Endless ink ribbon cassette having selective ribbon tension cont

Details Endless ink ribbon cassette having selective ribbon tension cont Endless ink ribbon cassette having selective ribbon tension cont

1983-12-23

1986-07-22

Wright, Jr., Ernest T.

Typewriting machines

Including interposed inking device for record-medium

Endless ribbon or cartridge therefor

400201, 4002024, 400234, 400235, 4002404, B41J 3202

Patent

active

046015949

ABSTRACT:
An ink ribbon cassette for a printer includes a ribbon storage chamber in which an endless ink ribbon is stored. The ribbon has a portion lying outside the chamber, and is movable out of and into the chamber by a feed roller. A roller is provided in the vicinity of the ribbon outlet of the chamber. A spring is provided adjacent to the chamber for holding the ribbon against the roller to impart tension to the outwardly lying ribbon portion. A lever contacts the spring, and is rotatable to deform the spring so that the spring may hold the ribbon against the roller with an increased force.

REFERENCES:
patent: 2838250 (1958-06-01), Stavrakis et al.
patent: 3758012 (1973-09-01), Bonner et al.
patent: 4071133 (1978-01-01), Scherrer et al.
patent: 4290567 (1981-09-01), Saito
patent: 4304374 (1981-12-01), Okamura et al.
patent: 4394989 (1983-07-01), Moris
patent: 4397574 (1983-08-01), Wojdyla
patent: 4406553 (1983-09-01), Nally et al.
patent: 4407595 (1983-10-01), Gershnow
IBM Technical Disclosure Bulletin, "Molded Ribbon Cartridge with Brake", Craft, vol. 25, No. 12, May 1983, pp. 6676-6677.

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