Abstract: A device for driving an oscillating auxiliary gripper of a printing press includes a driven shaft having an eccentric portion thereon, the driven shaft being rotatably mounted on the side upright of the press and on the eccentric portion of which a cam-actuated auxiliary gripper shaft is rotatably mounted for oscillation thereon. A driven gear is rigidly secured to the driven shaft and meshes permanently with a drive gear that rotates with the impression cylinder to provide positively cooperating drive elements for introducing the desired additional oscillating motion upon the continuous orbital movement of the auxiliary gripper shaft.

Abstract: A sheet feed rotary press having a main ink feed unit and a plate cylinder, at least one of a plurality of transfer and applicator rolls coupled between the main ink feed unit and the plate cylinder being moveable to an inoperative position for selectively isolating a relatively short length group of applicator and transfer rolls from the main ink feed unit, and an additional quick acting ink feed unit that is selectively moveable into engagement with the short length roll group for supplying lesser quantities of ink to the plate cylinder through a shortened path via the short length roll group.

Abstract: A sheet transfer conveyor for rotary sheet feed printing press comprising a pair of chains which support and transport a plurality of gripper carrying trolleys which successively engage the leading edge of a sheet from a printing press cylinder, such as an impression cylinder, for removing the sheet from the cylinder and transferring it to the next printing unit or to a delivery unit. The trolleys are supported on the chains by resilient mountings which, following engagement of a sheet by the gripper, pivot the trolley under a spring biasing force to maintain substantially constant tension on the sheet throughout the period the sheet is being removed from the cylinder. Guide rails are provided which define a guide channel for guiding the trolleys into predetermined relation to the cylinder for engaging the sheet, and at such point, the guide rails are recessed to permit pivotal movement of the trolley under the biasing force of the spring mounting.

Abstract: A resilient sheet gripper for a sheet-fed rotary printing press having a gripper shaft to which is secured a pivoting clamping member in resilient relationship with a pivotable gripper finger having a fulcrum and adjsutable biasing, is provided including a base member mounted loosely around the gripper shaft, a joint on the base member for pivotally securing the finger to the base member, a plurality of compression springs disposed on opposite sides of the gripper shaft with associated stops for adjustably pressing the gripper finger and the base member against the clamping member, and another stop which acts against the cylinder upon closure of the gripper finger thereby moving the fulcrum of the gripper finger from the gripper shaft to the joint so as to change the gripper finger lever transmission which then increases the retaining force.

Abstract: 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 the grippers about the delivery cylinder for successively engaging sheets on the impression cylinder. The delivery cylinder has a gap in its outer periphery for receiving successive of the sheet grippers during transfer of a sheet from the impression cylinder to the sheet grippers. The sheet grippers each include a support and a pivotable gripper finger, and a displacer mounted on and extending rearwardly of each gripper support for bridging the gap in the delivery cylinder within which the gripper is disposed during a sheet transfer operation, and for maintaining tension in the sheet during transfer from the impression cylinder to the chain conveyor. The displacer is comb shaped having a plurality of rearwardly extending arcute shaped teeth.

Abstract: To permit re-lining of a printing machine cylinder (9), while retaining the printing machine cylinder in adjusted position with respect to a reference, for example an associated cylinder, the side wall (1) of the printing machine is formed with an opening (2) sufficiently large to permit placing of a sleeve (14) over the cylinder. The cylinder shaft (8) is retained, prior to re-lining, in eccentric adjustment by a jaw chuck (3), preferably having three jaws (16, 17, 18) arranged in a star pattern and surrounding the shaft or the bearing, or an eccentric element thereof; the jaws of the jaw chuck are so placed that they can be withdrawn to clear the opening.

Abstract: A protective device for a printing press having a hinged protective cover with an automatic mechanical interlocking mechanism, which includes a fixed pawl on the press frame and a cooperating interlocking element which, by shifting its center of gravity, automatically engages in and disengages from a recess in the pawl as the cover is successively raised and lowered with respect to a latched open position.

Abstract: A device the for in-register transfer of sheets and for the conveyance thereof between the printing units of a multi-color press by means of gripper carriages that move on rails and which are driven by an endless chain and which are aligned on the delivery and feed cylinders by rotating drive forks and that cooperate with a cam roller carried by the carriage. For joint axial and radial alignment with quiet entry the drive fork has leading and trailing flanks of different thicknesses and the flanks are guided into engagement with the cam roller by hardened guide plates in the gripper carriage. The leading flank is undersized and the second flank has the dimension necessary for establishing proper registration of the carriage.

Abstract: 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 is subdivided into a unitary main member and a cylindrical drum envelope. The latter having a sheet support surface and flanges disposed on its end faces for securing the envelope between mounting flanges on the main member. The sheet support surfaces of the drum envelope can be in the form of a smooth metal surface, an ink-repellent fabric or support rollers retained on carrying rods.

Abstract: To permit simultaneous stapling of a plurality of folded sheet products (3) in compact space, the sheet products are opened in V shaped formation by carrying them on zig-zag or accordion-pleat carrier elements (1, 1'). The folded elements are transported to stapling systems (8-13), in a direction transverse to the central plane (20) of the folded products. Staple heads (13) move staples against the folded back of the folded products and are closed by a staple counter or closing elements (12) lowered into the open V of the opened folded products (3), preferably along the central plane (20) of the V (21). After stapling, the folded products are transported in direction reverse to the direction of movement to the stapling station, for storage, or delivery to a transport system (15).

Abstract: A shifting gear for the inkbox roller of a printing press having a freewheeling journal arranged on the roller axis including a drive pin connected to a slide block carried by the journal and a swingably borne slide block frame having a swinging axis connected with an oscillating drive to the press roller, the swinging axis of the slide block frame being shiftably arranged by a setting gear with respect to the drive pin of the freewheeling journal, and the setting gear having a setting sindle and drive nut connected with a bearing lever swingable on the machine frame and carrying the swinging axis of the slide block frame, the spindle having a setting groove whose pitch corresponds to the maximal setting range of the setting gear and the drive nut carrying a guide pin positioned in the setting groove. In the preferred embodiment, the setting spindle is connected with a turning grip and, with interposition of an indexing arrangement, the setting spindle is adjustable in small annular steps.

Abstract: To permit uniformly tensioning a holding strip (11) in which end portions (22, 23) of a cover layer such as a rubber blanket (24) can be inserted, the strip (11) is coupled to a plurality of rods (9) extending radially inwardly, and uniformly distributed over the axial length of the strip (11), the rods (9) being coupled to respective pistons (5) slidable in cylinder bores (4) worked in the bottom of the groove (2). Hydraulic or pneumatic pressure can be applied to one face of the piston, the opposite face of the piston being loaded by a spring (17). Thus, since the pressure being applied to all the pistons will be uniform, tensioning pressure (FIG. 2) will be uniform, or raising pressure (FIG. 3) will be uniform. Rather than using fluid pressure, other non-mechanical energy, such as electrical energy, can be used to raise the strip (11) by electromagnetic coupling of solenoids to the rods (9).

Abstract: The invention relates to a back-edge stop in the form of a cross-member for sheet stackers of sheet-fed presses having a vertically positionable intermediate stacker which forms a relatively large stack, the cross-member being pivotally connected to the sheet brake by way of a link parallelogram support. A sheet brake has disposed on it fixed sheet stops and at least one further fixed sheet stop having a recess in which a brush is pivotally mounted, the bristles of the brush being inclined forwardly and downwardly and extending into the major surface of the stack a distance substantially equivalent to the difference in sheet size. As the intermediate stacker rises and falls, the brush is pivoted, by way of an inclined cam surface on the cross-member, this surface being connected non-positively to engage an actuating edge of the brush to make a controlled pivoting movement around a horizontal axis extending transversely to the direction of sheet movement.

Abstract: A sheet gripper assembly for a sheet-fed rotary printing press having a gripper tip with a non-resilient pressure element fastened to the gripper tip by a layer of resilient material, the pressure element having a central protuberance, extending through the resilient layer, upon which the gripper tip bears.

Abstract: To permit both circumferential as well as axial register adjustment of three printing couples (1, 2, 3), in which the respective cylinders of the printing couples are interconnected by spiral gears, two of the blanket cylinders (4, 8) are axially shiftable. The changes in circumferential register, upon changing of lateral register--due to the spiral gears--are compensated by position motor controllers (34, 44) which may include a microprocessor (50), automatically. Lateral register is set in a predetermined sequence by the respective cylinders, in accordance with the coupling of one of the plate cylinders (e.g. 5) with a printing machine main drive pinion (68).

Abstract: To permit continuous adjustment of a groove cover element (15), the groove cover element is extended in the groove, formed with a through-bore (14) in which an eccentric cam (7) is located, which can be rotated by a spindle. By rotating the spindle, the cover element is raised from the groove, or lowered against a rubber blanket, printing plate or the like thereon. The spindle can be locked in rotated position by a counter nut (FIG. 1) or can be free to rock continuously during rotation of the cylinder by linking the spindle to an arm which rides on a fixed cam. The cam can be adjusted so that the position of the spindle, and hence of the groove cover element, will be flush with the cylinder just at the time when the cylinder rolls off against an adjacent cylinder (100). Adjustment of the cam can be manual, for example via a worm gear drive, or electrically, for example by a stepping motor, so that automatic speed-dependent positional adjustment of the cam is possible.

Abstract: An aligning device for sheet deliveries of printing presses which includes fixed sheet stops for the front edge of the delivery stack, fixed sheet stops for the back edge of the delivery stack, and movable brush sheet stops for the back edge of the delivery stack having a sheet brake disposed thereon oriented transverse to the direction of sheet movement. The brush sheet stops comprising one or more recessed brushes having firm bristles which are directed at a forwardly and downwardly inclined angle.

Abstract: A clamping device of a plate cylinder for recessed in-line varnishing in a rotary press which comprises two axis-parallel clamp bars having a top part and a bottom part, which are circumferentially adjustable in a parallel or an inclined relationship to one another in guides by means of clamp screws bearing against the plate cylinder, and which are axially adjustable by means of axial setscrews, and having a groove extending over the entire length of the clamp bars in the bottom part which provides for the insertion and fixing of reinforced bent ends of the blanket, and the top part is pivotally and slidably connected to the bottom part by locking devices and recesses for the clamping screws, and additional centering means are provided for at least two of the clamping screws.

Abstract: To permit accurate control of ink being transferred by an ink transfer roller from an ink source (6; 15, 16, 17) to an ink accepting roller (1, 10), the transfer roller (2, 11) has a surface layer (3, 12) which is made of compressible material, the surface layer being formed with shallow cup-like depression in a grid or similar raster pattern. Upon compression and deformation of the depth of the shallow cup-like depressions, the cup-like depressions will change their volume and thus change the quantity of ink being transferred. This also permits direct inking of a forme cylinder (1) by a chamber ink supply arrangement (6) since the hard surface of the forme cylinder will be engaged by the resilient or compressible surface layer (3, 12) of the transfer roller.

Abstract: A densitometric sensing device in which a density measuring head, which is part of the device, traverses an ink test strip printed on a page which is fed to or placed on the device. The problem of misalignment between the thus-placed ink test strip and the scanning direction of the density measuring head is avoided by providing a plurality of density measuring receivers in the measuring head, mounted transverse to the direction of travel so that the ink test strip is always under some of the receivers. The measured density values of all of the receivers are passed to a comparison circuit which cooperates with a logic circuit to determine from the values of the signals themselves which should be used to produce a composite density value, which is then used as the density for the zone being scanned.