| 摘要 |
Apparatus for driving sheets comprises a track assembly, a first plurality of drive rollers and a cooperating set of back-up rollers for transporting sheets in a first direction along the track assembly, a second plurality of drive rollers and a cooperating set of back-up rollers for driving said sheets in a second direction with respect to the track assembly, into proper position to cause them to be transported by said first plurality of drive rollers and cooperating back-up rollers, and solenoid-operated actuating mechanism for simultaneously operating both sets of back-up rollers to cause one set of back-up rollers to be moved into operative position when the other set of back-up rollers is moved out of operative position. |
