| 摘要 |
<p>A helical scan magnetic tape recorder (1) includes tape threading and guiding apparatus for threading magnetic tape (30) from a two reel cassette (2) about a rotary magnetic head scanner (11) and for tensioning the tape (30) during tape transport. The threading and guiding apparatus includes supply and take-up compliance elements (5, 6) which are mounted for movement between: 1) cassette loading positions behind a tape span (7a) in a magnetic tape cassette; 2) tape vacuum loading positions (5a, 6a) in which the elements (5, 6) draw tape (30) out of the cassette (2) and partially contact it with the rotary head scanner (11); and 3) operating positions (5b, 6b) in which the elements (5, 6) draw tape (30) around the respective supply and take-up capstans (12, 13) and tension the tape (30) during tape transport past the rotary head scanner (11).</p> |
