Abstract: A device for producing a coating on printed products from a printing press is provided. The coating device can be actuated digitally via printing image data thereby allowing the coating motif to be designed in a variable manner The coating device can include an inkjet printer in the form of an inkjet head array or an inkjet head bar acting as a varnishing unit that operates line-by-line on large-format printing material. The coating device can also be integrated in a rotary press having a varnishing unit for coating a printing material that has been processed in the printing press. The coating device can also be integrated with a dryer. The printing material can be passed under the outlet openings of the inkjet heads and the dryer can be arranged directly after the inkjet printer in the transport direction of the printing material in order to dry the liquid coating material on the printing material after the application.

Abstract: A flexo printing screen roller having a surface, which has cells which can be filled with ink or paint, is disclosed. The cells have different depths in order to apply ink or paint of varying thickness to a flexo printing form and thus ultimately to a substrate to be printed.

Abstract: A device for producing a coating on printed products from a printing press is provided. The coating device can be actuated digitally via printing image data thereby allowing the coating motif to be designed in a variable manner The coating device can include an inkjet printer in the form of an inkjet head array or an inkjet head bar acting as a varnishing unit that operates line-by-line on large-format printing material. The coating device can also be integrated in a rotary press having a varnishing unit for coating a printing material that has been processed in the printing press. The coating device can also be integrated with a dryer. The printing material can be passed under the outlet openings of the inkjet heads and the dryer can be arranged directly after the inkjet printer in the transport direction of the printing material in order to dry the liquid coating material on the printing material after the application.

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 simplify the sequence of creating a mask, in particular for producing a printing plate, and at the same time to improve the quality of the printing plate produced by means of a mask, the use of laser-induced thermal transfer is provided. The structure information is applied directly to the surface of a printing plate carrier during the creation of a mask, by means of a thermal transfer film and a laser image-setting unit, so that by means of the structure information applied, differentiation with regard to image points and non-image points can be carried out directly in order to produce a printing plate.

Abstract: To provide a varnishing apparatus for indirect printing with the lowest possible structural outlay, a varnishing mechanism of the varnishing apparatus for varnishing webs includes a form cylinder and a transfer cylinder, the web running between the transfer cylinders. At least one of the form cylinders bears a gravure printing form such that the web may be varnished on one or both sides.

Abstract: In order to provide a rotary printing machine for direct printing, in which the printing-assembly cylinders are guided in a stable manner by means of a cost-effective device, the forme cylinder and the impression cylinder of a printing assembly are mounted, adjustably in terms of their mutual spacing, in side walls. At least one of the two cylinders is mounted on both sides in slides movable on straight guide elements which are arranged in each case on at least one of two opposite panels of an aperture in the side walls.

Abstract: In order to provide a rotary printing machine for direct printing, in which the printing-assembly cylinders are arranged in a space-saving way, there is arranged in side walls at least one double printing assembly containing two form cylinders which are located one above the other, each having its own drive motor and between which at least one impression cylinder is arranged, a web being printable between a form cylinder and an impression cylinder. Each form cylinder and the impression cylinder cooperating with the latter are mounted, adjustably in terms of their mutual spacing, in side walls of the printing unit. For this purpose, the adjustable cylinders are mounted on both sides in slides which are moveable on guide elements fastened to the side walls.

Abstract: A process and apparatus for gravure printing of an image using an erasable and reusable gravure form including a gravure blank form having a base screen which is designed for accommodating a maximum amount of ink to be transferred. The depressions of the base screen of the gravure blank form are uniformly filled with a liquefiable substance using an applicator device and material is then removed from the depressions in conformity with the intended image using thermal energy applied by an image-point transfer device. The printing form is then linked using an inking system and, finally, is regenerated after the printing process to produce a gravure blank form, wherein the depressions of the base screen are again filled in a uniform manner.

Abstract: To provide a varnishing apparatus for indirect printing with the lowest possible structural outlay, a varnishing mechanism of the varnishing apparatus for varnishing webs includes a form cylinder and a transfer cylinder, the web running between the transfer cylinders. At least one of the form cylinders bears a gravure printing form such that the web may be varnished on one or both sides.

Abstract: A process for gravure by means of an erasable and reusable gravure form proceeds from a gravure blank form with a base screen which is designed at least for the maximum amount of ink to be transferred. The depressions of the base screen of the gravure blank form are uniformly filled with a liquefiable substance by means of an applicator device and material is then removed from the depressions in conformity to the intended image by means of thermal energy applied by an image-point transfer device. The printing form is then inked by means of an inking system and, finally, is regenerated after the printing process to produce a gravure blank form, wherein the depressions of the base screen are filled again in a uniform manner.

Abstract: In order to provide a rotary printing machine for direct printing, in which the printing-assembly cylinders are arranged in a space-saving way, there is arranged in side walls at least one double printing assembly containing two form cylinders which are located one above the other, each having its own drive motor and between which at least one impression cylinder is arranged, a web being printable between a form cylinder and an impression cylinder. Each form cylinder and the impression cylinder cooperating with the latter are mounted, adjustably in terms of their mutual spacing, in side walls of the printing unit. For this purpose, the adjustable cylinders are mounted on both sides in slides which are moveable on guide elements fastened to the side walls.

Abstract: In order to provide a rotary printing machine for direct printing, in which the printing-assembly cylinders are guided in a stable manner by means of a cost-effective device, the forme cylinder and the impression cylinder of a printing assembly are mounted, adjustably in terms of their mutual spacing, in side walls. At least one of the two cylinders is mounted on both sides in slides movable on straight guide elements which are arranged in each case on at least one of two opposite panels of an aperture in the side walls.

Abstract: In order to simplify the sequence of creating a mask, in particular for producing a printing plate, and at the same time to improve the quality of the printing plate produced by means of a mask, the use of laser-induced thermal transfer is provided. The structure information is applied directly to the surface of a printing plate carrier during the creation of a mask, by means of a thermal transfer film and a laser image-setting unit, so that by means of the structure information applied, differentiation with regard to image points and non-image points can be carried out directly in order to produce a printing plate.

Abstract: The invention relates to a sheet-fed rotary printing machine with printing units for multi-color printing and with at least one coating unit. The object of the invention is, inter alia, to provide a sheet-fed rotary printing machine of the type described in the introduction, in which at least one coating unit can be used more universally and set-up times are reduced. This is achieved in that the coating unit 2, 3 is formed from an impression cylinder 10, a form cylinder 12 and a metering system 14 with a screened applicator roller 13. The applicator roller 13 has a circular segment congruent to the cylinder pit of the form cylinder 12, is at least the same size as the form cylinder 12 and can be imaged as a rough intaglio printing form.

Abstract: A device for filling depressions in a cylinder of a printing machine with a fluid, e.g., an ink, which permits a quick change to a different fluid, includes at least two doctor blade devices arranged on the cylinder which doctor blade devices can be selectively moved individually into effective connection with the cylinder.

Abstract: Starting from a blank gravure form, a filling step and a subsequent imaging step are carried out to produce a printing form. In the filling step, depressions are evenly filled with a UV printing ink by an application device, and the UV printing ink is then solidified by a UV drier. In the imaging step, solidified UV printing ink is removed from the depressions in accordance with the image by thermal ablation. The gravure form screened in accordance with the image is then inked with UV printing ink by an inking system. For reuse, the gravure form undergoes an erasure step that uses UV printing ink.

Abstract: A web-fed rotary printing machine having a plurality of directly adjacent printing units. Each of the printing units has only one side wall, in which the printing group cylinders are float mounted. The printing units are arranged in-line with no working space between them.