Ribbon platform mechanism for extending ribbon life

Details Ribbon platform mechanism for extending ribbon life Ribbon platform mechanism for extending ribbon life

1977-01-05

1979-01-02

Wright, Jr., Ernest T.

Typewriting machines

Including interposed inking device for record-medium

Including mechanism for shifting ribbon laterally at...

400225, B41J 3358

Patent

active

041324862

ABSTRACT:
The present mechanism includes a vertically moving platform which raises and lowers a printing ribbon relative to the moving printhead of a printer. When the printhead is at its home position, the platform is at its raised position thereby locating the lowermost portion of the ribbon at the printhead. As the printhead starts to move during its printing cycle, the platform will progressively lower so that when the printhead is at the center of its travel, the platform will be in its lowered position, thus locating the uppermost portion of the ribbon at the printhead. As the printhead continues to the end of its travel, the platform will end up at its raised position thus locating the lowermost portion of the ribbon at the printhead. This raising and lowering of the platform presents the ribbon to the printhead in overlapping arched patterns, thereby utilizing the full width of a printing ribbon.

REFERENCES:
patent: 662147 (1900-11-01), Gabrielson
patent: 2312314 (1943-03-01), Bordonaro
patent: 2557067 (1951-06-01), Atwood
patent: 3171530 (1965-03-01), O'Daniel et al.
patent: 3513957 (1970-05-01), Ricciardi et al.
patent: 3613857 (1971-10-01), Thevis et al.
patent: 3782521 (1974-01-01), Hengelhaupt
patent: 3871507 (1975-03-01), Perry et al.
patent: 3880271 (1975-04-01), Hebron
patent: 3993181 (1976-11-01), Potma et al.

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