Abstract: A process for the production of a printing form, especially within a printing press, where a permanent and erasable image is provided on the rewritable surface of a printing form by means of the following steps: (a) the preparation of a printing form with a rewritable surface; (b) the all-over application of a rubber coating to the rewritable surface of the printing form; (c) the image data-oriented removal of the previously applied rubber coating; (d) the image data-oriented application of an imaging polymer to the surface in the areas from which the rubber coating was previously removed; and (e) the all-over fixation of the imaged surface.

Abstract: An apparatus for applying a conditioning solution, a rubber-covering solution, or a medium for producing an image-differentiating layer, to a surface to be coated, in particular to a rewritable and erasable printing forme positioned on a forme cylinder of a press, includes a coating roller which applies the fluid to the surface to be coated. The coating roller rolls on the surface to be coated and simultaneously executes a translational movement along an axis of rotation of the coating roller relative to the surface to be coated. A smoothing roller which evens out a layer thickness of the fluid on the coating roller rolls on the coating roller. The coating roller has a dry or fluid-free section at the front, in the direction of the translational movement, and a rear section, wherein a device applying the fluid to the coating roller applies to fluid only to the rear section.

Abstract: In order to make handling easier, an apparatus for pulling a sleeve onto and off a printing-press cylinder has a head piece (8) having a positioning device (13) for defining the position of the head piece (8) with respect to the cylinder (1), a connecting device (14, 15) for fixing the head piece (8) to the cylinder (1), and a centering device (12) for defining the position of the sleeve (2) with respect to the head piece (8) and a deposition bar (9) for the sleeve (2), which deposition bar (9) is attached to the head piece (8).

Abstract: A web-fed printing machine is provided. The printing machine includes a plurality of printing units. A first work station precedes the printing units. A second work station follows the printing units. At least one lifting device is assigned to the printing units for transporting printing unit modules. The lifting device is movably mounted on a top side of the printing units.

Abstract: An apparatus for transporting printing sleeves is provided. The transport apparatus includes a housing with a bottom wall, a plurality of side walls, and at least one cover. A plurality of reception devices are mounted in the housing. Each reception device receives a printing sleeve in a vertically oriented transport position with a longitudinal mid-axes of the respective printing sleeve extending vertically. Each reception device is movable out of the housing into an outside position when the at least one cover of the housing is open. Each reception device is pivotable in the outside position such that the corresponding printing sleeve can be moved out of the vertical transport position into a horizontal extraction or insertion position.

Abstract: The invention provides an apparatus for the mounting and/or demounting of at least two printing sleeves outside a printing unit of a printing machine. The printing sleeves include an outer printing sleeve forming a printing surface and an inner printing sleeve providing diameter compensation between the outer printing sleeve and an impression cylinder of the printing machine. The apparatus having a reception device onto which an inner printing sleeve can be pushed for mounting the two printing sleeves. The apparatus having at least one compressed-air device for facilitating the fixing of the inner printing sleeve on the reception device and for conducting compressed air through orifices assigned to the inner printing sleeve in order thereby to make it possible for an outer printing sleeve to be pushed more easily onto the inner printing sleeve.

Abstract: In an apparatus for producing a printing image on a printing medium held by a cylinder (1) by a laser, the laser writing head (7) of which is positioned on a crossmember (3) so as to be displaceable parallel to the axis of the cylinder (1), a space-saving functionally reliable embodiment is attained by the fact that a protective switch (10) which detects the presence of a cylinder (1) is provided fixedly on the crossmember (3) and the crossmember (3) bears switching strips (5, 6) which expose a laser writing head displacement region (b) between them having the width of the printing image (8) and interact with a further protective switch (11) attached to the laser writing head (7) for switching off the laser when it is situated outside the laser writing head displacement region (b).

Abstract: In an apparatus for pulling off sleeves (11, 14) which are applied to cylinders (10, 15) of a printing press, a force for pulling off the sleeve is applied in a gentle manner, in that a retaining rod (5), having a retaining head (1) which can be fixed to the sleeve (11, 14), and a hammer weight which can be moved along the rod (5) between stops (7, 9) are provided.

Abstract: An apparatus for cleaning and/or removing images from surfaces, in particular from roll or cylinder surfaces or printing forms is provided. The cleaning apparatus includes one or more blasting nozzles for discharging water in the form of crystalline ice particles or CO2 particles/pellets onto the surfaces to be cleaned. The discharging crystalline ice or CO2 particles effectively remove dirt particles or ink-carrying polymers from the surface to be cleaned. The dislodged material and the waste ice, which may have changed into water droplets, are removed from the surface and taken away.

Abstract: An apparatus for mounting a printing sleeve on a press cylinder includes an inherently stiff annular holding element having an inner shape which is matched to the outer shape of the sleeve, and mutually facing ends defining a slit having a width. At least one clamp urges the ends toward each other to form a butt joint, so that the holding element can clamp the sleeve with a clamping force which is limited by the width of the slit. A device is provided for expanding the holding element so that the clamping force on the sleeve can be released.

Abstract: An aligning apparatus for heavy loads, in particular a printing unit, includes at least one support plate, which is rotatably mounted on a base plate screwed to an erection surface and can be positioned on the base plate with regard to its horizontal position by means of adjusting screws. Each support plate interacts with a vertical adjusting screw which is provided for adjusting the vertical position of the printing unit and can be fixed to the printing unit, each vertical adjusting screw being designed with a spherical end which is supported on the plate in a spherical recess designed with little play or as a locating fit.

Abstract: In order to manufacture a cylinder of a rotary printing machine cost-effectively, its cylinder body is assembled from a cylinder casing and a first and second side part located at the ends of the cylinder casing, one and the same first and second side part being capable of being completed in order to produce different cylinders casings of different outside diameters.

Abstract: Apparatus for producing printing plates in particular a blank sleeve-like printing plate, includes a cylinder carrier for receiving a printing plate, the cylinder carrier being held in cantilever fashion at one end in a frame in a mounting and is driven by a motor, it being possible for the printing plate to be pushed onto the carrier cylinder at an opposite side of the latter which faces away from the mounting and is, therefore, more accessible for making printing plate exchange. An image-setting device is moved along the carrier cylinder.

Abstract: A first structural unit includes a laser image-setting head, and a second structural unit includes a loading compartment to accommodate a cassette housing having a thermal transfer ribbon on spools having hubs. After a cassette is inserted in the loading compartment, the compartment is closed so that drive rollers engage the hubs without play. To produce a printing plate, the second structural unit is then brought over the first structural unit in the manner of a telescope by a moving device, and the thermal transfer ribbon is brought to the laser image-setting head. The thermal transfer ribbon inserted into the loading compartment is guided by self-centering means so that it does not contact the cassette housing, and is positioned with respect to the plate cylinder by guide rollers. Wear-free and therefore fast ribbon guidance can be performed, and automation of the movement sequences of the thermal transfer ribbon can be achieved.

Abstract: In the installation and removal of a cylinder of a printing machine, in which the cylinder has a middle drum and two lateral bearing stubs which are capable of being secured releasably to the drum and of being connected to one another by means of a central spindle which passes through the drum and which, at least at one end, can be screwed, by means of a screw connection provided within the outer circumference of the spindle, to the adjacent bearing stub which, with the screw connection released, can be removed, together with its bearing housing, at least to an extent such that the drum is accessible from the side, a high degree of safety and a time saving can be achieved in that, for the change, the drum of a cylinder is released from the bearing stubs and one bearing stub is removed, after which the consequently exposed end of the spindle of the cylinder has connected to it, in the same way as the removable bearing stub, a spindle extension, onto which the drum is pushed and which is then released from the

Abstract: Rotary printing machine with forme and impression cylinders for variable-format or variable-circumference printing and with service apparatus which are capable of being moved radially in relation to the printing-unit cylinders for throw-on or throw-off movements and in the axial direction of the cylinders or in the side-wall plane. The service apparatus and the printing-unit cylinders are arranged on cross slides which can each be moved in two directions relative to the printing-unit side wall.

Abstract: In order to provide a stand of a printing unit of a rotary printing machine, said stand being capable of being produced cost-effectively and having high inherent rigidity, a left-hand and a right-hand side wall are placed onto a bottom plate and screwed to the latter and are also provided with a cover plate, the cover plate resting with first locating faces on the side walls and with second locating faces against the side walls, the cover plate being screwed to the side walls at all the locating faces.

Abstract: In order to manufacture a cylinder of a rotary printing machine cost-effectively, its cylinder body is assembled from a cylinder casing and a first and second side part located at the ends of the cylinder casing, one and the same first and second side part being capable of being completed in order to produce different cylinders with cylinder casings of different outside diameters.

Abstract: A rotary printing machine having a plurality of printing-unit cylinders mounted one above another on a side wall, their axes lying in a plane inclined with respect to the plane of the printing-material web. An image-setting device is arranged wholly within the range of the obtuse angle which is formed by the plane of inclination of the cylinders and the plane of the printing-material web.

Abstract: A feed assembly is provided which feeds a pressure medium to a cylinder and fixes the cylinder in position, independently of whether or not the pressure medium to be connected is supplied. A feed part can be placed on a feed opening of the cylinder by an actuating element which can be controlled independently of any control of the pressure medium. An outlet of the feed part and the feed opening engage one another and lock the cylinder against rotation.