| 摘要 |
<p>An automatic tape threading apparatus for a magnetic tape transport uses a pantograph mechanism (44) to determine the path (48) of a coupling pin (46) engageable with the leader block (18) on the free end of a tape (16) wound on a supply reel (14) In a replaceable cartridge (12). The pantograph mechanism comprises a rotatable arm (54) mounted on the shaft (66) of a motor, a coupler guide arm (52) pivotally connected thereto, a follower arm (60) pivotally connected to the coupler guide arm and carrying a cam follower (64), and a link (66) pivotally connecting the rotatable arm and the follower arm. The cam follower (64) is engaged in a cam groove in a cam plate 42, which forces the follower to describe a path (41) which represents the pin path (48) on a reduced scale. Rotating the rotatable arm causes the pin to follow the path in a sweeping motion past tape guides (30,31,34,36) and a transducer (32) into a take-up reel (28). This draws the tape out along a tape path (50) and connets it to the take-up reel.</p> |
