Ribbon feeder for a printer having a tension mechanism

Details Ribbon feeder for a printer having a tension mechanism Ribbon feeder for a printer having a tension mechanism

1992-07-27

1994-02-08

Burr, Edgar S.

Typewriting machines

Including interposed inking device for record-medium

Ribbon-feeding mechanism

400218, 226195, 242147R, B41J 3314

Patent

active

052843963

ABSTRACT:
An object of the present invention is to provide a ribbon feeder to prevent a ribbon from slackening when a sheet is back-fed in a thermal printer. When a ribbon is fed from a ribbon feed roller, resistance is imparted to the rotation of the ribbon feed roller by a first spring. Further, resilient force is stored in a second spring by tension produced when the ribbon is fed from the ribbon feed roller. The ribbon tends to slacken when the sheet is back-fed, such slackening ribbon is rewound by reversely rotating the ribbon feed roller by the stored resilient force.

REFERENCES:
patent: 3665855 (1972-05-01), Nikoloff
IBM Technical Disclosure Bulletin, vol. 18, No. 12, May 1976 "Servo Controlled Typewriter Ribbon Take-Up Device".

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