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 press is disclosed. The printing press includes at least one rotating reel changer, which receives the to-be-printed paper web as a roll, and a printing couple, which applies ink and dampening solution via the rotating cylinder rollers to the paper web, as well as a folding unit with rotating folding unit cylinders for assembling the printed paper web into the desired printed products. A transponder is arranged in at least one rotating component of the printing press and a receiver is arranged in a non-moving part of the printing press.

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: To automate the preparation of a replacement paper roll for flying roll changing, initial layer portions of web material from the replacement paper roll and which, typically, are damaged, are rolled on a scrap roll (2) to form scrap material windings thereon. In a first moving step, the scrap roll (2) is placed in engagement with the replacement paper roll to wind scrap material thereon. When a sensing element (22) senses that the paper is suitable for printing, the scrap roll is moved away from the replacement roll (1) and into a preparation or processing position (FIG. 11). At that processing position, two spaced axially extending perforation or tear lines (4, 5) are formed in the beginning portion. In a third moving step, the beginning portion is placed in engagement with the paper roll by moving the scrap roll back towards the replacement roll and, preferably, adhered thereto temporarily by a holding adhesive.

Abstract: To prepare an initial portion (41) on a replacement roll (4) of a substrate web, for example a printing paper web, for flying pasting, the new roll (4) is rotatably supported in apredetermined position. An adhesive application and cutter structure (5) is then placed in operative association with the roll. An initial portion (41) of the web is rolled off from the new roll, positioned on the support plate, and, in one operating step, an end, which may be jagged, is cut off and, inwardly of the cut edge (42), a perforating or tear-off line (43) is formed, to leave, between the cut edge and the tear-off line, a tear-off section (44). The web can then be repositioned on the plate (6) and a connecting adhesive (19) is applied to the upper side of the web, for subsequent flying pasting against a moving expiring web, for example, as well as a holding adhesive, applied in the inside of the tear-off section (44), so that the end portion (41) is securely attached to the roll.

Abstract: The chambered doctor blade unit is intended to ink an anilox roller (10) with ink having a viscosity of at least 1 d Pa s and preferably greater than 40 d Pa s. Each of the side walls (3) when the inker is in operative position with respect to the anilox roller (10) form circumferential gaps (13) with respect to the anilox roller, having a width (A) of between about 0.1 to 3 mm, thereby preventing wear and tear on the side walls and sealing of the receptors or cells of the anilox roller with a braided material. The doctor blades (4, 5) are resiliently pressed against upper (20) and lower edges of the side walls, to prevent formation of undulation, the side walls being formed with recessed surfaces (11) facing the anilox roller, with abraded surfaces terminate in inclined relief surfaces (19) forming an inclined gap, to permit escape of ink adjacent the lateral surfaces.