Method for avoiding paper stretching in offset printing

Claim 1

FOR AN OFFSET PRINTING PRESS INCLUDING IN PARALLEL RELATION A PLATE ROLLER HAVING AN IMAGE THEREON, A RUBBERBLANKETED ROLLER ROTATABLE IN CONTACT WITH THE PLATE ROLLER FOR RECEIVING AN IMPRESSION FROM THE IMAGE OF THE LATTER ROLLER, AN IMPRESSION ROLLER ROTATABLE RELATIVE TO THE BLANKETED ROLLER, AND MEANS FOR ADJUSTING THE BLANKETED ROLLER RELATIVE TO THE IMPRESSION ROLLER SO AS TO ENABLE TO BLANKETED AND IMPRESSION ROLLERS TO EXERT A SQUEEZE PRESSURE UPON A SHEET OF PAPER PULLED BETWEEN THEM IN ORDER TO PRODUCE UPON THE PULLED SHEET AN IMPRESSION RECEIVED BY THE BLANKETED ROLLER FROM THE PLATE ROLLER; A METHOD FOR PREVENTING SAID SQUEEZE PRESSURE FROM STRETCHING THE PULLED SHEET, COMPRISING WRAPPING A FIRST SHEET OF OILED TYMPAN PAPER ABOUT THE SURFACE OF THE IMPRESSION ROLLER; CUTTING FROM A SECOND SHEET OF OILED TYMPAN PAPER A SECTION CONFORMING IN AREA TO AN IMPRESSION TAKEN FROM THE BLANKET ROLLER; PASTING THE CUT OUT SECTION UPON THE FIRST SHEET OF TYMPAN PAPER EXACTLY IN THE LOCATION WHERE AN IMPRESSION WOULD APPEAR IF AN IMPRESSION WERE TAKEN ON THE FIRST SHEET FROM THE BLANKETED ROLLER; WRAPPING A THIRD SHEET OF OILED TYMPAN PAPER OVER AND COEXTENSIVELY WITH THE FIRST SHEET OF TYMPAN PAPER SO AS TO OVERLIE THE CUT OUT SECTION PASTED ON THE LATTER; AND ADJUSTING THE BLANKETED ROLLER RELATIVE TO THE IMPRESSION ROLLER SO AS TO OBTAIN A SQUEEZE PRESSURE BETWEEN THE TWO ROLLERS UPON A SHEET PULLED BETWEEN THEM ONLY OVER THE AREA OF THE PASTED SECTION.