Daisy-wheel printer with flexible drive shaft coupling - provides rapid movement between print and symbol reading positions and can tilt on hemispherical bearing

摘要

The drive shaft (7) for the 'daisy wheel' type disc and the printing hammer shaft (8) are each located in slide supports (10). The disc has a large number of type arms. In the printing position they are acted upon by a cam roller (12) to move them relative to the drive shaft (7) from a position where the printed symbols can be read and into the operating position and back again. The type disc (1) is tiltably arranged on a hemispherical bearing (11) of the drive shaft (7) and is rotatably adjustably connected to that drive shaft by a synchronising linkage (13) which permits the tilting motion. The printing hammer is moved by a drive lever (9) movable to-and-fro at its top end where it is linked to the hammer shaft end.