CONSTANT RIBBON TENSION DEVICE
Original Publication Date: 1976-Jul-31
Included in the Prior Art Database: 2004-Mar-27
Xerox Disclosure Journal
In the drawing, ribbon 10 (contained in cartridge 11) is drawn from supply reel 12 by ribbon feed means (not shown), The ribbon 10 is drawn around the curved end of a 9danceru arm 13. A friction arm 14 is in contact with the periphery of the wound ribbon on the supply reel 12. Arms 13 and 14 utilize one~piececonstruction, As the ribbon 10 is drawn from the supply reel 12, arm 14 acts to provide optimum drag, creating progressively less drag force as the ribbon diameter decreases. Arm 13 is flexed upward when the ribbon feed means tries to overcome the inertia of the supply reel 12. The wrap angle or area of contact between the ribbon 10 and the curved end of arm 13 decreases as the amount of ribbon on the supply reel 12 becomes less with a correspond~ ing decrease in the inertia of the supply reel.