the sheet-transfer drum. At least one suction-air bore extends from the interior of the journal to the surface thereof. One suction-air bore is connectable to the suction-type grippers. The rotationally symmetrical surface of the journal forms a sealing surface of the rotary valve.

Abstract: Device for adjusting the position of suction grippers on a sheet transfer drum for conveying sheets in a sheet-fed rotary printing press, at least some of the grippers being formed as suction grippers, at least one guide bar carried by the sheet transfer drum, holding elements mounted on the guide bar and having the respective suction grippers seated thereon, the suction grippers being manually displaceable along a generatrix of a cylindrical outer surface of the sheet transfer drum perpendicularly to a sheet conveying direction and being fixable thereon, includes a respective manually actuatable locking member connected to each of the holding elements for retaining the respective holding element in position on the guiding bar by frictional forces applied to the guiding bar at opposite sides of the respective holding element, the clamping element being an individual spring.

Abstract: Device for sheet-format adjustment of a sheet-transfer drum, formed of sheet-holding elements displaceable in guides in a rotational direction of the sheet-transfer drum and having at least two gripper devices for holding sheet leading and trailing edges, the gripper devices being adjustable relative to one another in an outer cylindrical surface of the sheet-transfer drum in the rotational direction thereof, the sheet-holding elements and the gripper devices being simultaneously adjustable for sheets to be transported on the sheet-transfer drum, includes resilient elements connected to adjacent sheet-holding elements on both sides of the sheet-transfer drum, the resilient elements having substantially identical spring constants.

Abstract: A device for actuating a clamping device on at least one paper-guiding cylinder in a rotary printing press, including a positioning unit having a device for applying a pressure medium thereto, a lever mechanism cooperatively engageable with the positioning unit, a device for remotely controlling a clamping device on a respective paper-guiding cylinder through the intermediary of the lever mechanism, the clamping device having a clamping bar and a device for actuating the clamping bar into a clamping mode and into a nonclamping mode, the actuating device being cooperatively engageable with the positioning unit, and spring devices for maintaining the clamping bar in the clamping mode wherein a cylinder covering is clamped thereby on the respective cylinder.

Abstract: A sheet transfer device for a printing machine with a transfer drum having a rotational axis, a sheet transfer cylinder located downstream from the transfer drum in a travel direction of a sheet through the printing machine, and cooperating with the transfer drum, and a gripper device on the sheet transfer cylinder for gripping at a take-over location a leading edge of the sheet guided by the transfer drum whereby the sheet is transferred to the sheet transfer cylinder includes a sucker arrangement including suction elements disposed on the transfer drum in vicinity of a trailing edge of the sheet guided by the transfer drum, the suction elements, in a starting position thereof, being flush with the periphery of the transfer drum, a suction-air control device actuable for supplying suction air to the suction elements so that suction contact may be made between the suction elements and the sheet, a device for articulatingly linking the suction elements to the transfer drum so that the suction elements are chan

Abstract: Sheet-guiding drum assembly for sheet-fed rotary printing machines includes a drum formed with a casing surface and provided with a casing foil disposed so as to have a given outer diameter, a member arranged beneath the casing foil and on the casing surface of the drum, and a device for varying the height of the member on the casing surface for varying as well the outer diameter of the casing foil.

Abstract: A remotely controllable adjusting device for elastically deforming a register rail in a substantially tangential direction of a sheet-guiding cylinder mounted in side walls of a sheet-fed printing machine, the sheet-guiding cylinder being preceded by a sheet-feeding device which accelerates the sheet to be printed to a speed greater than the peripheral speed of the sheet-guiding cylinder, and which brings the sheet into engagement with front guides of the register rail which is acted upon by the adjusting device operating against spring elements for elastically deforming the register rail includes a drive device arranged in the sheet-grinding cylinder and engaging deformingly with the register rail substantially in the longitudinal middle of the register rail, an axially adjustable profile rod having a first end for adjusting the drive device, the profile rod being disposed in the rotational center of the sheet-guiding cylinder, fixed against rotation relative to the cylinder, and having a second end accessib

Abstract: Sheet transfer drum located between two printing units of a multicolor sheet-fed rotary printing press and having a cylindrical surface formed of a plurality of sheet-carrying elements arranged in succession around the circumference of the drum, including a suction means applicable to the trailing edge of a sheet of paper to be printed, mountings located at ends of the sheet transfer drum for carrying the sheet to be printed, each of the end mountings being formed by a respective guide channel oriented in circumferential direction of the sheet transfer drum, the guide channel having a radially outer portion and a radially farther inward portion, at least the outer of the radial portions being substantially equal in length to a maximum format of the sheet.

Abstract: Transfer cylinder for conveying a sheet from one printing unit to another, comprising a cylindrical drum, a row of rubber suction pads for temporarily holding the sheet, the row of suction pads being disposed at an end of a sheet format length on the cylindrical surface of the drum, the rubber suction pads extending in axial direction of the drum, and paper supports disposed in vicinity of the rubber suction pads for respectively applying suction to and supporting the sheet.