Ribbon cartridge for printing machines

Details Ribbon cartridge for printing machines Ribbon cartridge for printing machines

1987-03-06

1988-12-06

Wright, Jr., Ernest T.

Typewriting machines

Including interposed inking device for record-medium

Package for ribbon facilitating mounting of ribbon on...

4001961, 4002351, 4002362, 400234, 400248, B41J 3200

Patent

active

047892560

ABSTRACT:
The ribbon (17) has an external run between the type element (25) and platen of a daisy-wheel typewriter. This run stretches between terminal members (59) which protrude from side arms (33 and 34) of the cartridge casing (18) and are fixed to the distal ends of arms (39, 41) pivotally mounted in the casing (18) at pivot (52). The arms (39, 41) are biased downwardly by wire springs (67) to expose the typing line. Ribbon lift levers of the typewriter raise the arms simultaneously to position a selected one of three tracks on the ribbon at the level of the typing point and a single drive shaft provides for the advancement of the ribbon. The cartridge comprises a feed spool and a take-up spool for the ribbon, a drive roller and a pressure roller which nip the ribbon internally to the casing, a transmission mechanism having a series of pinions and gears for transmitting the drive motion from the drive shaft of the typewriter to the pressure roller and to the take-up spool of the cartridge. A gear of the transmission mechanism is coaxial with the tke-up spool and is connected with the take-up spool by means of a friction clutch, which permits a slip motion between the gear and the take-up spool.

REFERENCES:
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patent: 3948382 (1976-04-01), Nesbitt et al.
patent: 4008795 (1977-02-01), Garberi et al.
patent: 4172672 (1979-10-01), Oddicini et al.
patent: 4231667 (1980-11-01), Behrendt et al.
patent: 4272202 (1981-06-01), Schroeder et al.
patent: 4307969 (1981-12-01), Daughters
patent: 4329075 (1982-05-01), Applegate et al.
patent: 4422786 (1983-12-01), Piptone
patent: 4601596 (1986-07-01), Musso
patent: 4611937 (1986-09-01), Sato et al.
patent: 4669902 (1987-06-01), Ukmar et al.

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