Ribbon feed tension mechanism

Details Ribbon feed tension mechanism Ribbon feed tension mechanism

1985-04-30

1987-04-28

Wright, Jr., Ernest T.

Typewriting machines

Including interposed inking device for record-medium

Ribbon-feeding mechanism

400208, B41J 3352

Patent

active

046610049

ABSTRACT:
Member (9) has a tension arm (13) over which ribbon (3) feeds. Biasing arm (17) presses member (9) toward brake surface (7), with slot (21) moved until it encounters stud (23). At low tension of ribbon (3), brake surfaces (11) and (7) press and hold ribbon (3). As feed tension increases tension arm (13) forces member (9) back until stud (23) encounters the opposite end of slot (21), after which slightly higher force further opens the brake and arm (13) continues to provide feed tension. The mechanism is small, efficient, smooth functioning, and suited to incorporation as part of a ribbon cartridge.

REFERENCES:
patent: 3642225 (1972-02-01), Kakichi et al.
patent: 3961763 (1976-06-01), Somers
patent: 4034935 (1977-07-01), Plaza et al.
patent: 4388006 (1983-06-01), Waibel
patent: 4402621 (1983-09-01), Abell, Jr. et al.
patent: 4408908 (1983-10-01), Applegate et al.
patent: 4413919 (1983-11-01), Applegate et al.
patent: 4468139 (1984-08-01), Hattori
IBM Technical Disclosure Bulletin, "Ribbon Feed Mechanism", Craft, vol. 27, No. 1A, Jun. 1984, pp. 204-207.
IBM Technical Disclosure Bulletin article entitled "Molded Ribbon Cartridge With Brake," by J. A. Craft, vol. 25, No. 12, May 1983, at pp. 6676-6677.

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