| 摘要 |
A strip material handling mechanism comprises a rotatable sprocket wheel for moving strip material along a threading path in either of two directions through an openable sound gate having opposed pressure pads, a capstan drive assembly including a capstan and a pressure roller, and a single control element for enabling independent opening of the sound gate and capstan drive assembly during reverse projection. Utilizing a single control element, the pressure roller and one of the pressure pads are independently disengaged from the strip material during such operational mode, thereby permitting the rotatable sprocket wheel to move strip material substantially free of restraint that might otherwise be imposed by such pressure roller and pad.
|
