Guillotines for shearing plate materials

Claim 1

IN A SHEARING APPARATUS, IN COMBINATION, SUPPORT MEANS; A FIRST SHEAR BLADE HAVING A CUTTING EDGE AND BEING FIXEDLY MOUNTED ON SAID SUPPORT MEANS; A SECOND SHEAR BLADE HAVING A CUTTING EDGE AND BEING MOUNTED ON SAID SUPPORT MEANS MOVABLE BETWEEN AN OPEN POSITION IN WHICH ITS CUTTING EDGE IS SPACED FROM SAID CUTTING EDGE OF SAID FIRST BLADE TO DEFINE AN OPENING BETWEEN SAID CUTTING EDGE SO THAT A BLANK TO BE SHEARED MAY BE FED FROM ONE SIDE THROUGH SAID OPENING WITH A PORTION OF THE BLANK EXTENDIG TO THE OTHER SIDE OF SAID OPENING, AND AN OPERATIVE POSITIO IN WHICH SAID CUTTING EDGE OF SAID SECOND BLADE IS MOVED BEYOND THAT OF SAID FIRST BLADE; STOP MEANS LOCATED AT SAID OTHER SIDE AND ADAPTED TO ENGAGE THE LEADING EDGE OF A BLANK FED THROUGH SAID OPENING TO LIMIT THE FEED OF THE BLANK THROUGH SAID OPEING; MEANS MOUNTING SAID STOP MEANS ON SAID SUPPORT MEANS MOVABLE TOWARD AND AWAY FROM SAID BLADES, SAID MOUNTING MEANS INCLUDING A CROSS BAR EXTENDING SUBSTANTIALLY PARALLEL TO SAID BLADES AND A PAIR OF ELONGATED GUIDE MEANS FIXED SPACED FROM AND SUBSTANTIALLY PARALLEL TO EACH OTHER TO SAID SUPPORT MEANS AND RESPECTIVELY ENGAGED BY OPPOSITE ENDS OF SAID CROSS BAR FOR GUIDING THE LATTER DURING MOVEMENT THEREOF TOWARD AND AWAY FROM SAID BLADES SAID STOP MEANS INCLUDING AT LEAST ONE ARM PIVOTALLY CONNECTED AT ONE END THEREOF TO SAID CROSS BAR FOR TILTING MOVEMENT ABOUT AN AXIS EXTENDING PARALLEL TO THE ELONGATION OF SAID CROSS BAR, SAID ARM HAVING AT THE FREE END THEREOF AN ABUTMENT FACE ADAPTED TO ABUT AGAINST THE LEADING EDGE OF A BLANK FED THROUGH SAID OPENING BETWEEN SAID BLADES, AND MOVING MEANS OPERATIVELY CONNECTED TO SAID MOUNTING MEANS FOR MOVING THE LATTER TOWARD AND AWAY FROM SAID BLADES AND FOR MAINTAINING THE POSITION OF SAID MOUNTING MEANS AND SAID STOP MEANS CARRIED THEREBY AT A SELECTED DISTANCE FROM SAID BLADES.