| 摘要 |
. To permit continuous adjustment of a groove cover element (15), the groove cover element is extended in the groove, formed with a through-bore (14) in which an eccentric cam (7) is located, which can be rotated by a spindle. By rotating the spindle, the cover element is raised from the groove, or lowered against a rubber blanket, printing plate or the like thereon. The spindle can be locked in rotated position by a counter nut (Fig. 1) or can be free to rock continuously during rotation of the cylinder by linking the spindle to an arm which rides on a fixed cam. The cam can be adjusted so that the position of the spindle, and hence of the groove cover element, will be flush with the cylinder just at the time when the cylinder rolls off against an adjacent cylinder (100). Adjustment of the cam can be manual, for example via a worm gear drive, or electrically, for example by a stepping motor, so that automatic speed-dependent positional adjustment of the cam is possible. |
