Ink ribbon cartridge

Details Ink ribbon cartridge Ink ribbon cartridge

1985-04-23

1986-11-18

Pieprz, William

Typewriting machines

Including interposed inking device for record-medium

Package for ribbon facilitating mounting of ribbon on...

400234, 4001961, D41J 3202

Patent

active

046232745

ABSTRACT:
An ink ribbon cartridge for use in an impact printer has a pair of spaced ribbon guide arms pivotally mounted on a cartridge case. An endless ink ribbon is stored in a storage space in the cartridge case. A feed roller is drivably mounted in the cartridge case. A roller guide is pivotally mounted in the cartridge case and has a hook engageable by a post on the rear end of one of the ribbon guide arms. A pressure roller is rotatably mounted on the roller guide and movable toward and away from the feed roller in response to angular movement of the roller guide. The pressure roller is normally urged by a spring to move toward the feed roller. The ribbon guide arms are angularly movable between an open position in which the post disengages from the hook to allow the pressure roller to be displaced toward the feed roller under the force of the spring for gripping the ink ribbon and feeding the same into the storage space in response to rotation of the feed roller, and a closed position in which the post engages the hook to cause the pressure roller to be displaced away from the feed roller against the force of the spring to release the ink ribbon from the feed and pressure rollers.

REFERENCES:
patent: 4273453 (1981-06-01), Haftmann
patent: 4290567 (1981-09-01), Saito
patent: 4397574 (1983-08-01), Wojdyla
patent: 4446790 (1984-05-01), Konkel et al.
patent: 4449838 (1984-05-01), Okamnra et al.
patent: 4479729 (1984-10-01), Irro
patent: 4497008 (1985-01-01), Schoenmakers

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