Ink ribbon tensioner for typewriter ribbon cassette - uses sprung pivotable braking arms for automatic tensioning after each ribbon change

摘要

The ink ribbon tensioner for a typewriter or similar ink ribbon cassette contains a braking device with a brake disc (129) rotatably mounted in a cassette holder and coupled to a supply spool (25). A sprung, pivotable braking arm (133) interacts with the disc via a striker arm (134). The ribbon is tensioned by a guide element on a carrier arm of the brake lever, forming a loop between guide pins (147, 149). The brake lever is disengaged from the disc and ribbon for changing the cassette.