Ribbon shield

Details Ribbon shield Ribbon shield

1981-02-09

1983-05-17

Apley, Richard J.

Typewriting machines

Including interposed inking device for record-medium

Package for ribbon facilitating mounting of ribbon on...

400248, B41J 3528

Patent

active

043837751

ABSTRACT:
An improved ribbon shield for use with a ribbon cassette in a printer. The shield snaps into the front of a ribbon cassette so as to cover an exposed portion of ribbon and prevent the smudging or wicking of ink onto a printing medium. The ribbon shield includes an elongated strip of flexible material such as polypropylene having a central aperture to enable the ribbon to pass through it for printing purposes. The shield includes a lower curved lead-in portion to accommodate paper motion past the cassette. The shield is held within the ribbon cassette in a flexible state. The flexed portion of the shield contacts the printing medium and forces it into close contact with the platen. Improved performance can be obtained by providing spacing ridges in the form of rings which surround the aperture.

REFERENCES:
patent: 733851 (1903-07-01), Koch
patent: 3643777 (1972-02-01), Anderson et al.
patent: 4165188 (1979-08-01), Rempel
patent: 4325645 (1982-04-01), Miyajima et al.

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