Abstract: The invention concerns a printing apparatus including a cylinder, mounted in side walls, that has a sleeve-shaped sheath that can be replaced through an opening in a side wall. The object of the invention is to develop a printing apparatus in which replacement of a sleeve-shaped sheath is simplified, and the risk of damage to the sheath is reduced. The invention proposes that a detachably attached sheath (19) that projects laterally from the cylinder (1) on the side toward the opening be provided on the enveloping surface (18) of the cylinder (1); that a holding apparatus (23, 24, 25, 26, 28), which can be set against and moved away from the interior of the projecting part (21) of the sheath (19), be provided for the sheath (19), the holding apparatus (23, 24, 25, 26, 28) being physically integrated with a bearing element (16) of the cylinder (1); and that in order to replace the sheath, the bearing element (16) can be positioned in a location which uncovers the opening.

Abstract: A device for conveying thin workpieces in a machine used in printing technology, which device includes at least one moving conveying element, on whose surface are formed areas of changing charge density, the adherence of the workpiece on the conveying element being supported by electrostatic forces wherein contacts are provided for forming the areas of changing charge density, the contacts touching the conveying element and being connected to at least one voltage source, and an electric current flow being present, via the contacts in the material of the conveying element.

Abstract: A printing machine comprising a plurality of printing units (3) arranged in line one behind the other and an endless transport belt (4) for substrates to be printed, said transport belt running around, at least, two spaced-apart rollers (5, 6) and past said printing units. At least, two rollers (5, 6) are mounted on a coherent belt-carrying unit (9) from which, when being in a slack condition, said transport belt (4) may be stripped off. Furthermore, the printing machine features a drawer (24) which may be pulled out laterally and which is provided below said belt-carrying unit (9) as well as a holding device (11, 12, 13, 15, 16) holding said belt-carrying unit (9) and being switchable between, at least, two different conditions, in a first condition said holding device holding said belt-carrying unit in an operating position, and in a second condition said belt-carrying unit (9) resting loosely on said drawer (24). This permits a simple and quick belt changing.

Abstract: A sheet-fed printing press includes a plurality of printing units disposed along a sheet-transport path. A transport apparatus (3, 33, 40, 50, 66, 78) is disposed along the sheet-transport path. The sheets are transported through the printing units along the sheet-transport path and, after recto-printing, they are returned along a return-transport path which extends essentially in an opposite direction to the sheet-transport path. The printing press is thus enabled to print recto-and-verso while having a very short structural length.

Abstract: Method for supplying a printing unit of a printing press with ink which is solid at normal temperature includes supplying the printing unit with ink in the form of solid bodies, and melting the solid ink bodies in the printing unit and applying the ink in a molten state to a cylinder of the printing unit.

Abstract: A printing press has a plurality of in-line printing units in which substrates are transported along a rectilinear transport path. The printing units include several recto printing units and several verso printing units disposed along the transport path. A transport system, which transports the substrates through the printing units along the straight transport path, includes a first transport apparatus through the recto printing units, and a second transport apparatus through the verso printing units. A feeder assembly feeds the substrates to be printed from a feeder pile to the transport system. The feed by the feeder also follows a straight path which is coplanar with the path through the printing units. It is thus possible to print not only bendable substrates, but also rigid and stiff substrates such as carton, plastic, sheet metal, glass, and the like. The system further includes a turning apparatus for turning the substrates between the recto printing units and the verso printing units.

Abstract: Transfer cylinder with an electromotive drive unit includes a common bearing for a rotor of the electromotive drive unit and for the transfer cylinder, the bearing being disposed in a unit of a printing press supporting the drive unit and the transfer cylinder.

Abstract: Device for feeding a printing plate to a plate cylinder of at least one printing unit of a printing press, the plate cylinder having a clamping device formed with clamping surfaces for clamping a leading edge of the printing plate therein, includes at least one element for holding and guiding the printing plate, the one element being a readily rotatable roller having an outer cylindrical surface which, in a plate-changing position, is disposed substantially tangentially to a straight line disposed between the roller and the one printing unit, the straight line extending parallel to the clamping surfaces of the clamping device, passing between the clamping surfaces and leaving the one printing unit in an upwardly inclined direction.

Abstract: Device for feeding a printing plate to a plate cylinder of at least one printing unit of a printing press, the plate cylinder having a clamping device formed with clamping surfaces for clamping a leading edge of the printing plate therein, includes at least one element for holding and guiding the printing plate, the one element being a readily rotatable roller having an outer cylindrical surface which, in a plate-changing position, is disposed substantially tangentially to a straight line disposed between the roller and the one printing unit, the straight line extending parallel to the clamping surfaces of the clamping device, passing between the clamping surfaces and leaving the one printing unit in an upwardly inclined direction.

Abstract: Holding device for a plate which is to be displaced and which is formed with a hole includes a suction cup having a sealing, elastic suction lip for sealing off a space within the suction cup when the plate is pressed against the suction lip, in a plate-holding condition of the holding device, the suction lip being formed of a material having good sliding properties and, in the plate-holding condition of the holding device, being disposed relative to the hole formed in the plate so that, upon a sliding displacement of the plate, the hole formed in the plate passes the suction lip and into the space within the suction cup, in a plate-releasing condition of the holding device.

Abstract: A plate changing device including a roller disposed parallel to a plate cylinder having a plate lock-up device, fixed positioning device for pressing the roller against the plate cylinder and for inserting a rear edge of a printing plate into the plate lock-up device, and fixed guide means extending in a direction in which the rear edge of the printing plate is insertable in the plate lock-up device and displaceably supporting the roller at ends thereof.