| 摘要 |
<p>Appts. for testing the sharpness of cutting blades, esp. razor blades, by mounting the blade in a streamlined clamp and passing the blade between two flexible tapes linked by strands normal to the planes of the tapes and the edge of the clamped blades. The pattern of the strands is designed to impinge successively at various positions across the width of the blade edge. The resistance of the strands to the blade is monitored as a measure of the sharpness and uniformity of the blade edge. Pref. the strands are polyamide filaments of 50-100, pref. 60-80 mu m dia. Pref. the clamp is coated with a low friction material such as PTFE.</p> |
