Spring tensioned wrap-around plate cylinder clamping arrangement

Claim 1

A WRAP-AROUND PLATE CYLINDER CLAMPING MECHANISM IN COMBINATION WITH A CYLINDER AND AT LEAST ONE PRINTING PLATE THEREON HAVING CRIMPED LEADING AND TRAILING EDGES, A LONGITUDINAL CYLINDER SURFACE SLOT HAVING LEADING AND TRAILING SIDE PORTIONS FOR RECEIVING SAID LEADING AND TRAILING EDGES, GROUPS OF LEADING AND TRAILING EDGE PLATE CLAMP UNITS SPACED AND PIVOTALLY MOUNTED ALONG SAID SLOT, EACH UNIT COMPRISING A SWINGABLE LEADING EDGE PLATE ALIGNING CLAMP AND A SWINGABLE PAIR OF FIRST AND SECOND CIRCUMFERENTIALLY OPPOSED TRAILING EDGE CLAMPS, JAWS ON EACH OF SAID CLAMPS FOR ENGAGING THE RESPECTIVE PLATE EDGES, MEANS FOR ACTUATING EACH CLAMP UNIT TOWARD AND FROM PLATE EDGE ENGAGING POSITION AND OTHER MEANS FOR BIASING PARTS OF SAID UNIT TOWARD PLATE CLAMPING AND TENSIONING POSITIONS, SAID OTHER MEANS COMPRISING SETS OF OPPOSED SPRINGS OF DIFFERENT STRENGTHS, SAID SPRINGS OF GREATER STRENGTH BEING MOUNTED BETWEEN THE SAID TRAILING SIDE PORTION OF THE CYLINDER SLOT AND THE SAID FIRST TRAILING EDGE CLAMP AND IN CONTACT THEREWITH, AND THE SPRINGS OF LESSER STRENGTH BEING MOUNTED BETWEEN AND IN CONTACT WITH THE SAID SECOND TRAILING EDGE PLATE CLAMP AND THE LEADING EDGE CLAMP FOR NORMALLY URGING THE LEADING EDGE CLAMP INTO THE LEADING EDGE ENGAGEMENT AND THE TRAILING EDGE JAW OF SAID SECOND TRAILING EDGE CLAMP TOWARD THE OTHER TRAILING EDGE JAW OF SAID FIRST TRAILING EDGE CLAMP FOR ENGAGING A PLATE TRAILING EDGE AND TENSIONING THE PLATE TO CYLINDER.