Abstract: The invention relates to a method and an apparatus for positionally accurate processing of a material web in a web-processing process for the series production of products, in particular for producing membrane assemblies, wherein a shaped element (2) is introduced into the material web (1) or a shaped element (2) is applied to the material web (1), wherein multiple reference marks (3) per product are created when the shaped element (2) is being introduced into or when the shaped element (2) is being applied to the material web, and, in a subsequent process step for positionally accurate processing of the material web (1) relative to the shaped element (2) of a product, the position of at least one of the multiple reference marks (3) of this product and/or at least one of the multiple reference marks (3) of a following and/or a preceding product is detected.

Abstract: The invention relates to a device and to a method for transferring a functional layer, in particular a catalyst-coated membrane (2) and/or a gas diffusion layer for a membrane electrode assembly, onto a first material web, wherein: precuts (20) of a functional layer are transferred onto a moving counter surface with a first spacing (x1); the precuts (20) are supplied by means of a second material web (3) with a second spacing; the first spacing (x1) is greater than the second spacing (x2); the second material web (5), at least in a handover portion for carrying over a precut (20) moves synchronously with a conveying speed of the counter surface and is braked relative to the conveying speed to change the spacing; and the dispensing edge (6) in the first transport direction (1) relative to the second material web (5) is adjusted in order to create a braking and acceleration section for the precuts (20) moving discontinuously with the second material web (5).

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 unit of a web-fed rotary press has a plurality of press units, each press unit having a form cylinder, a transfer cylinder, an inking unit and optionally a damping unit, and having at least one impression cylinder. Each form cylinder rolls on the respective transfer cylinder and each transfer cylinder rolling on an impression cylinder in a thrown-on position of the printing unit, in order to apply single-color printed images onto a printing material which is moved through between the transfer cylinders and the or each impression cylinder. Each form cylinder bears a plurality of printing images next to one another in the axial direction, by which corresponding single-color printed images are applied to the printing material.

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 web-fed press includes at least two printing units and at least one drier for drying at least one printing-material web which is moved through the at least two printing units and printed on at least one side with at least one offset printing ink at each of the printing units. The printing-material web is dried at least after the first printing unit and before the second printing unit.

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 web fed rotary printing unit is provided. The printing unit includes a plurality of cylinders including a first cylinder assigned a first adjustable drive motor and a second cylinder assigned a second adjustable drive motor. The first and second cylinders are in a mechanical drive connection that can be moved between engaged and disengaged positions. When the mechanical drive connection is engaged, the first drive motor assigned to the first cylinder forms a master drive in dependence on which the second drive motor assigned to the second cylinder can be controlled in the manner of a slave drive.

Abstract: A method for handling printing plates, namely for arranging printing plates in cassettes that are used as printing plate repositories during a printing plate change, is disclosed. Each printing plate is assigned a coding before, during or after imaging relating to a plate cylinder position of a printing couple at which the respective printing plate is used. Each imaged and coded printing plate is transported to the region of a cassette. In the region of each cassette, the coding of the printing plates is read out, and in doing so a check is made to see whether the printing plates are located at the correct cassette. If it is established that the printing plates are located at the correct cassette, a defined accommodation position in the cassette is released for each printing plate and the printing plate is positioned at this accommodation position within the cassette.

Abstract: A method for operating an inking system of a printing press, where the inking system has an ink fountain in which printing ink is kept in readiness, where the inking system has a doctor roller which holds printing ink kept in readiness in the ink fountain, where the inking system has ink sliders or ink blades which adjust the amount of ink to be transferred per ink zone from the ink fountain to the doctor roller, and where the inking system has a film roller which transfers printing ink from the doctor roller to at least one inking system roller downstream from the film roller. At least one ink slider or ink blade is controlled in such a way that the amount of ink transferred zonally to the doctor roller varies over the circumference of the doctor roller.

Abstract: An apparatus and method for changing a printing plate of a printing unit of a printing press is disclosed. A printing unit of a printing press, in particular a web-fed printing press, has at least one printing couple, where the, or each, printing couple includes a plate cylinder, a transfer cylinder, an inking system as well as, preferably, a dampening system. Each printing couple is allocated a printing plate changing device for executing a partially automatic or fully automatic printing plate change on the plate cylinder of the respective printing couple. The plate cylinder of each printing couple can be displaced between two positions in such a way that in a first position the plate cylinder is engaged on the inking system and disengaged from the printing plate changing device and in a second position is engaged on the printing plate changing device and disengaged from the inking system.

Abstract: A printing plate for a printing machine, more preferably for a reel-fed rotary printing machine, is disclosed. The plate has a plate-like main body serving as a subject carrier, with a leading end which is angled-off relative to the main body, and with a trailing end which is angled-off relative to the main body where the printing plate can be mounted or placed on a form cylinder of a printing machine via the leading end and the trailing end, and where the leading end and the trailing end are symmetrically angled-off relative to the main body such that the leading end and the trailing end enclose an approximately identical angle with one side of the main body. The leading end and the trailing end each enclose an angle between 85° and 90° with the side of the main body.

Abstract: An apparatus and method for driving a driven unit of a printing press, specifically a printing couple or a folding unit of a rotary web press, is disclosed. A cylinder or roller to be driven is driven by a drive with an interposed transmission. An input element is mounted on a shaft of the cylinder or the roller to be driven and an output element is assigned to the drive co-acting with the input element. A shaft of the drive is carried in at least two bearing locations. The output element is mounted directly to the shaft of the drive such that the output element is located immediately adjacent a bearing location of the shaft of the drive.

Abstract: An apparatus and method for reducing oscillations in a web-fed rotary press are disclosed. The apparatus includes a form cylinder of a web-fed rotary press, having at least one clamping device for fastening at least one printing plate on the form cylinder. The clamping device has at least one clamping element which is positioned in a clamping channel. As seen in a circumferential direction, the clamping channel of the form cylinder has an effective clamping-channel width of at most 7 mm.

Abstract: A web-fed press includes at least two printing units and at least one drier for drying at least one printing-material web which is moved through the at least two printing units and printed on at least one side with at least one offset printing ink at each of the printing units. The printing-material web is dried at least after the first printing unit and before the second printing unit.

Abstract: A printing unit of a rotary printing press with a transfer cylinder and a form cylinder interacting with the transfer cylinder is disclosed. The body length of the transfer cylinder and the form cylinder corresponds to six horizontal or upright print pages and the transfer cylinder has two channels offset by 180° in the circumferential direction to accommodate printing blankets. Two or three printing blankets are arranged next to one another in the longitudinal direction of the transfer cylinder. With the arrangement of two printing blankets, one printing blanket is twice as wide as the second printing blanket and the printing blankets each are attached in one of the two channels offset by 180°. With the arrangement of three printing blankets, two adjacent printing blankets are attached in a channel and the third printing blanket is attached in the offset channel.

Abstract: A rotating body of a web-fed press, in which one or more hot spots develop in at least one sector of at least one of two or more rotating bodies due to the rolling of the two or more rotating bodies on one another. The rotating body has at least one inhomogeneity in the form of a material recess, so that heat conduction or thermal expansion is interrupted at the site of the material recess.

Abstract: A printing unit of a web-fed rotary press has a plurality of press, each press unit having a forme cylinder, a transfer, an inking unit and optionally a damping unit, and having at least one impression cylinder. Each forme cylinder rolls on the transfer cylinder of the respective press unit and each transfer cylinder rolling on an impression cylinder in a thrown-on position of the printing unit, in order to apply single-color printed images onto a printing material which is moved through between the transfer cylinders and the or each impression cylinder. The forme cylinders and/or the transfer cylinders are positioned asymmetrically.

Abstract: A printing unit of a web-fed rotary press has a plurality of press units, each press unit having a forme cylinder, a transfer cylinder, an inking unit and optionally a damping unit, and having at least one impression cylinder. Each forme cylinder rolls on the respective transfer cylinder and each transfer cylinder rolling on an impression cylinder in a thrown-on position of the printing unit, in order to apply single-color printed images onto a printing material which is moved through between the transfer cylinders and the or each impression cylinder. Each forme cylinder bears a plurality of printing images next to one another in the axial direction, by which corresponding single-color printed images are applied to the printing material.

Abstract: A web fed rotary printing unit is provided. The printing unit includes comprising a plurality of cylinders including a first cylinder assigned a first adjustable drive motor and a second cylinder assigned a second adjustable drive motor. The first and second cylinders are in a mechanical drive connection that can be moved between engaged and disengaged positions. When the mechanical drive connection is engaged, the first drive motor assigned to the first cylinder forms a master drive in dependence on which the second drive motor assigned to the second cylinder can be controlled in the manner of a slave drive.