Material cutting device

Claim 1

IN A MATERIAL CUTTING DEVICE COMPRISES OF: (A) CHANNEL MEANS COMPRISED OF A PAIR OF LONGITUDINAL PORTIONS ARRANGED IN SPACED RELATIONSHIP TO PROVIDE A NARROW LONGITUDINAL SLOT THEREBETWEEN; (B) A VERTICAL PLATE OF A THICKNESS SUBSTANTIALLY EQUAL TO THE WIDTH OF SAID SLOT AND A HEIGHT SUBSTANTIALLY GREATER THAN THE DEPTH OF SAID SLOT HAVING TWO INCLINED DOWNWARDLY INWARDLY CONVERGING CUTTING EDGES EXTENDING DOWNWARDLY INTO THE SLOT AND CONVERGING AT A PORTION THAT EMEGES FROM THE UNDERSIDE OF SAID CHANNEL MEANS WHEREBY SAID PLATE SLIDES ALIGNABLY IN SAID SLOT, EXTENDS LONGITUDINALLY FOR A PREDETERMINED DISTANCE ALONG SAID SLOT AND HAS UPPER AND LOWER PORTIONS EXTENDING BOTH ABOVE AND BELOW THE SAID CHANNEL MEANS; (C) OPPOSITELY EXTENDING LOWER SURFACE ANTI-FRICTION MEANS NORMALLY ATTACHED TO THE TWO SURFACES OF SAID VERTICAL PLATE AT A PORTION EMERGING FROM THE UNDERSIDE OF THE CHANNEL MEANS WHEREBY SAID ANTIFRICTION MEANS COME INTO CONTACT WITH THE SURFACE AREA ADJACENT TO THE SLOT AND THE UNDERSIDE OF SAID CHANNEL MEANS;