| 摘要 |
To provide for versatile printing, while permitting exchange of the plate of a blanket cylinder - plate cylinder couple during operation of the printing machine, i.e. while the machine is printing, for example only prime or verso printing in a single color, two blanket cylinder - plate cylinder (2, 4; 3, 5) are provided, selectively engageable with an impression cylinder (1). One (3) of the blanket cylinders is positionable in three axial positions, selectively (a) for engagement with the impression cylinder (1), (b) for engagement with the other blanket cylinder (2) or (c) removed from both the impression and the blanket cylinder, to permit exchange of the plate of the associated plate cylinder (5). A paper web substrate (6) can be passed, selectively, between the two blanket cylinders and partially about the impression cylinder, or between the impression cylinder and one of the blanket cylinders.
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