Apparatus for creasing and/or cutting cardboard and analogous flexible sheet material

Claim 1

ROTARY APPARATUS FOR CREASING AND/OR CUTTING CARDBOARD AND ANALOGOUS FLEXIBLE SHEET MATERIAL INCORPORATING A SOLID ROTATABLE FORME-CARRYING ROLLER, AN IMPRESSION ROLLER, GEARING INTERCONNECTING THE FORME-CARRYING ROLLER AND THE IMPRESSION ROLLER WHEREBY THE SAID ROLLERS MAY BE DRIVEN POSITIVELY SIMULTANEOUSLY, A BACKING OF RELATIVELY THIN FLEXIBLE SHEET MATERIAL BENT TO AN ARCUATE SHAPE FOR FITMENT CONCENTRICALLY ON THE SAID FORME-CARRYING ROLLER, LENGTHS OF RULE ARRANGED TO LIE ON THE BACKING ALONG THE DESIRED LINES OF CREASING AND/OR SEVERANCE, THROUGH-FASTENING MEANS WHICH PASS THROUGH THE BACKING FOR SECURING THE LENGTHS OF RULE TO THE BACKING AND WHICH PROTRUDE ON THE UNDERSIDE OF THE BACKING, MEANS FOR CONFORMING AND SECURING THE BACKING TO THE FORME-CARRYING ROLLER AND A MAT OF RESILIENT MATERIAL FOR INTERPOSITION BETWEEN THE BACKING AND THE FORME-CARRYING ROLLER TO CUSHION THE BACKING AND THE RULE THEREON WITH RESPECT TO THE FORME-CARRYING ROLLER AND TO ENCLOSE THE AFORESAID PROTUBERANCES OF THE THROUGH-FASTENING MEANS WHEREBY THE SAID MAT NOT ONLY CUSHIONS THE LENGTHS OF RULE FROM THE SHOCKS OCASIONED BY CREASING OR CUTTING BUT ALSO PREVENTS ADDITIONAL SHOCKS DUE TO METAL TO METAL CONTACT OF THE SAID PROTUBERANCES AND THE PERIPHERY OF THE FORME-CARRYING ROLLER, SAID MAT ALSO COMPENSATING FOR THE LACK OF RIGIDITY OF THE FORME BY REASON OF THE FORME BEING MADE OF FLEXIBLE RELATIVELY THIN SHEET METAL.