Abstract: A web-fed printing press, wherein the printing couple or each printing couple comprises a form cylinder, a transfer cylinder (10), an inking couple, and preferably a dampening unit, wherein a transfer system is assigned to the transfer cylinder and a printing form system is assigned to the form cylinder, and wherein the transfer system (11) and/or the printing form system includes plural rubber sleeves (13, 14) positioned in the axial direction on the transfer cylinder and/or the printing form system includes plural form sleeves positioned in the axial direction on the form cylinder. The transfer cylinder (10) and/or the form cylinder have at least three independent compressed air systems (19, 20, 21) for installing the rubber sleeves (13, 14) and/or the printing form sleeves, on the respective transfer cylinder and/or the form cylinder, and also to remove the sleeves from the respective cylinder.

Abstract: A method for compensating for a thermally induced deformation of press cylinders which occurs during a printing operation in a well-defined circumferential area of the radially outer surface of the cylinder includes controlling the temperature of a well-defined circumferential area of the press cylinder to compensate for the deformation.

Abstract: A sleeve, in particular a rubber-blanket sleeve, for a printing press is disclosed. The sleeve having a construction which has at least two layers, having an inner layer which is configured as a carrier layer and an outer layer which is configured as a covering layer and serves for pressure transfer, the sleeve having a hollow-cylindrical design with a cylindrical inner surface and a cylindrical outer surface. The inner layer which is configured as a carrier layer is convexly or concavely curved on the radially outer side, a layer which adjoins the carrier layer having a curvature on a radially inner side which is complementary to the curvature of the radially outer side of the carrier layer.

Abstract: A web press with at least one printing couple, where the at least one printing couple or each printing couple is provided with a form cylinder, a transfer cylinder, an inking couple, and preferably a dampening unit, and a transfer system is assigned to the transfer cylinder, and a printing form system is assigned to the form cylinder. The transfer system assigned to the transfer cylinder of the printing couple or each printing couple is constructed with several parts which are disposed along the axial direction of the transfer cylinder.

Abstract: A printing unit cylinder is subject to only low deformation in the event of operationally induced increases in the temperature of the printing unit. At least the barrel of the body of the printing unit cylinder is produced from a metallic material with a linear coefficient of expansion of ?<5×10?6K?1 in a temperature range of from about 20° to about 60°.

Abstract: A form cylinder is provided with a circumferential surface which is convexly curved in the axial direction, such that the convex profile, determined by calculation, of the circumferential surface varies in such a way that the diameter of the form cylinder is largest in the axial center and smallest at the lateral edges.

Abstract: A forme cylinder is provided with a circumferential surface which is convexly curved in the axial direction, such that the convex profile, determined by calculation, of the circumferential surface varies in such a way that the diameter of the forme cylinder is largest in the axial center and smallest at the lateral edges.

Abstract: In order to reliably tension the legs of the carrier plate by means of tongues fastened to spindles, one spindle is designed as a hollow spindle which is mounted in a bore of the cylinder gap of the printing-unit cylinder, and the other spindle is mounted in the hollow spindle.

Abstract: In order to reliably tension the legs of the carrier plate by means of tongues fastened to spindles, one spindle is designed as a hollow spindle which is mounted in a bore of the cylinder gap of the printing-unit cylinder, and the other spindle is mounted in the hollow spindle.

Abstract: A printing plate made of rolled sheet metal strip for extra-wide machines with an increased service life is made having a length and width arranged obliquely to the rolling direction of the sheet metal. A process for producing rectangular panels from rolled sheet metal strip with main directions running obliquely with respect to the rolling direction to produce such printing plates includes cutting the sides of the rectangular panels obliquely to the rolling direction of the sheet metal strip.

Abstract: A device for reliably and economically moving two doors that are movably mounted on a side wall of a printing group in a rotary printing machine for closing openings in the side wall that are proximate printing group cylinders mounted in the printing group, includes a toggle lever articulately connected between each of the two doors and the side wall and is operated by a selectively actuatable working cylinder.

Abstract: An arrangement for fastening a covering on a cylinder of a printing machine, the arrangement including a cylinder having at least one axially extending cylinder groove which defines a groove wall at an acute angle to an outer surface of the cylinder, and a covering including at least one flexible support plate having a leading flange and a trailing flange that are inserted into the cylinder groove so that the leading flange engages the groove wall and the trailing flange is adjacent the leading flange. A spindle is arranged in the cylinder groove so as to be rotatable between a release position and a clamping position, and a leaf spring is mounted on the spindle so as to press, in the clamping position of the spindle, the trailing flange and the leading flange against the groove wall.

Abstract: An arrangement for fastening a covering on a cylinder of a printing machine, the arrangement including a cylinder having at least one axially extending cylinder groove which defines a groove wall at an acute angle to an outer surface of the cylinder, and a covering including at least one flexible support plate having a leading flange and a trailing flange that are inserted into the cylinder groove so that the leading flange engages the groove wall and the trailing flange is adjacent the leading flange. A spindle is arranged in the cylinder groove so as to be rotatable between a release position and a clamping position, and a leaf spring is mounted on the spindle so as to press, in the clamping position of the spindle, the trailing flange and the leading flange against the groove wall.

Abstract: An offset printing form comprising at least one printing form made up of at least one driving plate which is of metallic material and cut to size. The printing plate having starting and ending printing edges that are connected with one another so as to form a sleeve. A support for the printing plate is provided in the form of a slightly expandable hollow cylinder. The support is enclosed by an adhesive layer so that the printing plate can be placed on the adhesive layer so as to adhere thereto.

Abstract: An arrangement for fastening a flexible printing plate on a form cylinder of a printing press. The form cylinder having at least one axially directed cavity with a first wall that terminates at an acute angle with an outer surface of the cylinder so as to form an edge on which a leading leg of the printing plate is supportable, and a second wall on which a trailing leg of the printing plate is contactable. A spindle is mounted in the cylinder cavity so as to be swivelable about a longitudinal axis. Additionally, a plurality of first and second plate-like springs are distributed along and fastened to the spindle so that the first springs press the leading plate leg against the first wall of the cavity and the second springs press the trailing plate leg against the second wall of the cavity, and so that swiveling of the spindle disengages the springs from the plate legs.

Abstract: A device for fastening a flexible printing plate (11) on a form cylinder includes a plurality of leaf-shaped springs (5) disposed in a slot (2) of the form cylinder (1). The springs (5) have two legs (6, 7) which rest in the slot (2), one leg (6) being elongated and tensioning the edges (12, 13) of the printing plate (11).

Abstract: In cooperating cylinders, in particular cylinders of a printing mechanism which are in a drive connection via gear wheels and form a feed gap, at least one of the gear wheels is formed by a toothed rim and a wheel body which are connected with one another in a positive engagement via an overload coupling.

Abstract: To permit triggering a torn web capturing roller system (9, 10, 11) or a web deflection unit (28) for rapid capture of a torn or damaged web (7) in a printing machine system having a printing station (2) and thus prevent wrap-around of torn webs about elements of the printing station, the web is guided about a cooling roller or cylinder (14) downstream of a web dryer and strain between and cooling roller and the side wall of the printing machine is measured. This strain is measured for example, by a piezoelectric tranducer or a strain gauge (23) coupled to a bearing (21) in a side wall (19) in the printing machine. The signal from the transducer (18), for example the strain gauge (23), is evaluated in a computer and control unit (26), for example with respect to a reference.

Abstract: To provide for circumferential support of a stretching spindle (8) having axially extending holding or stretching grooves (9, 10) to retain an end portion (14, 17) of a printing plate and clamp the other end portion (16) against the wall of an axially extending clamping groove, a resilient support element (11) is secured to the spindle, to bear against an inner wall of the clamping groove. Preferably, the support element is a resilient or springy element, secured to the spindle by a screw (12). The arrangement permits selective rotation of the form cylinder (1) in either direction, upon suitable placement of the printing plate thereover, with no change of parts or disassembly or reassembly being necessary, by merely rotating the spindle (8) in appropriate direction with respect to the direction of rotation of the form cylinder.

Abstract: To clamp a printing form (16), the end portions are inserted into a clamping groove (2, 3) which is formed by a channel (2) extending at an angle into the printing cylinder, and axially thereover. The channel 2 is enlarged interiorly of the plate cylinder 1 into an essentially cylindrical opening (3), for example a cylindrical bore, within which an eccentrically located spindle (4, 24) is located. Upon rotation of the spindle, it will engage the end portions of the printing plate and press it against a wall (5) which, preferably, is part cylindrical and a continuation of the circle of the spindle diameter (6, 26). The surface of the spindle may be roughened or knurled, and a support element (15, 30), resiliently retained in a radial bore, or formed as a projecting essentially cylindrical collar, engages the inner wall of the axially extending cylindrical opening or bore (3) to prevent bend-through of the spindle upon engaging the ends of a printing plate.