Method of perforating thermoplastic sheets

Claim 1

A METHOD OF PERFORATING THERMOPLASTIC ADHESIVE TAPE FACED WITH A REMOVABLE HEAT CONDUCTIVE FLEXIBLE SHEET SUBSTANTIALLY UNAFFECTED BY TEMPERATURES SOFTENING BOTH THE ADHESIVE AND THE BACKING OF SAID TAPE, COMPRISING SELECTING A ROTATABLE PATTERN ROLL HAVING A SURFACE CONSISTING OF RAISED CYCLINDRICAL PRESSURE RECEIVING AREAS SURROUNDED BY DEPRESSED AREAS, FIXING THE AXIS OF SAID ROLL SO THAT THE NIP ELEMENTS OF ITS PRESSURE RECEIVING AREAS ARE IN THE SAME PLANE AS THE NIP ELEMENTS OF AN ADJACENT ROTATABLE HOT ROLL, INTRODUCING SAID ADHESIVE TAPE INTO THE NIP BETWEEN SAID ROLLS WITH ITS FACING TOWARDS THE HOT ROLL AND ITS BACKING SEPARATED FROM THE PATTERN ROLL BY AN INTERPOSED FLEXIBLE SHEET OF LOW CONDUCTIVITY, APPLYING FLUID PRESSURE TO A PISTON MOVABLE BETWEEN FLUID PORTS IN A CYLINDER TO CAUSE MOVEMENT OF A PISTON ROD, BALL-JOINTED TO THE MID-PORTION OF A PRESSURE SHAFT, MOVEMENT OF SAID SHAFT CAUSING RESPONSIVE MOVEMENT OF PRESSURE ROCKER ARMS EACH INDIVIDUALLY PIVOTING ABOUT A PIVOT SHAFT CAUSING MOVEMENT IN TURN OF THE ENDS OF THE HOT ROLL SHAFT IN SPHERICAL BALL BEARINGS RESULTING IN MOVEMENT OF THE HOT ROLL TOWARD THE PATTERN ROLL WHEREBY THE HOT ROLL AXIS VARIES FORM PARALLELITY WITH THE AXIS OF THE PATTERN ROLL TO PARALLELITY WITH THE MOST ADJACENT SURFACE OF SAID FACING AND SAID FACED ADHESIVE TAPE AND SAID INTERPOSED SHEET ARE GRIPPED WITH POSITIVE PRESSURE THE LENGTH OF THE NIP BETWEEN THE HOT ROLL AND THE PRESSURE RECEIVING AREAS OF THE PATTERN ROLL, POSITIVELY DRIVING THE PATTERN ROLL, THE TEMPERATURE OF SAID HOT ROLL BEING SUFFICIENT TO SOFTEN SAID ADHESIVE TAPE AND THE PRESSURE OF SAID FLUID BEING SUFFICIENT TO SQUEEZE OUT THE ADHESIVE TAPE ADHESIVE AND BACKING FROM THE AREA BETWEEN SAID HOT ROLL AND SAID PRESSURE RECEIVING AREAS OF SAID PATTERN ROLL DURING PASSAGE OF SAID TAPE THROUGH SAID NIP WHEREBY HOLES ARE PRODUCED CORRESPONDING ROUGHLY TO THE SHAPE AND SIZE OF SAID PRESSURE RECEIVING AREAS OF THE PATTERN ROLL.

Claim 2

A METHOD OF PERFORATING THERMOPLASTIC ADHESIVE TAPE FACED WITH A REMOVABLE HEAT CONDUCTIVE FLEXIBLE SHEET SUBSTANTIALLY UNAFFECTED BY TEMPERATURES SOFTENING BOTH THE ADHESIVE AND THE BACKING OF SAID TAPE, COMPRISING SELECTING A ROTATABLE PATTERN ROLL HAVING A SURFACE CONSISTING OF RAISED CYCLINDRICAL PRESSURE RECEIVING AREAS SURROUNDED BY DEPRESSED AREAS, FIXING THE AXIS OF SAID ROLL SO THAT THE NIP ELEMENTS OF ITS PRESSURE RECEIVING AREAS ARE IN THE SAME PLANE AS THE NIP ELEMENTS OF AN ADJACENT ROTATABLE HOT ROLL, INTRODUCING SAID ADHESIVE TAPE INTO THE NIP BETWEEN SAID ROLLS WITH ITS FACING TOWARDS THE HOT ROLL AND ITS BACKING SEPARATED FROM THE PATTERN ROLL BY AN INTERPOSED FLEXIBLE SHEET OF LOW CONDUCTIVITY, APPLYING FLUID PRESSURE TO A PISTON MOVABLE BETWEEN FLUID PORTS IN A CYLINDER TO CAUSE MOVEMENT OF A PISTON ROD, BALL-JOINTED TO THE MID-PORTION OF A PRESSURE SHAFT, MOVEMENT OF SAID SHAFT CAUSING RESPONSIVE MOVEMENT OF PRESSURE ROCKER ARMS EACH INDIVIDUALLY PIVOTING ABOUT A PIVOT SHAFT CAUSING MOVEMENT IN TURN OF THE ENDS OF THE HOT ROLL SHAFT IN SPHERICAL BALL BEARINGS RESULTING IN MOVEMENT OF THE HOT ROLL TOWARD THE PATTERN ROLL WHEREBY THE HOT ROLL AXIS VARIES FORM PARALLELITY WITH THE AXIS OF THE PATTERN ROLL TO PARALLELITY WITH THE MOST ADJACENT SURFACE OF SAID FACING AND SAID FACED ADHESIVE TAPE AND SAID INTERPOSED SHEET ARE GRIPPED WITH POSITIVE PRESSURE THE LENGTH OF THE NIP BETWEEN THE HOT ROLL AND THE PRESSURE RECEIVING AREAS OF THE PATTERN ROLL, POSITIVELY DRIVING THE PATTERN ROLL, THE TEMPERATURE OF SAID HOT ROLL BEING SUFFICIENT TO SOFTEN SAID ADHESIVE TAPE AND THE PRESSURE OF SAID FLUID BEING SUFFICIENT TO SQUEEZE OUT THE ADHESIVE TAPE ADHESIVE AND BACKING FROM THE AREA BETWEEN SAID HOT ROLL AND SAID PRESSURE RECEIVING AREAS OF SAID PATTERN ROLL DURING PASSAGE OF SAID TAPE THROUGH SAID NIP WHEREBY HOLES ARE PRODUCED CORRESPONDING ROUGHLY TO THE SHAPE AND SIZE OF SAID PRESSURE RECEIVING AREAS OF THE PATTERN ROLL.