Impression roll support and control means

Claim 1

IN A PRINTING PRESS, A SUPPORT, A PRINTING CYLINDER JOURNALED ON SAID SUPPORT, AN IMPRESSION ROLL ENGAGEABLE WITH SAID CYLINDER TO PRESS A WEB TO BE PRINTED THEREAGAINST, A MEMBER MOVABLY MOUNTED ON SAID SUPPORT AND CARRYING SAID IMPRESSION ROLL, POSITIVE STOP MEANS ON SAID SUPPORT AND ENGAGEABLE WITH SAID MEMBER TO LIMIT MOVEMENT OF SAID IMPRESSION ROLL TOWARD SAID CYLINDER, DOUBLE ACTING FLUID PRESSURE OPERATED MEANS CONNECTED BETWEEN SAID MEMBER AND SAID SUPPORT FOR MOVING SAID MEMBER INTO ENGAGEMENT WITH SAID STOP MEANS AND SAID IMPRESSION ROLL INTO OPERATIVE RELATION WITH SAID CYLINDER AND ALSO FOR MOVING SAID MEMBER FROM SAID STOP MEANS AND SAID IMPRESSION ROLL FROM SAID CYLINDER A DISTANCE SUFFICIENT TO PROVIDE ACCESS TO SAID CYLINDER, AND SPRING MEANS BETWEEN SAID STOP MEANS AND SAID MEMBER FOR URGING SAID MEMBER TO MOVE SAID IMPRESSION ROLL A LIMITED DISTANCE FROM SAID CYLINDER IMMEDIATELY UPON RELEASE OF PRESSURE IN SAID FLUID PRESSURE OPERATED MEANS, WHEREBY OUTOF-REGISTRY MOVEMENT OF SAID IMPRESSION ROLL IS REDUCED TO A MINIMUM EXCEPT WHEN WORK ON SAID CYLINDER IS REQUIRED.