Windmoller Holscher

Dieter Rogge

Robert Blom

Wilfried Wallmann

Wolfgang Knapheide

Dietmar Koopmann

An apparatus for displacing bearing blocks which are mounted on carriages and which support shafts to be displaceable on a common carriage guideway, preferably for the displacement of bearing blocks of plate cylinders and inking rollers of an inking unit in carriage guideways of the inking unit brackets of a multicolour rotary printing press, with two lead screw drives driven by two electric motors, preferably stepper motors. Each bearing block is provided with a nut into which there is respectively screwed one lead screw assigned to each of the bearing blocks. Each of the two lead screws is provided with one lead screw drive each, fixed to the frame at the end zones of the carriage guideway lying opposite each other.

Apparatus for displacing two bearing blocks mounted on carriages

A doctor device for the washing inking unit of a rotary printing press includes a doctor carrier, on which two doctor blades are attached. The doctor blades are parallel to and coextensive with each other and are able to be put into engagement with an inking roller. Together with the inking roller, the doctor carrier and sealing means provided at the end thereof, the doctor blades define a sealed ink chamber. The ink is supplied to and removed from the ink chamber through ducts. The doctor carrier is able to be brought into engagement with the inking roller by sealing moldings. In order to ensure that no ink is able to escape from the ink chamber, even when the doctor device oscillates, the sealing moldings are formed of elastic or elastomeric material, which, on their sides facing the inking roller, have dihedral, downwardly sloping surfaces for supporting the end parts of the doctor blades. Between the dihedral surfaces, a curved sealing surface is provided. The curved sealing surface has the shape of a cylindrical shell and is able to be brought into engagement with the inking roller. The sealing surface has a radius of curvature corresponding to the inking roller.

Doctor device for the self-washing inking unit of a rotary printing press

A bearing holder for bearings mounted on journals includes a lower support socket secured to a frame, and a cover part pivotally connected with the socket. The cover part is able to be locked in a shut position, folded onto the bearing positioned in the support socket. In order to provide a bearing holder of this type, which makes possible the removal and insertion of the journals without releasing the cover parts by hand, and without having to be pivoted and locked for the purpose of opening and shutting, cover parts are pivotally bearinged on two upper lateral parts of the support socket about axes which are parallel to the journal. Such cover parts include an upper, longer arm and a lower, shorter arm of a two-armed lever. The lower arm forms an actuating part, which, in the folded back, opened position of the cover part, extends into the interior of the support socket, so that by lowering the bearing, which abuts against the same and is placed on the journals, into the support socket, the bearing pivots the cover parts into its shut position, in which the latter has its inner, arcuate sides in snug engagement with the bearing. Thus, the cover parts which, in this manner, are folded into their shut setting, and have their end faces abutting against each other, are provided with an automatic device locking the cover parts together.

Bearing holder for bearings mounted on journals

This invention relates to an apparatus for displacing shaft-mounting bearing stands, which are secured to carriages, in carriage guides, preferably for displacing the bearing stands of plate cylinders and inking rollers of a printing unit in carriage tracks of the inking unit supports of a multicolor rotary press, comprising screw drives, which are driven by electric motors. To solve the object to provide such an apparatus in which shafts and particularly plate cylinders and associated inking rollers can mutually independently be displaced relative to each other and, e.g., relative to an impression cylinder, the invention resides in that a screw that extends parallel to a single carriage track is rotatably mounted in the machine frame or on the inking unit support and is provided with a drive. A nut which is non-rotatably and axially immovably connected to a bearing stand or to a carriage is mounted on the screw. At least one additional nut is mounted on the screw and is rotatably and axially immovably connected to at least one additional bearing stand or to the associated carriage and is connected to a separate drive.

Apparatus for displacing shaft-mounting bearing stands

A rotary press comprises one or more impression cylinders (1) and a plurality of printing units, each of which comprises an inking unit (I) and an endless block belt (4). The block belt (4) is trained around a plurality of cylinders (5, 6, 7, 8), one of which (7) is movable into engagement with an associated impression cylinder (1). In the rotary press, the block belt of each printing unit is trained around four cylinders, which are disposed at the corners of a square or parallelogram. Two diametrically opposite ones (7, 8) of the cylinders are movable into engagement with the inking unit (I) and a picture-carrying web or an associated impression cylinder, and the two other diametrically opposite cylinders (5, 6) are tensioning cylinders, which are movably mounted in tracks (31) and, by a drive device (39), are movable toward and away from each other.

Rotary press comprising an endless block belt

A printing machine, such as a flexographic printing machine has a plurality of inking units and a plurality of plate cylinders. A central gear drives an impression cylinder and during a printing operation meshes with plate cylinder gears. The plate cylinders are mounted on plate cylinder carriages on tracks included in the machine frame and which are movable towards the impression cylinder for a printing operation. Halftone ink roller gears are associated with halftone rollers of the inking units and mesh with the plate cylinder gears. The halftone rollers are movable on inking unit carriages on tracks on the plate cylinder carriages. The teeth of the central gear are to be aligned with the teeth of the plate cylinder gears when the latter teeth are moved to pushed-in positions. The plate cylinder gears are provided with datum marks with which sensors fixed to the inking carriage cooperate so that the plate cylinders can be aligned for printing in register. To ensure that an adjustment for printing in register can be effected with high accuracy, without errors and without a need for manual work, each plate cylinder gear is equipped with a servomotor which rotates the plate cylinder gear to a position in which the respective sensor detects the respective datum mark.

Printing machine

In a printing press having a plurality of inking mechanisms and plate cylinders with backing cylinders driven by a common central gear, the plate cylinders, inking mechanisms and inking cylinders (if any) are mounted on carriages which can be moved towards and away from the central gear. The shafts of respective upper and lower backing cylinders are mounted at the ends of two-armed levers which intersect in pairs, are pivotably mounted on the central shaft of the central gear and are provided with means for pivoting same in opposite senses or directions.

Printing press

To facilitate exchanging the plate cylinders in a flexographic printing press, ink roller blocks and bearings for the plate cylinders are movable by controlled drives on guides substantially tangentially to the impression cylinder to limiting positions suitable for the new plate cylinder sizes and at which the plate cylinder gears are axially displaceable to engage the gears of the inking rollers and the impression cylinder gear. The plate cylinders are displaceable in their bearings between a printing position and an inoperative position at which said gears are still in mesh.

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Lengerich, Germany

Dieter Rogge