Apparatus for perforating thermoplastic film

Claim 1

AN APPARATUS FOR PERFORATING THERMOPLASTIC FILM, SAID APPARATUS COMPRISING: A FIRST ROLL MOUNTED FOR ROTATION ABOUT A LONGITUDINAL AXIS; A PLURALITY OF CIRCUMFERENTIALLY SPACED ROWS OF LONGITUDINALLY ALIGNED AND LONGITUDINALLY SPACED FILM PERFORATING PINS, SAID PINS PROJECTING RADIALLY FROM THE PERIPHERY OF SAID FIRST ROLL; MEANS FOR HEATING SAID PINS; A SECOND ROLL SPACED FROM SAID FIRST ROLL AND MOUNTED FOR ROTATION ABOUT A LONGITUDINAL AXIS PARALLEL TO THE LONGITUDINAL AXIS OF SAID FIRST ROLL; A PLURALITY OF CIRCUMFERENTIALLY SPACED, LONGITUDINALLY EXTENDING, AND RESILIENT RIDGES FORMED ON THE OUTER PERIPHERY OF SAID SECOND ROLL; A PLURALITY OF CIRCUMFERENTIALLY SPACED AND LONGITUDINALLY EXTENDING GROOVES ON THE OUTER PERIPHERY OF SAID SECOND ROLL INTERSPERSED WITH SAID RIDGES, SAID GROOVES OF SAID SECOND ROLL BEING INDIVIDUALLY ADAPTED TO RECEIVED THE OUTER ENDS OF A ROW OF PINS CARRIED BY SAID FIRST ROLL; AND MENS FOR GUIDING FILM BETWEEN SAID FIRST AND SAID SECOND ROLL WITH SAID FILM BEING IN SURFACE CONTACT WITH RIDGES OF SAID SECOND ROLL, SAID RIDGES BEING ADAPTED TO SO CONTACT SAID FILM WITH SAID FILM BEING SPACED FROM SAID PERIPHERY OF SAID FIRST ROLL. SAID RIDGES AND GROOVES ALTERNATING AROUND THE CIRCUMFERENCE OF SAID SECOND ROLL SUCH THAT WITH SOME OF SAID RIDGES IN CONTACT WITH SAID FILM, OTHERS OF SAID RIDGES WILL BE APPROACHING SAID FILM AND STILL OTHERS WILL BE MOVING AWAY FROM SAID FILM DURING ROTATION OF SAID SECOND ROLL.

Claim 2

AN APPARATUS FOR PERFORATING THERMOPLASTIC FILM, SAID APPARATUS COMPRISING: A FIRST ROLL MOUNTED FOR ROTATION ABOUT A LONGITUDINAL AXIS; A PLURALITY OF CIRCUMFERENTIALLY SPACED ROWS OF LONGITUDINALLY ALIGNED AND LONGITUDINALLY SPACED FILM PERFORATING PINS, SAID PINS PROJECTING RADIALLY FROM THE PERIPHERY OF SAID FIRST ROLL; MEANS FOR HEATING SAID PINS; A SECOND ROLL SPACED FROM SAID FIRST ROLL AND MOUNTED FOR ROTATION ABOUT A LONGITUDINAL AXIS PARALLEL TO THE LONGITUDINAL AXIS OF SAID FIRST ROLL; A PLURALITY OF CIRCUMFERENTIALLY SPACED, LONGITUDINALLY EXTENDING, AND RESILIENT RIDGES FORMED ON THE OUTER PERIPHERY OF SAID SECOND ROLL; A PLURALITY OF CIRCUMFERENTIALLY SPACED AND LONGITUDINALLY EXTENDING GROOVES ON THE OUTER PERIPHERY OF SAID SECOND ROLL INTERSPERSED WITH SAID RIDGES, SAID GROOVES OF SAID SECOND ROLL BEING INDIVIDUALLY ADAPTED TO RECEIVED THE OUTER ENDS OF A ROW OF PINS CARRIED BY SAID FIRST ROLL; AND MENS FOR GUIDING FILM BETWEEN SAID FIRST AND SAID SECOND ROLL WITH SAID FILM BEING IN SURFACE CONTACT WITH RIDGES OF SAID SECOND ROLL, SAID RIDGES BEING ADAPTED TO SO CONTACT SAID FILM WITH SAID FILM BEING SPACED FROM SAID PERIPHERY OF SAID FIRST ROLL. SAID RIDGES AND GROOVES ALTERNATING AROUND THE CIRCUMFERENCE OF SAID SECOND ROLL SUCH THAT WITH SOME OF SAID RIDGES IN CONTACT WITH SAID FILM, OTHERS OF SAID RIDGES WILL BE APPROACHING SAID FILM AND STILL OTHERS WILL BE MOVING AWAY FROM SAID FILM DURING ROTATION OF SAID SECOND ROLL.