Abstract: A displacement magnifying mechanism includes a base member and an electro actuator having a free ene and a base end connected to the base member, and having an actuator axis defined as passing through the free end and the base ene. The electro actuator has a rest state and an actuated state of extending and contracting along the actuator axis. The mechanism further includes an arm having first and second ends. A first resilient member has a first end connected to the free end of the electro actuator, and a second end connected to the second end of the arm. A second resilient member has a first end connected to the base member, and has a second end connected to the second end of the arm. The second resilient member is substantially parallel and substantially overlaps the first resilient member, and a distance between the first resilient member and second resilient member is less than a width of the electro actuator at a direction perpendicular to the actuator axis.

Abstract: A printing press comprising at least one printing stand, in which an impression cylinder, two printing cylinders, which are movable into engagement with the impression cylinder, and inking rollers associated with said plate cylinders, are rotatably mounted, and a main drive, which is operatively connected to the impression cylinder, wherein the impression cylinder, the plate cylinders and the inking rollers comprise stub shafts, to which gears are secured, which are adapted to be in mesh for synchronous rotation during a printing operation.

Abstract: A quick-action clamping device for fastening a printing plate on a plate cylinder in a printing machine by a fixed clamping bar and a displaceable clamping bar which are able to be brought into a clamping position and a plate-changing position, respectively, includes a spring device for resiliently pressing the displaceable clamping bar into the clamping position with a holding force for clamping a printing plate between the displaceable clamping bar and the fixed clamping bar, and at least one re-set element for returning the displaceable clamping bar to the plate-changing position against the holding force.

Abstract: A plate lockup apparatus for a printing press includes a leading-side lockup device, a trailing-side lockup device, and a cam mechanism. The trailing-side lockup device is located in the gap of the plate cylinder and grips a trailing edge of the plate, the trailing-side lockup device having a lockup table and a gripper plate, each having a plate gripper surface extending in a radial direction of the plate cylinder. The lockup table and the gripper plate are connected to each other at non-gripping ends thereof through a shaft. The cam mechanism has a cam, a cam surface of which is in contact with the lockup table. The cam mechanism is operated such that at a start of pivotal movement of the cam, the plate gripper surfaces of the lockup table and the gripper plate are closed to grip the plate, and at an end of pivotal movement of the cam, the lockup table and the gripper plate are moved together in a circumferential direction of the plate cylinder to tighten the gripped plate.

Abstract: A sealing device for a dampening unit on an offset printing press having a channel for receiving a dampening-solution supply and defined by a dampening-solution applicator roller and a metering roller which roll on one another, and having a seal holder mountable on a side part of the dampening unit and being in contact engagement with a sealing element, closing off one end of the channel, the sealing element having formed with an overflow opening for excess dampening solution, comprising a drain passage located between the sealing element and the seal holder and formed by a cutout on a side of the sealing element facing away from the channel, the cutout being connected with the overflow opening.

Abstract: In order to create a thermal regulator for a printing form (2) for anaqueous offset printing, a blast box (3) is provided for the blowing of the printing form (2) with tempered air, in which fans (4) and a cooler (5) are mounted, which is supplied from outside with a coolant (7) from a cooling installation (6), the cooling of the cooler (5) being regulated in dependence on a temperature of a regulator (8).

Abstract: A method for individual transfer of offset printing plates from a magazine in which the plates are supported at their lower edges and stacked with their respective non-coated sides facing upwards, to a receiving table. The receiving table receives each plate with the non-coated side of the plate facing downwards. The uppermost plate of the stack is gripped by a gripping device engaging the non-coated side of the plate in such a manner that the plate is retained by the gripping means during the transfer to the receiving table.

Abstract: A computer printer which has a print head and a printing bed plate comprises an apparatus to adjust the distance between the print head and the printing bed plate to thereby allow for printing on charts which are not of uniform thickness. The distance adjustment apparatus comprises a rigidly mounted sensing roller and/or a leading or trailing feeler lever, which electronically controls the print head distance.

Abstract: To securely attach a printing cylinder sleeve (3, 16, 28, 38, 38') over a cylinder core structure (2, 15, 27, 37), the core structure has grooves (4, 23, 29) located in the vicinity of axially remote end regions, which grooves are closed off by expansion rings (12, 25, 35, 38, 38'), which can be expanded by applying a hydraulic or pneumatic pressure medium, such as grease, or compressed air, between the core structure and the expansion ring. Connecting ducts, filled with grease, or connectable to a source of air pressure, are formed in the cylinder, connecting with the grooves therein.

Abstract: A color thermal printer has a character printing thermal head and a half-tone color image printing thermal head. The character printing thermal head records a black character on an image receiving sheet by heating the back surface of a black ink film. The half-tone color image printing thermal head records a color image on the image receiving sheet by heating the back surface of a color ink film having at least cyan, magenta, and yellow ink areas cyclically formed thereon. A heating element of the thermal head of conventional size is used for character printing, and a heating element with a smaller width than that of a conventional thermal head in the sub scan direction is used for half-tone color image printing.

Abstract: To permit use of a yielding surface covering (16) on an ink application cylinder (7, 12, 32) offset printing machine, without slippage or rubbing between the ink application cylinder and an adjacent plate cylinder (5, 31), a drive is arranged between the plate cylinder and the ink application cylinder which provides for corresponding linear circumferential speed by changing the profile of engaged drive gears (6, 13) driving the ink application cylinder and the plate cylinder; the drive gears have the same pitch circle diameter. The yielding surface (16) on the ink application cylinder has a thickness of between 2-3% of the diameter of the ink application cylinder (12) and a durometer value of between about 60-70 on the Shore A scale; the ink application cylinder (12) has a diameter of about 99% of the diameter of the plate cylinder and in operation is engaged against the plate cylinder over an engagement zone of about 7-9 mm in circumferential length (1).

Abstract: A head (9 or 10) records information on or reads information from a document (29) transportable along a transport path (3). A guide slide (17) guides the document (29) along the transport path (3). The guide slide is displaceable into and above the interaction region (28) for the head and the document to essentially bridge over this region during the feeding in and/or feeding out of the document.

Abstract: There is provided a mechanism for correcting the printing position of an electronic typewriter comprising a working pin attached to a ribbon bracket, the working pin cooperating with a ribbon cam so as to move the ribbon bracket to a printing or correction position, a coil spring for resiliently supporting the working pin, a printing track groove and correction track groove formed in one side of the ribbon cam and connected to each other, a correction angle formed between the starting points of the printing and correction grooves, and two slopes respectively formed in the starting points of the grooves. The lower ends of a push pawl and pawl locker are connected to carriage body respectively by means of a push pawl coil spring and pawl locker coil spring. A push cam is rotated by the turning force of a motor transmitted via an idle gear and following gear, and the pawl locker contacts the push pawl locker of the push pawl.

Abstract: An inking device for a thermal printer includes a hollow cylindrical inking roller made of a porous material and having a bladed wheel at the bottom of the cylindrical inking roller. The cylindrical inking roller supplies ink to an ink ribbon which contacts the outer periphery of the inking roller. A hollow cylindrical receptacle, for storing thermally fusible ink, is surrounded by the inking roller and has an opening at the top and apertures at the bottom for the egress of ink. A heater is provided for heating the receptacle. The receptacle has an axis deviated from the axis of rotation of the inking roller.

Abstract: A printer comprises a rotatable platen for supporting a sheet and a printhead which is capable of moving along the platen to print data on the sheet. A paper bail shaft supports paper bail rollers rotatably so as to be faced to the platen. A printhead retreating unit makes the printhead retreat to a position opposed to one end of the platen at the time of a paper feed operation. Arms serve as a paper bail retreating unit to separate the paper bail rollers from the platen at the time of the paper feed operation by displacing one end of the paper bail shaft a greater distance from the platen than the other end where the printhead is retreated.

Abstract: A method of repairing a spent printhead or printhead subassembly and a repaired printhead or printhead subassembly made in accordance with such method is disclosed. The method includes the steps of removing the print pins from the spent printhead or printhead subassembly, removing at least a portion of the nose section in the area of the print pin holes of the spent printhead or printhead subassembly, filling at least a portion of such removed portion of the nose section with a casting material, inserting guide wires into the print pin holes in the nose section and permitting the casting material to at least partially cure to form new print pin holes.

Abstract: A printing press having an impression cylinder with a bearing at each end an image carrier cylinder and a frame in which both cylinders are positioned. A device is provided for moving the impression cylinder between an engaged printing position cooperating with the image carrier cylinder and a disengaged position and also for producing a larger motion of the impression cylinder for the purpose of replacing the image carrier cylinder. A lead screw is provided for each bearing for lifting and lowering the bearing of the impression cylinder and a thrust piston and cylinder unit for acting on each bearing for urging the impression cylinder towards the image carrier cylinder. A nut engages each lead screw, each nut having a tubular section with a constant external diameter, and a pinion is mounted on each tubular section, and having a hub supported for pinion rotation in a fixed position relative to the frame.

Abstract: A release layer effective for both wax-bonded and plastic-bonded or wax and plastic-bonded melt color layers is provided in a thermocolor, e.g. thermocarbon, ribbon in the form of a substance capable of splitting off water at the thermal printing temperature dispersed in a binder.