{HEAD ~ A cutting head} for cutting spread sheet material and using {TAIL ~ a vertically reciprocating knife} achieves a light weight, low cost, low maintenance and high stroking speed design through a unique combination and arrangement of parts wherein the knife drive motor is isolated from rotation with the knife about the theta axis without using a conventional swivel mechanism 
using
{ HEAD ~ A cutting head } for cutting spread sheet material and using { TAIL ~ a vertically reciprocating knife } achieves a light weight , low cost , low maintenance and high stroking speed design through a unique combination and arrangement of parts wherein the knife drive motor is isolated from rotation with the knife about the theta axis without using a conventional swivel mechanism
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