Heidelberger Druckmaschinen Ag

Rudi Haupenthal

Arno Wirz

Jens Friedrichs

Hans-Peter Hiltwein

Karl-Heinz Helmstadter

Raimund Schroder

Maurice Lammerzahl

Roland Krupp

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.

Gripper for a sheet-transporting cylinder or drum of a rotary printing press

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.

Device for controlling suction air or vacuum and method of actuating the

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.

Rotary printing-machine cylinder having a variable outer diameter

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.

Adjustment device for adjusting the height of gripper impact bars

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.

Sheet transfer device of a sheet-fed rotary printing press

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.

Suction-type grippers for a sheet transfer drum

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.

Multi-way slide-type shutoff valve for suction air of suction-type

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.

Device for adjusting the positions of suction-type grippers on a

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.

Device for adjusting the position of suction-type grippers on a

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 being associated with the respective guide disc and being connected to at least one cross-member, the at least one guide element being seated in a control slot formed in the control disc, the control slot having a radial guiding component, the gripper devices for holding the sheet trailing edge being disposed on the at least one cross-member, at least one of the control discs being connected to a driving element for rotating the control discs relative to the guide discs on the shaft of the sheet-transfer drum.

Device for sheet-format adjustment of a sheet-transfer drum

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. At least one closing member formed with at least one air-passage opening disposed over a defined rotational-angle range connects the one suction-air bore formed in the journal with at least one connection hole formed in the housing of the rotary valve.

Suction-air control device for a sheet-transfer drum

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.

Device for adjusting the positions of suction grippers on a sheet

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.

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.

Device for remotely controlling clamping devices on cylinders in a

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 changeable in position from the starting position thereof in a radial and tangential direction with respect to the transfer drum and beyond the periphery thereof into a swung-out position thereof, and a resilient restoring device for returning the suction elements from the swung-out position thereof to the starting position thereof, the suction-air control device being actuable for continuously applying suction air to the suction elements, after the sheet has been gripped at the take-over location, for at least so long that the transfer drum has turned through a rotary angle which is greater by an angle .alpha. than an angle .alpha., included by the suction elements, on the one hand, and by the leading edge of the sheet, on the other hand, and having its vertex in the rotational axis of the transfer drum.

Growing community of inventors

Epfenbach, Germany

Rudi Haupenthal