| 摘要 |
<p>A magnetic tape cassette has a pair of spaced-apart reels (16) rotatably mounted on a support wall (18). A length of tape (22) has its opposite ends secured respectively to the two reels (16) and its intermediate portion wound around the reels to form coresponding tape rolls whose diameters vary inversely as the tape is simultaneously unwound from one reel and wound onto the other. The two rolls have outer tape convolutions with recording surfaces (27) thereon facing each other. Tape cleaning means (10) is interposed between, and biased into contact with, the outer convolution facing surfaces (27) for continuously cleaning those surfaces as the tape (22) is unwound from one reel (16) and wound onto the other. <IMAGE></p> |
