Helical Spring Beam-Tension Device
Original Publication Date: 1983-Dec-01
Included in the Prior Art Database: 2005-Feb-08
In ribbon cartridges, it is desirable to maintain a tension on the supply spool and on the exposed span of ribbon extending outside of the cartridge. Illustrated in the drawing is cartridge 10 providing extending arms 12 supporting a span of ribbon 14. The supply spool 16 is provided with a flange 18 which has formed in its periphery ratchet teeth 20. Pawl member 22 is pivotally supported on a pin-type structure 24 in the cartridge 10. Pawl member 22 includes the pawl 26 and lever arm 28 terminating in a ribbon-engaging guide member 30. Extending outwardly from the pawl assembly 22 is a short post 32 which has forced thereover one end of a coil spring 34.