Ribbon monitor for ribbon cassette

Details Ribbon monitor for ribbon cassette Ribbon monitor for ribbon cassette

1983-03-23

1985-01-01

Burr, Edgar S.

Typewriting machines

Including interposed inking device for record-medium

Package for ribbon facilitating mounting of ribbon on...

400249, 242199, B41J 3528

Patent

active

044914300

ABSTRACT:
A ribbon cassette includes an impeller actuating element mounted at the end of a ribbon guide roller. A feed reel, on which the ribbon is mounted, rotates the guide roller, by means of the ribbon, and is mounted so as to be displaceable relative to the guide roller. The ribbon continues to rotate the guide roller as it is transported from the reel. When the remaining ribbon is at a specific length, the core of the reel halts the impeller, thereby discontinuing signals in a scanning device. Nevertheless the remaining ribbon can still be unreeled from the feed reel. The scanning of the movement of the impeller can be carried out by using a sensing mandrel attached to a spring member.

REFERENCES:
patent: 4213575 (1980-07-01), Firth et al.
patent: 4406553 (1983-09-01), Nally et al.
patent: 4406554 (1983-09-01), Dreinhoff et al.

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