公开(公告)号：US20100313779A1

公开(公告)日：2010-12-16

申请号：US12677456

申请日：2008-09-08

Applicant: Keith Scarfe

Inventor： Keith Scarfe

IPC: B41L47/14

CPC classification number: B41F27/1212 ,  B41P2227/30

Abstract: Apparatus for detecting the presence of a partially loaded printing plate in individual printing plate mounting positions on a plate cylinder of a printing press is disclosed. The system includes a discrete vacuum circuit associated with each individual printing plate mounting position. Each vacuum circuit includes suction elements that are positionable spaced from the surface of a plate cylinder so that, when a leading edge of a printing plate has been received in a lock-up slot in a plate cylinder and the plate cylinder is rotated to partially wrap said printing plate around said plate cylinder, a trailing edge portion of a printing plate is deflected away from the surface of the plate cylinder, due to its resilience, against the suction elements. It is thereby possible to generate a negative pressure in the vacuum circuit closed by said trailing edge portion of the printing plate against the suction elements. The existence of a negative pressure can be used to indicate the presence or absence of a partially loaded printing plate in each of the printing plate mounting positions.

Abstract translation: 公开了一种用于在印刷机的印版滚筒上的各个印版安装位置检测部分装载的印版的存在的装置。 该系统包括与每个单独的印版安装位置相关联的离散真空电路。 每个真空回路包括可从印版滚筒表面定位的抽吸元件，使得当印版的前缘已被接收在印版滚筒的锁定槽中并且印版滚筒旋转以部分包裹时 所述印版围绕所述印版滚筒，印版的后缘部分由于其弹性而偏离印版滚筒的表面，抵靠着抽吸元件。 因此，可以在由印刷版的所述后缘部分关闭的真空回路中产生负压以抵靠吸引元件。 可以使用负压的存在来表示在每个印版安装位置中是否存在部分装载的印版。