| 摘要 |
A plate cylinder (16) is mounted in eccentrics (42 and 43) for the purpose of throwing the plate cylinder (16) off from a blanket cylinder (24). One end portion of the plate cylinder (16) is mounted in a skew eccentric (70) for making skew adjustments. A form roll (82) is mounted in rolling contact with the plate cylinder (16), and the center-to-center distance between the form roll (82) and the plate cylinder (16) may be adjusted to achieve a desired contact pressure. A rotatable cam (132) provides means for throwing the form roll (82) off the plate cylinder (16) and returning it into contact with the plate cylinder. The cam surfaces (140 and 142) are sufficiently long that the previously adjusted contact pressure is maintained when the skew eccentric (70) is rotated. The form roll throw off means and the plate cylinder throw off eccentrics (42 and 43) are independently operable so that throwing off the plate cylinder from the blanket cylinder (24) does not effect the form roll contact pressure adjustment, and the form roll (82) can be thrown on or off the plate cylinder (16) whether or not the plate cylinder is thrown on or off the blanket cylinder. |
