Abstract: A method and device for producing a permanent as well as erasable image on a printing plate, in particular within a printing press, is disclosed. A printing plate with a rewritable and erasable surface is made available. The surface of the printing plate made available is erased and a permanent and erasable image is created on the erased surface. Following the erasing of the surface, the surface is imaged, gummed and fixed, namely in such a way that, on the one hand, the imaging and the gumming and the fixing occur relative to the erasing in a chronologically sequential and spatially sequential manner, and that, on the other hand, the imaging and the gumming and the fixing each occur relative to one another in a chronologically parallel but spatially sequential manner.

Abstract: A printing unit with at least one plate cylinder and a set-up device, which can be moved from a rest position to the plate cylinder, is disclosed. In order to make good accessibility to the printing couples and to the set-up device possible, the set-up device is arranged in a frame, which can be moved perpendicularly to the axis of rotation of the plate cylinder.

Abstract: A printing press and a method for operating the printing press is disclosed. The press has at least one printing unit including at least one printing couple with a transfer cylinder, a form cylinder carrying an imageable and de-imageable printing form, an inking couple and a dampening unit. A memory is assigned inside the printing press to at least one printing unit having several memory locations for form cylinders, where the form cylinders for the printing units can be transferred automatically by at least one transport device between a printing couple of the printing unit and a memory location of the memory, where the form cylinders can be transferred automatically inside the memory between the various memory locations, and where an imaging device is assigned to at least one memory location to image and de-image in advance an imageable and de-imageable printing form positioned on a form cylinder.

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: 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: 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: A method and apparatus for applying a medium, especially a conditioning medium or a rubber covering medium, to a printing form positioned on a form cylinder, especially to a rewritable and erasable printing form, is disclosed. The medium is applied to a rubber covered cylinder or to a separate applicator roll or an applicator cylinder for the medium, the medium then being transferred from the rubber covered cylinder or applicator roll or applicator cylinder to the form cylinder, in this case the rubber covered cylinder, the applicator roll or the applicator cylinder rolling repeatedly over the form cylinder in order to ensure a uniform application of the medium to the printing form.

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: 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 complete cleaning system for printing cylinders within a rotary printing press, by which a reactive erasing of ink-bearing layers, including the removal of filling materials from a gravure printing form, and a cleaning of ink from all form and transfer cylinders are possible during the printing process or during printing pauses. At least one erasing device is provided which emits a jet of water under pressure that can be directed against the corresponding outer surface of each desired cylinder so that, on the one hand, all traces of ink can be removed and, on the other hand, a reactive erasing of ink-conducting layers including filling materials from a gravure printing-form cylinder is possible.

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: 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: 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: 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 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 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: A printing unit is provided for a web-fed rotary printing machine, having a plurality of cylinders with associated drive motor, an additional device for printing an at least two guide elements. At least one cylinder is a plate cylinder. At least one guide element corresponds to the plate cylinder and is operably arranged in the printing unit for determining a setting path of the corresponding plate cylinder relative to the other cylinders. This guide element extends as far as the additional device for printing.