| 摘要 |
<p>A tape-transport device (1) comprises reel means with a rotatable reel (4) containing a length of tape (3) which as it is unwound is moved in its longitudinal direction away from the reel (4) with a first speed (n.V O), guide means (9, 10) over which the tape is movable to cooperate with process means (7) of a tape-process apparatus (6), a second speed (V t) with which the tape (3) moves over the guide means (9, 10) being variable in magnitude relative to the first speed (n.V O), and buffer means (11) comprising a buffer-control means which controls a tape buffer situated in the tape path between said reel (4) and the guide means (9, 10) for isolating the reel rotation relative to the movement of the tape (3) over the guide means (9, 10). For this purpose the buffer means (11) comprise an endless belt (12) which is driven by drive means (17) near side facing the guide means (9, 10) with a speed (V t) which corresponds to the second speed of the tape (3) over the guide means (9, 10). The buffer-control means comprises a guide section (12b) of the running belt (12), over the outer side of which guide section (12b) the length of tape of the tape buffer guided, the length of the guide section (12b), as the belt (12) is driven, being variable to control the tape buffer over the tape-transport path from the entry to the exit point of the tape (3), in such a way that the speed of the belt near the entry point of the tape (3) corresponds to the first speed (n.V O) of the tape (3) when it leaves the reel (4).</p> |
