FERGBANDSANORDNING VID KONTORSMASKINER

摘要

Pivotally mounted plastic ribbon deck for an electronic business machine printer rotatably supporting two spools to normally present an operable position of ribbon in a lower inoperative position and liftable to move the ribbon to first or second upper operative positions by a rotatable plastic cam and a plastic lifting link, the latter being selectively moveable laterally to be engaged by different portions of the cam. Automatically reversible ribbon feed comprising a plastic feed pawl beam slidable on the ribbon deck and having one of two edge notches held by springs in engagement with a laterally oscillatable drive stud and one or the other of its pawl ends engaging a ribbon spool ratchet. When sliding of beam is prevented by ribbon resistance due to unwinding of all of ribbon from one spool to which its end is secured, the drive stud moves relative to the beam into engagement with the other edge notch and the springs tilt the beam to engage its other pawl end with the ratchet of the other spool to reverse the direction of the ribbon feeding.