| 摘要 |
A cutting head for cutting spread sheet material and using 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. The knife has a leaf spring portion directly connected to the eccentric member, fatigue failure of the leaf spring portion of the blade is inhibited by antivibration stops and by a varying cross-section, a simple sharpener mechanism sharpens the blade on either one or both side faces, and a roller guide restrains the lower portion of the blade to the vertical axis with minimum frictional loss.
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