| 摘要 |
The positioning device of a flexible printing plate on a plate cylinder (3) allows to bias a printing plate in a rotary printing machine, the plate cylinder (3), having a rotational axis (2), comprises a groove (1) being disposed in a parallel direction with the rotational axis (2) and inside of which said positioning device of the printing plate is arranged. This device is actuated by the lateral movement of the plate cylinder (3) which is set into operation by an external means and by a cam-ring (14) being arranged outside the cylinder facing this means. This means, which is secured to the frame of the printing machine, consists of the motor and the mechanism allowing the conventional lateral movement of the plate cylinder (3) along its rotational axis (2). On the inner edges (12, 13) of the cam-ring (14) rests, by means of a screw (62) and a fastener (60), a roller secured to a movable base plate which is freely held with respect to the plate cylinder (3) by holding means (102). Two cams (17), being rigidly attached on the bottom of the groove (1) of the plate cylinder (3), control the movement of two rollers (15), which are attached to the base plate (4), in an opposed slanted movement.
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