Patent ID: 6655278
Filing Date: 2003-12-02
Classification: B41F

Abstract:
An apparatus for fine positional adjustment of a plate cylinder in both lateral and circumferential directions thereof for image registration of a multicolor rotary printing press, the apparatus comprising:(a) a plate cylinder; (b) frame means for supporting the plate cylinder for both lateral and circumferential displacement; (c) lateral adjustment means acting between the plate cylinder and the frame means for positional adjustment of the plate cylinder in a lateral direction thereof relative to the frame means, the lateral adjustment means including a first rotary member to be driven bidirectionally relative to the frame means for the lateral positional adjustment of the plate cylinder; (d) lateral overrun prevention means for limiting the bidirectional rotation of the first rotary member of the lateral adjustment means relative to the frame means in order to prevent the plate cylinder from being driven laterally beyond limits; (e) circumferential adjustment means acting between the plate cylinder and the frame means for positional adjustment of the plate cylinder in a circumferential direction thereof, the circumferential adjustment means including a second rotary member to be driven bidirectionally relative to the frame means for the circumferential positional adjustment of the plate cylinder; and (f) circumferential overrun prevention means for limiting the bidirectional rotation of the second rotary member of the circumferential adjustment means relative to the frame means in order to prevent the plate cylinder from being driven circumferentially beyond limits.