| 摘要 |
<p>PURPOSE:To make the work of a guiding part simple by carrying out a guide of a magnetic tape wound around a cylinder through a guiding groove with a specified shape. CONSTITUTION:The guiding part to control a position of a reference edge of the magnetic tape T obliquely wound around a portion of the peripheral surface of the cylinder is made as guiding surface Gb in the state that the portion corresponding to a position previously decided such that the reference edge of the magnetic tape T is notched by a specified depth Wgb vertically from the surface S of a fixed cylinder 12. The cylinder surface of a magnetic surface side of the tape T being controlled the position of the reference edge with the surface Gb is constituted as the guiding groove Gg formed as an acute angle slope Gw of a specified angle alpha near to a right angle against the surface Gb from the edge part (d) at the inner side of the surface Gb. With this configuration, the work of the guiding part of the cylinder is remarkably simply carried out.</p> |
