Ribbon cassette for a typewriter or the like

Details Ribbon cassette for a typewriter or the like Ribbon cassette for a typewriter or the like

1991-01-04

1992-03-03

Burr, Edgar S.

Typewriting machines

Including interposed inking device for record-medium

Package for ribbon facilitating mounting of ribbon on...

188 83, 188166, 242 7545, 400234, B41J 3528

Patent

active

050926942

ABSTRACT:
In a ribbon cassette for a typewriter or the like, comprising a housing, a take-off spool core rotatably seated in the housing, on which a take-off ribbon spool is wound, and a take-up spool core, also rotatably seated in the housing, where the take-off spool core is rotatably seated in the housing vertically to its axis of rotation, and where a loop brake spring with two legs and with a section in the shape of a segment of a circle connecting the legs and looping around the take-off spool core is provided, an expanding guide device (19) on the housing, which acts on the spring legs (14, 15) for achieving an even and defined ribbon tension, is provided in such a way, that with increasing unwinding and corresponding displacement of the takeoff spool (5) in the housing (1), the spring legs (14, 15) are increasingly spread open, while the braking force is reduced.

REFERENCES:
patent: 4502801 (1985-03-01), Hefti et al.
patent: 4505605 (1985-03-01), Hasegawa et al.
patent: 4609298 (1986-09-01), Shioda
patent: 4623273 (1986-11-01), Gubau

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