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| Number | Title | Issue Date |
| 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 |
| 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 |
| 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 |
| 5676024 | Cam device A cam device includes an armlike cam follower for moving a lift unit upward and downward, and a plate cam having a cam contour face in contact with the cam follower. The cam is formed in a side surface thereof with a recessed portion having an inwardly fa... | 10/14/1997 |
| 5609103 | Sheet-metal guide for a sheet turning device A sheet turning device including a turning drum for turning over stock or a print carrier received in an ideal path of motion from a storage drum in a recto/verso or first-form and perfector printing process is in combination with a sheet-metal guide havi... | 03/11/1997 |
| 5503071 | Cylinder with retractable point spurs and signature clamps A folding cylinder for a web-fed rotary printing press is provided with signature end engaging point spurs. The cylinder is also provided with signature grippers which will engage the signature end or sides so that the point spurs can be retracted at a sl... | 04/02/1996 |
| 5473983 | Rotary printing press A rotary printing press for printing on sheets of printing stock will typically have cylinders mounted therein for transporting the sheets of printing stock through the printing press. Such transfer cylinders can typically be equipped with a gripper devic... | 12/12/1995 |
| 5461981 | Press blanket cylinder with blanket end ejection device A cylinder for a rotary printing press is provided with a press blanket clamping device that is usable to secure the ends of the press blanket to the cylinder. A blanket end ejection device is used to dislodge an edge strip of a blanket leading edge from ... | 10/31/1995 |
| 5413042 | Lock-up assembly for securing a printing plate on a plate cylinder A lock-up assembly (20) for securing a printing plate (22) on a plate cylinder (10) includes a rotatable lock bar (32) and a spring biased linkage mechanism (36). The linkage mechanism (36) has a first over-center condition in which it rotates the lock ba... | 05/09/1995 |
| 5343806 | Swivellable pre-gripper of a sheet-fed printing press and method of operation thereof Swivelling pre-gripper of a sheet-fed printing press having a sheet feeding table includes a swivel arm; a gripper carried by the swivel arm; a mutually cooperating roller lever and cam mechanism for, respectively, opening and closing the gripper; a devic... | 09/06/1994 |
| 5213035 | Device for changing-over a gripper control on a gripper cylinder of a turning device in a sheet-fed rotary printing machine for first-form and perfector printing A device for changing-over a gripper control on a gripper cylinder of a turning device in a sheet-fed rotary printing machine for first-form and perfector printing, including an adjusting gear and a fixed gear disposed coaxially with one another, the adju... | 05/25/1993 |
| 5186106 | Arrangement on transfer drum for in-registry sheet transfer An arrangement on transfer drums for in-registry sheet transfer in sheet rotary printing machines, has gripper units mounted on cylinders, toothed segments which during a sheet transfer are in engagement, each of the gripper units having a gripper shaft, ... | 02/16/1993 |
| 5134938 | Sheet feeding unit for rotary printing machine A sheet feeding unit for a rotary sheet printing machine which is operative for selective face printing or face and back printing with turning of a sheet rear edge and which has a turning cylinder and a printing cylinder located before the turning cylinde... | 08/04/1992 |
| 5031531 | Device for adjusting the rotational position of a cylinder of a turning device in a rotary printing press and for axially displacing an adjusting member for a gripper change-over on the cylinder A device for adjusting a rotational position between coaxial fixed and adjusting gears and for changing-over a gripper by axially displacing an adjusting member on a cylinder of a turning device of a sheet-fed rotary printing press, includes a pressure me... | 07/16/1991 |
| 4928586 | Sheet reversing unit for sheet printing press A sheet reversing unit for a sheet printing press which includes a reversing gripper device and a suction lever. A cam follower is pivotally mounted on a cam lever and is brought into contact with a cam surface of a cam mechanism for opening and closing t... | 05/29/1990 |
| 4903957 | Dynamically stable sheet clamping system for high speed sheet handling drums A sheet clamping system for high speed rotatable drums is provided in which light-weight clamping bars, formed of relatively thin metal sheet stock, are configured and/or oriented for maximum resistance to deflection radially of the axis of drum rotation ... | 02/27/1990 |
| 4858910 | Conveyor for a sheet-fed rotary press A conveyor for a sheet-fed rotary printing press for transferring sheets away from an impression cylinder includes a delivery cylinder disposed adjacent the impression cylinder, and a chain conveyor having a plurality of sheet grippers, adapted for moving... | 08/22/1989 |
| 4854236 | Transmission system for forming cyclical motion from rotational motion printing press with counterbalance for torque fluctuation of gripper feed drum Transmission system for forming cyclical motion from rotational motion including a device having a rotating part and at least one control lever set into cyclical motion by rotational motion of the rotating part, the one control lever and the rotating part... | 08/08/1989 |
| 4846062 | Sheet-turning drum in sheet-fed rotary printing presses A sheet-turning drum in a sheet-fed rotary printing press for optionally first printing or perfecting printing is provided that is simple to assemble and adapted to be changed over for differing printing requirements. To this end, the sheet-turning drum i... | 07/11/1989 |
| 4700626 | Reversing gripper of one side and perfecting printing press A reversing gripper apparatus of a one side/perfecting printing press is disclosed. This reversing gripper apparatus comprises a receiving portion wherein a gripper pad fixed to the external circumference of a reversing cylinder grips a sheet of paper in ... | 10/20/1987 |
| 4664032 | Vertically adjustable gripper supports for the grippers of reversing drums of perfecting presses A vertically adjustable gripper support mechanism for the grippers of turning drums of perfecting presses wherein the sheet is turned by two correlatively cooperating gripper systems disposed on cam-controlled pivot shafts biased by return springs. An adj... | 05/12/1987 |
| 4608925 | Sheet transfer cylinder in sheet-fed rotary printing machines In sheet-fed rotary printing machines, a sheet transfer cylinder having a sheet-bearing cylinder jacket formed of a plurality of jacket segments arranged next to one another in circumferential direction of the cylinder, the jacket segments extending at le... | 09/02/1986 |
| 4534552 | Sheet diverting system A sheet diverter system in which a stream of sheets is fed by a pair of tapes to a gripping zone between a pair of separating cylinders. The tapes on opposite sides of the sheet diverge downstream of the gripping zone and wrap around a part of the outer p... | 08/13/1985 |
| 4466350 | Sheet transfer cylinder assembly of a sheet-fed rotary printing machine having a device for correcting register of overprints Sheet transfer cylinder assembly of a sheet-fed rotary printing machine including a sheet transfer cylinder and a device for correcting register of overprints on a sheet by deforming the leading edge of the sheet which includes a gripper fly supported on ... | 08/21/1984 |
| 4443094 | Duplicating machine with duplexing capability In a duplicating machine for duplicating images on both sides of copy sheets including a blanket cylinder and an impression cylinder, a mechanism for handling the sheets and re-feeding the sheets back to the impression cylinder for duplex copying. The bla... | 04/17/1984 |
| 4390176 | Sheet clamping device A sheet clamping device is provided which is used to clamp both the leading and the trailing end of a sheet while the sheet is being disposed around the peripheral surface of a drum rotating in a given direction. The drum is provided with a front and a re... | 06/28/1983 |
| 4370928 | Sheet fed rotary press having an auxiliary gripper system arranged below a feeding cylinder The sheet fed rotary press includes a feed cylinder cooperating with a feed table extending in a plane situated below and in spaced relationship from the periphery of the feed cylinder. An auxiliary gripper system located under the feed cylinder provides ... | 02/01/1983 |
| 4362099 | Adjusting device for sheet reversing in a sheet-fed rotary press An adjusting device for sheet reversing in a sheet-fed rotary press comprises a reversing cylinder which is driven by a drive shaft and carries a plurality of sheet grippers, a rotary drum carrying a plurality of leading-end grippers, a rotary assembly ca... | 12/07/1982 |
| 4362105 | Sheet drawing device for a sheet-fed rotary press A sheet drawing device for a sheet-fed rotary press comprises a pair of adjusting gears adjustably mounted on a main shaft, a plurality of segment arms rotatably mounted on the main shaft, a bearing block adjustably mounted on each of the segment arms, wh... | 12/07/1982 |
| 4307801 | Conveyor apparatus for substantially flat products, especially printed products Each of both clamping jaws of a product gripper are formed by a holder portion and an extension portion formed of one-piece with the related holder portion. Both of the holder portions are held in their closed position by means of a closure spring. The cl... | 12/29/1981 |
| 4241658 | Duplicating machine with duplexing capability A system for duplicating images on copy sheets utilizing an impression cylinder. The system provides for transfer of an image to one side of each sheet, and the sheet may then be reversed to locate the sheet on the impression cylinder, trailing edge first... | 12/30/1980 |
| 4231291 | Printing press The basic press structure includes a printing couple consisting of a lower printing cylinder, having a single work area, and a large printing cylinder, having an effective diameter which is a whole multiple, greater than one, of the effective diameter of ... | 11/04/1980 |
| 4210079 | Advancing cylinder for use in a printing machine A sheet advancing cylinder in an offset printing machine, has a sheet gripping system arranged in its interior. The system includes a rocking member rigidly connected to a first gripper for moving the latter between two terminal positions in a slot formed... | 07/01/1980 |
| 4204472 | Duplexing copying system A system for duplicating images wherein a copy sheet is delivered to a first gripper of an impression cylinder. A first image is transferred to one side of each sheet, and each sheet is then released by the first gripper and delivered to a reversing means... | 05/27/1980 |
| 4120492 | Gripper mechanism A gripper mechanism for seizing the trailing edges of paper sheets on a transfer drum of a printing machine. A plurality of rollers are resiliently mounted so as to be rotationally shiftable toward the direction of movement of the paper sheet. The rollers... | 10/17/1978 |
| 4003310 | Control apparatus for gripper finger shaft for printing press In a printing press having a conventional plate cylinder and an impression cylinder operatively positioned on a frame with the impression cylinder having gripper fingers and a gripper finger positioning shaft, the improvement relating to a tumbler member ... | 01/18/1977 |
