Abstract: A method and apparatus for printing on a printing material web is disclosed. A rotary offset printing machine includes a printing unit with two plate cylinders and a blanket cylinder. The blanket cylinder prints on the printing material web and the two plate cylinders are arranged relative to each other such that respective images from the two plate cylinders are transferred to an identical position on the blanket cylinder during the printing.

Abstract: A printing blanket for fastening on a printing blanket cylinder and a method for the production thereof are disclosed. The printing blanket includes at least one inner carrier layer, a first intermediate layer designed as a woven fabric layer and an outer cover layer. The woven fabric layer includes warp threads and weft threads. The printing blanket can be fastened on a printing blanket cylinder such that the warp threads extend in the axial direction of the printing blanket cylinder and the weft threads extend in the circumferential direction of the printing blanket cylinder.

Abstract: A rubber sleeve for a printing press and a method for producing a rubber sleeve is disclosed. The rubber sleeve has a rigid support sleeve and a blanket that is wrapped around the support sleeve as well as is firmly connected to the support sleeve. The blanket has at least a two-layer structure with an inner layer embodied as a base layer and an outer layer serving as a functional layer for the printing process, where the butting edges of the blanket are connected to one another via a sealing material, which is introduced in a gap embodied between the butting edges. The sealing material is introduced in the gap embodied between the butting edges while forming a channel.

Abstract: A cylinder for an offset printing press comprising a steel core and a heat-conducting layer arranged on the steel core in order to uniformly distribute localized steel core heating. The heat can consist of copper and can be arranged in or underneath a functional layer on the cylinder.

Abstract: A damping unit for a press has means for applying a clamping solution to a printing form and means for setting the quantity of damping solution applied. At least one sensor is provided for registering the quantity of damping solution actually applied to the printing form. By means of a comparison with a predefined quantity of damping solution, the quantity of damping solution on the printing form can be regulated.

Abstract: An ink transfer device which can be clamped on a rubber covered cylinder in a printing press includes a rubber blanket for transferring ink from a printing forme to a printing material, the blanket having a leading end and a trailing end which are separated by a non-ink transferring gap when the device is clamped on the cylinder; a carrier element fixed to the rubber blanket; and a pair of fixing elements for clamping the blanket on the cylinder, the fixing elements being positioned on the carrier adjacent to respective ends of the blanket. In order to minimize the non-ink transferring gap, the fixing elements and the carrier element are formed as separate subassemblies which are joined together.

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 printing press cylinder is disclosed. The cylinder includes a lock-up channel extending in an axial direction of the cylinder, where a clamping piece is accommodated in the lock-up channel to clamp a plate on a surface area of the printing press cylinder. The clamping piece includes first feed slants and second feed slants. Projections of the leading edge of a to-be-clamped plate are co-operable with the first feed slants and projections of the trailing edge of a to-be-clamped plate are co-operable with the second feed slants such that the leading edge of the to-be-clamped plate is clampable in a self-centering manner between the clamping piece and a leading channel wall of the lock-up channel and the trailing edge of the to-be-clamped plate is clampable in a self-centering manner between the clamping piece and a trailing channel wall of the lock-up channel.

Abstract: A rubber sleeve for a printing press and a method for producing a rubber sleeve is disclosed. The rubber sleeve has a rigid support sleeve and a blanket that is wrapped around the support sleeve as well as is firmly connected to the support sleeve. The blanket has at least a two-layer structure with an inner layer embodied as a base layer and an outer layer serving as a functional layer for the printing process, where the butting edges of the blanket are connected to one another via a sealing material, which is introduced in a gap embodied between the butting edges. The sealing material is introduced in the gap embodied between the butting edges while forming a channel.

Abstract: A damping unit for a press has means for applying a damping solution to a printing form and means for setting the quantity of damping solution applied. At least one sensor is provided for registering the quantity of damping solution actually applied to the printing form. By means of a comparison with a predefined quantity of damping solution, the quantity of damping solution on the printing form can be regulated.

Abstract: A rubber sleeve for a printing press includes, an inner layer, which is formed as a base layer, and an outer layer, which is formed as a functional layer and is used to carry out the printing process. The base layer and the functional layer are produced by cylindrical shaping of separate, flat blanks, and arranged so that the abutting edges of the base layer and the abutting edges of the functional layer are circumferentially offset from each other.

Abstract: A cylinder of a printing press is provided with an axial bore in which a fluid supply line is supported by spacers forming a return duct having an annular cross section, so that the inlet and the outlet of the fluid are at the same end of the cylinder.

Abstract: A sleeve for a cylinder, in particular for a transfer cylinder or a blanket cylinder, of a printing press, having a base body which has at least one layer and a replaceable body which has at least one layer. The base body is connected fixedly to a cylinder of a printing press and the replaceable body can be pulled off, or replaced, from the base body, and thus, the cylinder of the printing press without being destroyed, in particular to carry out changeover work.

Abstract: A method for influencing lateral web spreading in a printing unit in a rotary printing press, the printing unit having first and second transfer cylinders contacting each other along a contact zone for receiving a web to be printed on therebetween and undergoing a deflection during operation, and at least one plate cylinder which is respectively settable against one of the first and second transfer cylinders for printing on at least one side of the web receivable in the contact zone.

Abstract: The metal printing blanket includes a supporting layer formed of a metallic material having a relatively high thermal conductivity, and a rubber layer applied to the metallic supporting layer and serving to transfer a print. As an alternative, the metal printing blanket includes a supporting layer formed of a metallic material, a rubber layer serving to transfer a print, and an intermediate layer arranged between the supporting layer and the rubber layer and formed of a metallic material having a relatively high thermal conductivity.

Abstract: A method for influencing lateral web spreading in a printing unit in a rotary printing press, the printing unit having first and second transfer cylinders contacting each other along a contact zone for receiving a web to be printed on therebetween and undergoing a deflection during operation, and at least one plate cylinder which is respectively settable against one of the first and second transfer cylinders for printing on at least one side of the web receivable in the contact zone.

Abstract: A printing unit for influencing lateral web spreading in particular in rotary presses, which makes constant contact conditions possible across the width in the rubber-rubber nip and improves the lateral-register quality and the web run without using concave or convex blanket cylinders, has a blanket cylinder and plate cylinders which can be set against the former for printing on one or both sides of a web. The web passes through between the blanket cylinders in a contact zone, it either being possible to skew at least one of the blanket cylinders with respect to the respective plate cylinder or it being possible to skew at least one of the plate cylinders with respect to the respective blanket cylinder, for producing a concave velocity profile on the web.

Abstract: An ink transfer device which can be clamped on a rubber covered cylinder in a printing press includes a rubber blanket for transferring ink from a printing forme to a printing material, the blanket having a leading end and a trailing end which are separated by a non-ink transferring gap when the device is clamped on the cylinder; a carrier element fixed to the rubber blanket; and a pair of fixing elements for clamping the blanket on the cylinder, the fixing elements being positioned on the carrier adjacent to respective ends of the blanket. In order to minimize the non-ink transferring gap, the fixing elements and the carrier element are formed as separate subassemblies which are joined together.

Abstract: A rubber sleeve for a printing press, having an at least two-layer structure, is disclosed. The rubber sleeve has an inner layer formed as a carrier layer and an outer layer formed as a functional layer and used for the printing process, the carrier layer and the functional layer being a constituent part of a rubber blanket, which is shaped in the manner of a sleeve in order to form the rubber sleeve and is connected to itself in the region of mutually opposite joint faces of the carrier layer and the functional layer. At least the joint faces of the carrier layer being enlarged in such a way that the same absorb circumferential forces acting on the rubber sleeve.

Abstract: A method for positioning a sleeve on a printing-press cylinder includes providing a printing-press cylinder, a sleeve which is to be positioned on the printing-press cylinder, and a polyvinyl alcohol. The polyvinyl alcohol is applied to at least one of an outer surface of the printing-press cylinder and an inner surface of the sleeve. The sleeve is then pushed or pulled onto the printing-press cylinder such that the outer surface of the printing-press cylinder and the inner surface of the sleeve lie confrontingly opposed to one another.