Variable cut-off web perfecting press

Abstract

Abstract A WEB FED PERFECTING PRESS FOR PRINTING OFFSET IMAGES OF DIFFERENT SIZE ON THE PRINTED WEB. BOTH THE TOP AND BOTTOM PLATE CYLINDERS ARE JOURNALED IN A PRESS FRAME FOR ROTATION ABOUT FIXED AXES. THE TOP AND BOTTOM BLANKET CYLINDERS ARE JOURNALED IN AUXILIARY FRAMES THAT ARE SUPPORTED BY THE MAIN FRAME. THE AUXILIARY FRAMES ARE ADJUSTABLE HORIZONTALLY ON THE MAIN FRAME TO MOVE THE BLANKET CYLINDERS TOWARD AND AWAY FROM EACH OTHER AND TOWARD AND AWAY FROM THE FIXED PLATE CYLINDERS. BOTH OF THE BLANKET CYLINDERS ARE MOUNTED IN ECCENTRIC BEARINGS FOR VERTICAL ADJUSTMENT WITHIN THE AUXILIARY FRAMES SO THAT THE BLANKET CYLINDERS ARE ALSO ADJUSTABLE VERTICALLY RELATIVE TO EACH OTHER. THE PLATE AND BLANKET CYLINDERS ARE ARRANGED TO HAVE ANNULAR PLATES OF DIFFERENT CIRCUMFERENCES MOUNTED THEREON WITH DIFFERENT SIZED ANNULAR FILLER SHIMS BETWEEN THE CYLINDERS AND THE PLATES. THE VARIOUS SIZED PLATES AND FILLER SHIMS PROVIDE DIFFERENT LENGTHS FOR THE PRINTED OFFSET IMAGES ON THE PRINTED WEB. THE DRIVE GEARING AND BEARERS FOR THE PAIRS OF PLATE AND BLANKET CYLINDERS INCLUDE IDLER GEARS AND IDLER BEARERS SUITABLY MOUNTED TO DRIVE THE PLATE AND BLANKET CYLINDERS OF DIFFERENT DIAMETERS. TO CHANGE THE DIAMETER OF THE PLATE AND BLANKET CYLINDERS, THE ANNULAR PLATES AND ANNULAR SHIMS ARE REMOVED FROM THE CYLINDERS AND OTHER PREFERABLY PREREGISTERED PLATES AND ANNULAR SHIMS ARE POSITIONED ON THE CYLINDERS WITHIN THE PRESS TO CHANGE THE CIRCUMFERENTIAL DIMENSION OF THE PLATE AND BLANKET CYLINDERS. THE AUXILIARY FRAMES ARE ADJUSTED HORIZONTALLY AND THE BLANKET CYLINERS ARE ADJUSTED VERTICALLY TO MOVE THE PERIPHERY OF THE BLANKET CYLINDERS INTO ABUTTING RELATION WITH THE PLATE CYLINDERS AND INTO ABUTTING RELATION WITH EACH OTHER FOR PERFECTING PRINTING ON BOTH SIDES OF THE WEB.

Inventors

• 👤 Harry E Mowry

Bibliographic Details