Printing press for security printing and method for changing a printing forme and printing press start-up

摘要

A printing press for security printing has an Orloff offset printing unit comprising a plurality of stencil cylinders which can be inked, in each case, by an associated inking unit, an ink-collecting cylinder which interacts with the plurality of stencil cylinders, an Orloff plate cylinder which interacts with the ink-collecting cylinder, a transfer cylinder which interacts with the Orloff plate cylinder, and an impression cylinder which forms a printing point with the transfer cylinder. At least the transfer cylinder which interacts with the Orloff plate cylinder in the thrown-on position is included by a first printing unit section and is mounted in or on a first part frame. The ink-collecting cylinder is included by a second printing unit section and is mounted in or on a second part frame which is different from the first part frame. The first and the second part frame can be moved optionally into a first relative position with respect to one another, which forms a working position, and into a second relative position with respect to one another which forms a maintenance position. In the maintenance position, a space is formed between the first and the second printing unit section and/or between the first and the second part frame, which space ensures direct access at least to the ink-collecting cylinder, to the Orloff plate cylinder and to the transfer cylinder which interacts with the Orloff plate cylinder. Moreover, the invention relates to a method for changing a printing forme and for starting production.

主权项

1. A printing press for securities printing with an Orlof offset printing unit (26), comprising a plurality of stencil cylinders (24) that are each inkable by an associated inking unit (31), an ink collecting cylinder (23) interacting with the plurality of the stencil cylinders (24), an Orlof plate cylinder (22) interacting with the ink collecting cylinder (23), a transfer cylinder (21) interacting with the Orlof plate cylinder (22), and an impression cylinder (19) forming a printing position (11; 12; 13) together with the transfer cylinder (21), characterised in that,
at least the transfer cylinder (21) that interacts in print-on position with the Orlof plate cylinder (22) is contained in a first printing unit section and is mounted in or on a first sectional frame (47.1), the ink collecting cylinder (23) is contained in a second printing unit section and is mounted in or on a second sectional frame (47.2) that is different from the first sectional frame (47.1), the first and the second sectional frame (47.1; 47.2) can be selectively brought into a first relative position forming a working position and into a second relative position forming a maintenance position with respect to each other, in that the first sectional frame (47.1), the second sectional frame (47.2) or both sectional frames (47.1; 47.2) are arranged as movable within the printing press, wherein in the maintenance position a space (05) is formed between the first and the second printing unit section and/or between the first and the second sectional frame (47.1; 47. 2) that allows direct access to at least the ink collecting cylinder (23), to the Orlof plate cylinder (22) and to the transfer cylinder (21) which interacts with the Orlof plate cylinder (22).