Cylinder change means for printing machine

Claim 1

IN A PRINTING APPARATUS, A BASE, AN IMPRESSION CYLINDER ROTATABLY MOUNTED FROM SAID BASE, A PLATE CYLINDER, MEANS REMOVABLY AND ROTATABLY MOUNTING SAID PLATE CYLINDER ON SAID BASE IN SPACED RELATIONSHIP TO SAID IMPRESSION CYLINDER, A CARRIER MOVABLY MOUNTED ON SAID BASE, A BLANKET CYLINDER, MEANS REMOVABLY AND ROTATABLY MOUNTING SAID BLANKET CYLINDER ON SAID CARRIER, AND CARRIER BEING MOVABLE IN A SUBSTANTIALLY STRAIGHT LINE AT A PREDETERMINED ANGLE RELATIVE TO SAID IMPRESSION CYLINDER AND SAID PLATE CYLINDER TO CARRY SAID BLANKET CYLINDER INTO AND OUT OF PRINTING RELATIONSHIP TANGENT TO SAID IMPRESSION CYLINDER AND SAID PLATE CYLINDER, SAID PLATE CYLINDER AND SAID BLANKET CYLINDER BEING OF SUBSTANTIALLY THE SAME CORRESPONDING SIZES, SAID PREDETERMINED ANGLE BEING SUCH THAT SAID BLANKET CYLINDER AND SAID PLATE CYLINDER ARE RESPECTIVELY REPLACEABLE BY AT LEAST ONE OTHER SIZE OF CORRESPONDING BLANKET AND PLATE CYLINDERS IN WHICH SAID BLANKET CYLINDER IS ADAPTED TO BE MOVED INTO AND OUT OF PRINTING RELATIONSHIP TANGENT TO SAID IMPRESSION CYLINDER AND SAID PLATE CYLINDER AND WITH THE AXES OF ROTATION OF SAID FIRST MENTIONED PLATE CYLINDER AND THE REPLACEMENT PLATE CYLINDER BEING SUBSTANTIALLY AT THE SAME PLACE.