Granulating apparatus for plastic sheet material

Claim 1

APPARATUS FOR CUTTING A STRIP OF SHEET MATERIAL INTO SEPARATE PARTICLES OF A SIZE SMALLER THAN THE STRIP, COMPRISING A STATIONARY BED KNIFE HAVING RECTANGULAR TEETH AND INDIVIDUAL RECTANGULAR RECESSES BETWEEN THE TEETH, A ROTATABLE KNIFE SUPPORT ARRANGED AXIALLY PARALLEL TO SAID BED KNIFE, STRAIGHT KNIVES SUPPORTED BY SAID KNIFE SUPPORT IN AXIALLY AND ANGULARLY SPACED RELATION FOR COOPERATING EACH WITH THE TOP OF AT LEAST TWO TEETH OF SAID STATIONARY BED KNIFE AND HAVING A WIDTH SUBSTANTIALLY SMALLER THAN THE WIDTH OF SAID STATIONARY BED KNIFE, PROFILED KNIVES SUPPORTED BY SAID KNIFE SUPPORT IN AXIALLY AND ANGULARLY SPACED RELATION FOR COOPERATING EACH WITH ONE OF SAID RECESSES BETWEEN SAID TEETH OF SAID STATIONARY BED KNIFE, A PLURALITY OF STRAIGHT GROOVES ARRANGED ON THE SURFACE OF SAID KNIFE SUPPORT AND EXTENDING PERPENDICULARY TO THE AXIS OF ROTATION THEREOF IN AXIALLY AND ANGULARLY SPACED RELATION, A SHAFT ON EACH OF SAID STRAIGHT KNIVES AND SAID PROFILED KNIVES, EACH OF SAID SHAFTS BEING SLIDABLE IN ONE OF SAID GROOVES FOR ADJUSTMENT OF SAID KNIVES PERPENDICULARLY TO THE PLANE CONTAINING THE AXIS OF SAID KNIFE SUPPORT, SAID SHAFTS OF SAID KNIVES FITTIONG WITHIN SAID GROOVES WITHOUT CLEARANCE IN THE DIRECTION OF THE AXIS OF SAID KNIFE SURRPORT, RELEASABLE FIXING MEANS FOR SECURING SAID SHAFTS IN ADJUSTED POSITION ON SAID KNIFE SUPPORT, FEEDING MEANS FOR CONTINUOUSLY FEEDING A STRIP OF SHEET MATERIAL OVER SAID STATIONARY BED KNIFE, AND CONTROL MEANS FOR CONTROLLING SAID FEEDING MEANS IN DEPENDENCE OF THE ROTATION OF SAID KNIFE SUPPORT TO ADVANCE SAID STRIP A DISTANCE LESS THAN THE LENGTH OF SAID TEETH OF SAID BED KNIFE DURING THE TIME INTERVAL THAT TWO EQUIVALENT KNIVES OF SAID KNIFE SUPPORT COOPERATE WITH THE SAME POINT ON SAID STATIONARY BED KNIFE.