| 摘要 |
<p>A rotary web shearing machine equipped with pairs of rotating helical blades, the improvement for adjusting the clearance between the blades which makes it unnecessary to adjust the blades by their individual holders while the machine is stationary, but makes it possible to effect this adjustment without shutting down the machine. This is accomplished either by providing that one of the blades remains in a fixed axial position, while the companion cutting blade holding shaft is moved axially with respect to the fixed blade. This is accomplished by the novel mechanism on the end of the shaft of said blade mounted in a special bearing and housing and equipped with an adjusting screw and nut which permits imparting of axial motion to the shaft while it is in rotation if desired and thus effecting a variation in the clearance between the pair of helical blades eliminating the necessity of shutting the machine down and resorting to manual adjustment of the blade holders to effect proper clearance. This adjustment becomes necessary frequently as the blades wear or their cutting action is otherwise impaired. I may also apply the same mechanism to each member of the pair of co-acting blades and obtain a greater adjustment in the clearance between blades. I may also effect this adjustment while the blades are stationary when occasion demands.</p> |
