Arrangement for monitoring the operation of the ink ribbon of an

Details Arrangement for monitoring the operation of the ink ribbon of an Arrangement for monitoring the operation of the ink ribbon of an

1982-03-10

1983-10-04

Burr, Edgar S.

Typewriting machines

Including interposed inking device for record-medium

Package for ribbon facilitating mounting of ribbon on...

400249, B41J 3528

Patent

active

044075936

ABSTRACT:
An arrangement for monitoring the operation of the ink ribbon (2) of an ink-ribbon magazine (1) for electromechanical print units or print mechanisms comprises contacts (12,6) on the ink-ribbon magazine (1) on either side of the ink ribbon's path (4) and intended to lie against the ink ribbon (2), and opposite contacts (7,8) on the print unit which, when the ink ribbon magazine (1) is inserted, are in contact with the contacts (21,6) of the later and are connected electrically to a function or malfunction indication (10). When holes or tears occur on the ink ribbon (2), the contacts (12,6) on the ink-ribbon magazine (1) come in contact with one another and thereby set off a signal which can be used to switch off the print unit and/or for a malfunction indication.

REFERENCES:
patent: 549421 (1895-11-01), Ashby
patent: 3666203 (1972-05-01), Sato et al.
patent: 3819029 (1974-06-01), Simmons, Jr.

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