| 摘要 |
<p>A video tape recorder has a cylindrical drum around which tape is guided in a helical wrap by means of a tape guide assembly. The assembly has at least two guides and preferably two pairs (9, 12) of approximately parallel guides, the two guides or the inner guides of each pair being disposed close to the drum (10) but spaced apart slightly to provide nearly 360 DEG of tape wrap angle. Each guide is a roller having its axis slightly tilted with respect to the axis of the drum. At least one of the guides is of tapering or part conical form so that movement of the height of the tape path away from a helical guide ridge (40) is resisted. The tilt of the guides is adjustable, adjustment of the outer guide of a pair altering the height of the tape with respect to the drum and adjustment of the inner guide of the pair altering the angle of entry or departure of the tape with respect to the drum.</p> |
