Man Roland Druckmaschinen Ag

Roland Offsetmaschinenfabrik Faber & Schleicher Ag

M.a.n.-roland

Man Roland Druckmaschinen

Paul Abendroth

Roland Holl

Josef Mathes

Dietrich Dettinger

Janko Despot

Herbert Rebel

Helmut Emrich

Hans-Wilhelm Leyendecker

Peter Hummel

Robert Ortner

Harry M Greiner

Manfred Herold

Achim Stoffler

Klaus Neberle

Rudolf Raab

Herbert Geschwindner

Kurt Reiser

Joachim Herzel

Joachim Steuer

Werner Kaiser

Harry Brandes

Klaus List

Helmust Emrich

Wolfgang Seikel

Wolfgang Schales

A mounting device is provided for an ink duct of a printing press wherein the ink duct is supported primarily on the press frame so as to be pivotally movable with respect to a ductor roller. The ink duct carries a first guide roller which engages the ductor roller in substantially the same plane as the ink metering elements disposed in the ink duct and the ink duct carries a second guide roller which engages the ductor roller substantially vertically above its center line. A link pivoted to the ink duct carries a third guide roller which is normally biased into engagement with the ductor roller at a position disposed from the first guide roller by at least 180.degree. measured peripherally around the ductor roller through the second guide roller. An unlocking mechanism swings the third guide roller out of engagement with the ductor roller so as to permit pivotal movement of the ink duct and guide rollers away from the ductor roller.

Ink metering apparatus with pivotally engageable ink duct

A drive for rotating and reciprocating a distributing roller in inking or damping units of offset printing presses includes two gears rotating at different speeds from one another, only the first rotation-transmitting gear of the two gears is driven by a gear connected to the plate cylinder and the second lateral reciprocation-transmitting gear is driven by the first gear by way of an intermediate gear meshing with both gears.

Drive for the rotation and laterally reciprocating distributing roller

An air cushion drum for a sheet-fed printing press is formed with an internal body and an outer casing defining a cavity inside the drum through which air streams are supplied to issue from orifices in the drum casing and force the sheets away therefrom. To reduce airflow noise a sound-absorbent layer which has radial ducts is disposed in the cavity and forms therein an air-permeable partition which is equidistant from the drum casing. In the preferred embodiment, the sound-absorbent layer is supported by a lattice formed with droplet shaped members which further reduce air flow resistance and the sound-absorbent layer which may be formed of felt or foam is supported on the lattice by an outer stabilizing layer of plastic material.

Air cushion drum or sheet-fed printing presses

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. To this end, a trio of cams secured to the upright act on the auxiliary gripper shaft by way of cam followers disposed on a link rod rotatably mounted on the auxiliary gripper shaft and a drag lever is pivotally connected to the link rod by way of a pivot connection and is also pivotally and eccentrically connected to the driven gear by way of a pivoted connection therein for oscillating the auxiliary gripper shaft on the eccentric portion of the rotating driven shaft.

Linkage mechanism for driving an oscillating auxiliary gripper of a

A sheet transfer drum for a recto and verso printing press having a two-piece section device, each piece being mounted on a diagonal slide, the slides being angled in opposite directions, so that the two pieces hold the two corners of the trailing edge of the sheet and stretch the corners in opposite axial directions as well as the circumferential direction of the sheet transfer drum. The stretching of the sheet is synchronized to the rotation of the transfer drum and effected by a control cam cooperating with a cam fixed to the printing press frame. The suction of the suction device is synchronized to rotation of the transfer drum by a commuting air connection between the suction device and a source of suction external to the press frame. The suction device is also adjustably mounted to the shaft of the transfer drum so that sheets of various length may be stretched. The shaft is hollow and encircles concentric control shafts which permit manual operation of internal adjusting and locking mechanisms from outside of the press frame.

Sheet transfer drum for a printing press

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.

Clamping device for optionally securing a blanket or a printing plate

A device for driving an oscillating auxiliary gripper of a printing press includes an eccentric shaft rotatably mounted in 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 rotation with a driven gear being rigidly secured to the eccentric shaft and meshing permanently with a drive gear that rotates with the impression cylinder of the press is arranged to provide positively cooperating drive elements and coaxiality of the input and output shafts for introducing the desired additional motion superimposed upon the continuous rotation of the lifting eccentric of the auxiliary gripper. To this end, an auxiliary cam and main cam are rigidly secured to the eccentric shaft coaxially with the driven gear and are positively connected by way of a double cam follower lever having a pivoted connection in the frame and a pivoted connection through a crank link to the drive or input side of a differential planetary transmission on whose output side the auxiliary gripper shaft is rotatably disposed for oscillation on the eccentric portion of the rotating eccentric shaft.

Planetary transmission device for driving an oscillating auxiliary

A device for turning over sheets in rotary presses of in-line construction, in which the impression cylinders of consecutive printing units cooperate with a single double-size transfer drum with which a storage drum is associated and gripper transfer facilities are provided which consist of cooperating rows of clamping grippers including fixed-position first-printing grippers cooperating with clamping grippers of the storage drum for turning the sheet over at the transfer drum, second-printing grippers which are adjustable with respect to the sheet format, and smoothing devices adjustable with respect to the sheet end are disposed after the clamping grippers on the storage drum as viewed in the direction of rotation.

Device for turning over sheets in rotary 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 adjusting shaft is disposed concentrically within the pivot shaft and is rotatable by an adjusting wheel, the adjusting shaft being formed with axially spaced recesses corresponding to the number of gripper supports and having a plurality of arcuate adjusting surfaces preferably offset at 60.degree. in the peripheral direction to one another to provide a multistep vertical adjustment to the gripper support.

Vertically adjustable gripper supports for the grippers of reversing

A cutting assembly for a sheet fed printing machine having a feed drum for supporting individual sheets and feeding them one after another to the impression cylinder for printing by the blanket cylinder, including a knife blade having a cutting edge, a knife blade support, an arm for mounting the support adjacent the feed drum, the arm being pivoted about an axis parallel to the axis of the feed drum for limited rocking movement toward and away from the feed drum, a stop and a clamp for establishing a reference cutting position for the arm, the feed drum having an anvil extending around its periphery cooperating with the edge of the knife blade for cutting of the sheet as the feed drum rotates, way surfaces between the knife blade support and the arm for guiding the knife blade support for movement in the plane perpendicular to the feed drum and along a path of adjustment which bears a shallow angle to a line of tangency to the feed drum, and a manually operated adjusting screw effectively interposed between the arm and the knife blade support for adjusting the knife blade support along its path of adjustment thereby to vary the degree of engagement of the knife blade with respect to the anvil surface.

Sheet-fed printing machine with means for cutting sheets longitudinally

The turning cylinder and storage cylinder in a perfecting printing press is provided with changeover mechanisms having spring-loaded electromagnetically releasable latches and sensors for detecting latched adjustments. Moreover, a contactless sensor is provided for detecting clamping of the calendering suckers in the storage cylinder even when the cylinder is rotating. Contactless proximity switches determine the correct phase adjustments between the storage cylinder and the turning cylinder for both perfecting and first form printing. An access door and interlock guarantees that the cylinders are turned to a normal position and braked before the access door is opened, and the access door cannot be closed for subsequent printing until changeover has been completed. An indicator array indicates the sequence of adjustments to follow and abnormal conditions.

Changeover protection system for perfecting printing machines

In a rotary printing machine, an arrangement for mounting an applicator roller and a preceding roller in a fluid feed stream journals the applicator roller and the preceding roller to the printing machine frame with substantial bearing play, and spring loads the applicator roller against the bearing surface away from the plate cylinder. On passing through the cylinder gap the applicator rollers of inking, damping or varnishing units in sheet-fed offset presses are jolted both at the start and end of the gap. The resulting different flattening of the soft applicator rollers causes roller marks, which should be avoided. For this purpose the applicator roller and the preceding roller are braced against each other by springs, so that their bearing play is eliminated and the distance between shafts is constant. This condition is also maintained on passage through the gap. Conveyance of liquid between applicator rollers and the preceding rollers is thus constant.

Arrangement for prevention of roller marks on roller units in a printing

A delivery mechanism for a sheet fed printing press in which a rear edge guide in the form of a traverse member guides the rear edges of the downwardly settling sheets into a condition of register. A brake assembly is provided for engaging the trailing edges of the sheets to decelerate them, the assembly being horizontally adjustable to accommodate sheets of different length and the traverse member being coupled by linkage to the brake assembly for simultaneous adjustment therewith. An intermediate stacking mechanism is provided having a horizontal frame and an intermediate pile receiver which is shiftable between a receiving position and an out-of-the-way position for temporarily accumulating sheets during a pile change. Detent assemblies at the ends of the traverse member lock the traverse member to the frame following horizontal adjustment. The frame of the intermediate stacking mechanism is adjustable in vertical position and the linkage for connecting the traverse member to the braking assembly is vertically extensible, being in the form of a pantograph, so that the traverse member serves as a positively positioned rear edge guide for both (a) the sheets deposited to form the intermediate pile and (b) the sheets subsequently deposited thereon to form a main pile thereby to maintain the rear edges of all of the sheets in register.

Device for registering the rear edges of the sheets in sheet delivery

A device for application of lacquer or the like to a sheet in a printing press. The lacquer is applied by an applicator cylinder having an associated applicator roller. Lacquer is fed from a fountain having a fountain roller which is slowly driven, the lacquer being transferred from the fountain roller to the applicator roller either directly or through intermediate rollers to form a nip in which the lacquer tends to build up. The amount of lacquer transferred by the fountain roller per unit time is determined by a metering roller which engages the fountain roller. A sensing device located at the nip senses the level of lacquer buildup and produces an output signal upon departure of the building from an optimum level. In one embodiment of the invention the output signal is utilized to bring about a corrective adjustment in the position of the metering roller so that the buildup at the nip tends to be restored to optimum level. In another embodiment the output signal sounds an alarm and, if desired, brings the press to a stop so that the situation can be corrected before the applicator cylinder runs dry.

Device for applying a fluid, in particular lacquers on printed sheets or

An inking unit for a printing press including a source of ink, a set of ink transfer rollers for establishing an ink film, a distributor roller vibrated endwise for distribution of the ink film and a form roller for applying the ink film to a plate on the plate cylinder. The form roller has a shaft and an outer cylindrical shell, the latter being rotated by surface engagement. A bearing between the shaft and the shell permits relative axial as well as rotational movement. A cam of the cylindrical, or drum, type mounted on the shaft has an endless wavy groove in which is received a cam follower in the form of a roller extending radially inwardly from the sleeve so that the sleeve reciprocates through a single cycle as a result of a single relative rotation of the shaft. The shaft is driven at a speed which causes the frequency of vibration of the form roller to differ from the frequency of vibration of the distributor roller so that the ghost image on the form roller is constantly being displaced and dissipated both peripherally and axially with respect to the image on the plate resulting in substantially ghost-free printing. A clutch is provided for remote switching between two modes of operation.

Growing community of inventors

Offenbach am Main, Germany

Paul Abendroth