Cartridge for a printing ribbon

Details Cartridge for a printing ribbon Cartridge for a printing ribbon

1988-10-19

1990-02-27

Pieprz, William

Typewriting machines

Including interposed inking device for record-medium

Means auxiliary to ribbon mechanism

400208, B41J 3200, B41J 3504

Patent

active

049040979

ABSTRACT:
A cartridge for a printing ribbon for a typewriter having a character-carrying disc comprises a casing and two oscillating arms between the ends of which a run of the ribbon extends in a straight line on the outside of the casing between the disc and the platen. The arms oscillate from a rest position in which they make the typing point visible, to three or more working positions in which they make it possible to print using one of three tracks of the ribbon. The two oscillating arms are pivoted by means of pins on seats of fixed supports of the casing. Pivotally mounted at the free end of each arm is a guide element, a stem of the guide element being received in a sleeve of the arm. Each guide element is thus capable of modifying its angular position with respect to the respective arm in response to the selection movement so that the ribbon is always held in tension in a uniform manner, irrespective of the track selected.

REFERENCES:
patent: 3900099 (1975-08-01), Hengelhaupt
patent: 3960259 (1976-06-01), Guerrini et al.
patent: 4003460 (1977-01-01), Gray et al.
patent: 4084683 (1978-04-01), Moss
patent: 4397575 (1983-08-01), Aldrich
patent: 4601596 (1986-07-01), Musso
patent: 4645363 (1987-02-01), Andersson
patent: 4660902 (1987-06-01), Ukmar et al.
patent: 4728207 (1988-03-01), Foster
Kockler et al., "Uniform Ribbon Tension . . . ", Xerox Disclosure Journal, vol. 4, No. 2, pp. 181-182, 3/4-79.
Plaza, "Multi-Track Ribbon Lift Control", Xerox Disclosure Journal, vol. 4, No. 3, p. 413, 5/6-79.
Sendelweck et al., "Ribbon Lift Guide Motion", IBM Technical Disclosure Bulletin, vol. 13, No. 12, p. 3671, May, 71.

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