| 摘要 |
A ribbon drive for an ink printer ribbon housed in a cartridge and mounted on a reciprocating print head carriage is disclosed. The ribbon drive includes a vertically oriented drive shaft supported on the carriage for rotary motion. A pair of hubs are supported one above the other on the shaft by oppositely operating one-way clutch bearings. Each of the hubs has coiled therearound a constant force, self-coiling band spring. An end of each of the band springs is secured to the printer frame. As the print head carriage translates, the drive shaft is alternately driven by the hubs as the springs wind and unwind therefrom.
|
