Wrap brake spring for the take-off core of an inked ribbon cartr

Details Wrap brake spring for the take-off core of an inked ribbon cartr Wrap brake spring for the take-off core of an inked ribbon cartr

1989-08-30

1991-09-03

Burr, Edgar S.

Typewriting machines

Including interposed inking device for record-medium

Ribbon-feeding mechanism

400208, 400242, B41J 3314

Patent

active

050447955

ABSTRACT:
The spring (6) has two radially aligned legs (7, 8) and a circular-segment-shaped web (9) connecting the legs. The web (9) is inserted with initial stress in a circumferential groove (10) of an unwinding core (3). The free end of the leg rests against a stop (11). The free end of the leg (8) is bent at a right angle. The right-angle bend forms a deflecting organ (12), around which the ribbon (5) is fed. The surface of the spring (6) is roughened and abrasive at least in the area of the web (9). The spring (6) is preferably phosphatized for this purpose. By means of this design, a uniform ribbon tension over the entire running time of the ribbon is achieved.

REFERENCES:
patent: 4013160 (1977-03-01), Colecchi
patent: 4147439 (1979-04-01), Colecchi
patent: 4347008 (1982-08-01), Jagodzinski et al.
patent: 4456193 (1984-06-01), Westover
patent: 4684272 (1987-08-01), Watanabe
patent: 4780011 (1988-10-01), Hasegawa et al.

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