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| Number | Title | Issue Date |
| 8122827 | Apparatus for turning a sheet during transport through a printing press An apparatus for turning a sheet during transport through a printing press provides better printed results as a result of improved sheet guidance. A transfer drum has gripper systems disposed in channels for holding the sheet at the leading and trailing sheet edge, ... | 02/28/2012 |
| 7617772 | Balancing system for balancing a printing drum and method for balancing the printing drum In a balancing system and a method for balancing a drum of a printing plate exposer, at least one mass element is provided which can be moved substantially in the circumferential direction of the drum in order to reduce an imbalance of the drum. Previous devices and... | 11/17/2009 |
| 7412925 | Device for changing over gripper control in a turning configuration of a sheet-processing machine In a device for changing over a gripper control in a turning configuration of a sheet-processing machine, there is provided a slide to be guided axially displaceably by radial stops. The device changes over a gripper control from recto printing to verso printing on ... | 08/19/2008 |
| 7363730 | Devices and method for removing broken pulp web from a pulp dryer and maintenance platform for a pulp dryer A device (21) and method for removing a broken pulp web (27) from a pulp dryer and a maintenance platform (23) comprising such a device. The device (21) comprises an actuator (31), a pulling means (33) functionally coupled t... | 04/29/2008 |
| 7320281 | Method of varying a drum profile of a vario drum and vario drum for implementing the method A method of varying a drum profile of a vario drum for transporting printing material sheets, in which shell segments of the vario drum are pivoted inward and outward. Sheet supporting elements assigned to the shell segments are reversibly deformed by pivoting the s... | 01/22/2008 |
| 7234395 | Device for conveying a sheet through a printing machine A device for conveying a sheet through a printing machine includes a cylinder, formed with a channel wherein grippers are disposed for holding the sheet at a leading edge, a chain conveyor with grippers fixed to endless chains for holding and picking up the sheet at... | 06/26/2007 |
| 7150456 | Sheet transport drum for a machine processing printing-material sheets A machine processing printing-material sheets contains a first sheet transport drum and a second sheet transport drum disposed immediately after the first sheet transport drum in a sheet transport direction. The first sheet transport drum has gripper systems which d... | 12/19/2006 |
| 7000540 | Method of operating a machine processing printing material sheets In a method of operating a machine processing printing material sheets and having a sheet transport drum in various operating modes, drum circumferential shells are kept fixed on the sheet transport drum in an outer position in a first of the operating modes and in ... | 02/21/2006 |
| 6971280 | Cam mechanism on a folding cylinder A cam mechanism for a folding cylinder or gripping cylinder of a printing machine have a cam disk assembly with two cam disks located adjacent to one another. The cam mechanism has good kinematic properties and is subject to low wear, the outer casing of the cam rol... | 12/06/2005 |
| 6912952 | Duplex printing system Apparatus for duplex printing comprising: a first impression roller (24) on which a first side of a sheet (22) having a leading edge and a trailing edge is printed referenced to the leading edge; a second impression roller (26) on which a second... | 07/05/2005 |
| 6877427 | Quality control device A quality control device includes a suction box, at least one gripper which can be displaced along a suction surface of the suction box, and a CCD camera. A belt, which can be displaced in a sheet transport direction, is disposed on the suction surface of the suctio... | 04/12/2005 |
| 6862985 | Guiding device for metal-sheet printing machines and metal-sheet painting machines The invention relates to a guiding device for metal sheet printing machines and metal sheet painting machines, which have at least two printing cylinders and a transfer drum situated therebetween. The guiding device is arranged on said transfer drum and, to be preci... | 03/08/2005 |
| 6848363 | Device for changing the operating state of a gripper-control device in a sheet-reversing device of a sheet-processing machine and sheet-processing machine having the device A device for changing an operating state of a gripper-control device in a sheet-reversing device of a sheet-processing machine including a cylinder having an actuating shaft accommodated therein, includes an activating element cooperatively engaging with the actuati... | 02/01/2005 |
| 6810806 | Printing machine with compensation elements for compensating speed differences and transfer errors between printing groups and method of transferring printed sheets in such a printing machine A printing machine, which includes at least two printing unit groups having drives which are decoupled from one another and assigned, respectively, to one printing unit group, and having printing units with transfer cylinders, include compensation elements for compe... | 11/02/2004 |
| 6786154 | Mechanism for correcting unbalance of a rotor A mechanism for correcting unbalance of a rotor that is caused at positions at which at least one of a leading edge chuck and a trailing edge chuck that hold a sheet member disposed on a peripheral surface of the rotor varying in accordance with the sheet size. The ... | 09/07/2004 |
| 6715751 | Device for adjusting the position of sheet material when a direction of motion thereof is reversed A method of correcting a position of sheet material on conveying elements, the sheet material extending from a surface of a first sheet-conveying element to a surface of a second sheet-conveying element following downline from the first sheet-conveying element, as v... | 04/06/2004 |
| 6705221 | Device for turning or reversing flat copies in half-revolution sheet-processing machines In a sheet-processing rotary printing machine operatable in recto printing and recto/verso printing modes, there is provided a device for reversing sheets, which includes a transfer drum bounded by two sheet-guiding cylinders, a reversing/storage drum and an additio... | 03/16/2004 |
| 6698351 | Double-sided printing press There is provided a double-sided printing press that includes a sheet-turning-over mechanism for turning sheets upside down at a sheet-turning-timing according to a set length of sheets, which has been previously set for the sheet-turning-over mechanism; ... | 03/02/2004 |
| 6684774 | Sheet-fed rotary printing press A sheet-fed rotary printing press has at least one unit which includes an impression cylinder and an additional cylinder assigned to the impression cylinder. The impression cylinder and the additional cylinder are relatively adjustable a spaced distance f... | 02/03/2004 |
| 6640706 | Guiding device for an areal printing material A guiding device for an areal printing material, the guiding device having an areal structure with a guide surface facing towards the printing material, and wherein the areal structure includes a supporting layer, and a surface layer is provided for formi... | 11/04/2003 |
| 6349641 | Feeder unit for a sheet-processing machine A feeder unit for a sheet-processing machine having a plurality of processing units is provided. The feeder unit includes a feeder, a feed table, and a feed drum. The feed drum is double-sized or larger in that it has a diameter at least twice that of the... | 02/26/2002 |
| 6283467 | Sheet-like object convey apparatus for sheet-fed rotary printing press In a sheet-like object convey apparatus for a sheet-fed rotary printing press a cylinder shaft is rotatably supported between a pair of frames and rotatably driven during conveyance of a sheet-like object. Gripper pads and grippers grip an end of a sheet-... | 09/04/2001 |
| 6254089 | Suction gripper for transferring the trailing edge of a sheet in a turning device of a sheet-fed rotary printing machine A suction gripper for transferring a trailing edge of a sheet guided on an upstream sheet-conveying cylinder to a downstream sheet-conveying cylinder of a turning device of a sheet-fed rotary printing machine includes a holding arm. The holding arm can be... | 07/03/2001 |
| 6109173 | Stencil printing machine A stencil printing machine includes a printing drum having a flexible ink-permeable circumferential wall adapted to receive a perforated stencil sheet around an outer circumferential surface thereof, the printing drum being driven to rotate around a centr... | 08/29/2000 |
| 6098543 | Suction gripper in a reversing device of a sheet-fed rotary printing press In a reversing device of a sheet-fed rotary printing machine, there is provided a suction gripper for taking over a trailing edge of a sheet conveyed on an upline sheet-conveying cylinder, the suction gripper being movable out of a periphery of a downline... | 08/08/2000 |
| 6038976 | Suction-air control device A suction-air control device for controlling suction air applied to suction openings of a printing-press cylinder, having controllable valves by which the suction openings are connectable to a suction-air source, and a first pneumatic control device for t... | 03/21/2000 |
| 6000694 | Drive system for an oscillating pregripper of a sheet-fed printing machine A drive system for an oscillating gripper of a sheet-fed printing machine has a main drive train and a controlled drive. The pregripper is mechanically coupled to the main drive train. The controlled drive supplies energy required to drive the pregripper ... | 12/14/1999 |
| 5947469 | Device for laterally aligning sheets in a feeder of a sheet-fed rotary printing press Device for laterally aligning sheets in a feeder of a sheet-fed rotary printing press wherein sheets having respective leading edges aligned at front lays of a feeder table are gripped by a gripper system of a pregripper in succession individually at an e... | 09/07/1999 |
| 5906368 | Drive mechanism for a gripper mechanism arranged in a drivable drum for feeding separate products A drive for a gripper mechanism of a feeding device for feeding separate products, for instance loose sheets, to a packaging or labelling machine, which gripper mechanism is arranged on a drivable drum (1) and comprises gripper elements (2) for gripping t... | 05/25/1999 |
| 5901955 | Gripper seat A rotatable gripper drum includes a seat mounted on the drum and a gripper supported on the drum for pivotal movement relative to the seat between an open position and a closed position. The seat is made from a resilient material and includes a body porti... | 05/11/1999 |
| 5765459 | Method for moving point neeedles in a two stage extension path Point needles in a collecting cylinder are driven in a two stage extension process to initially needle or pierce the leading edge of a product web being cut. Once the cut has been made, the needle tips are moved further radially outwardly from the cylinde... | 06/16/1998 |
| 5762333 | Sheet reversing apparatus for sheet-fed rotary press with reversing mechanism A sheet reversing apparatus for a sheet-fed rotary press with a reversing mechanism includes a paper convey cylinder, gaps, a reversing mechanism, a paper trailing end holding member, a moving unit, and a pivoting unit. The moving unit performs a moving o... | 06/09/1998 |
| 5749296 | Sheet transfer device of a sheet-fed rotary printing press 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 ... | 05/12/1998 |
| 5749572 | Gripper control for a cyclically rockingly driven pregripper for single-sheet transport in a sheet-fed printing press Gripper control for a cyclically rockingly driven pregripper for single-sheet feeding in a sheet-fed printing press, the pregripper being disposed at a free end of a rocker lever, which is swivelable about a rocker shaft fixed to a frame of the printing p... | 05/12/1998 |
| 5651544 | Device for avoiding registration errors in a sheet-processing machine Device for avoiding registration errors at an oscillating pregripper of a sheet-processing machine includes a gripper bar deflectable in synchronism with the machine so that a respective sheet being processed therein undergoes stretching in a trailing reg... | 07/29/1997 |
| 5611276 | Suction-type grippers for a sheet transfer drum 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 fl... | 03/18/1997 |
| 5609105 | Sheet-conveying drum for printing machines A sheet-conveying drum for use between units in a printing machine is provided with a plurality of gripper bridges arranged substantially circumferentially symmetrically on the drum surface. The gripper bridges hold the paper to the drum and include gripp... | 03/11/1997 |
| 5596929 | Device for register correction and for compensating for distorted sheets in a feeder of a sheet-fed rotary printing press Device for register correction and for compensating for distorted sheets in a pregripper of a feeder for a sheet-fed rotary printing press has a frame-fixed brace disposed on a pregripper shaft and located approximately centrally between end supports on a... | 01/28/1997 |
| 5579691 | Sheet transfer drum in a multi-color sheet-fed rotary printing press A sheet transfer drum of a multi-color sheet-fed rotary printing press. A central drum body with flat portions carries at least one gripper system which extends over the sheet width. Jacket segments are mounted on the flat portions of the drum body. The j... | 12/03/1996 |
| 5562035 | Adjusting device with a pneumatic cylinder in a printing press An adjusting device has a pneumatically operating piston-cylinder unit pressurizable in an operating function thereof for actuating adjusting elements in a printing press. The piston-cylinder unit includes a cylinder housing formed with a cylinder chamber... | 10/08/1996 |
