Replaceable inking cartridge with depletion counter

Typewriting machines – Including interposed inking device for record-medium – Endless ribbon or cartridge therefor

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Details

400197, 4002024, 400208, 400249, B41J 3528

Patent

active

046360972

ABSTRACT:
There is disclosed a replaceable inking cartridge for a printer. The inking cartridge includes an arrangement for indicating when the inking medium of the cartridge has been spent. The indicating arrangement is non-resettable so that the user is prevented from using a spent cartridge for additional printing. The indicating means is useful for signalling the user or the printer about the spent condition of the cartridge.

REFERENCES:
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patent: 3167264 (1965-01-01), Ohtsu
patent: 3561581 (1971-02-01), Takenaka
patent: 3604549 (1971-09-01), Candill et al.
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patent: 4111378 (1978-09-01), Barwick
patent: 4115013 (1978-09-01), Hedstrom
patent: 4132485 (1979-01-01), Hess
Spotts, Design of Machine Elements 5th Ed. Prentice-Hall Englewood Cliffs, N.J., pp. 491, 493, 1978.
Candill, "Ribbon Usage Indicator" IBM Technical Disclosure Bulletin vol. 8, No. 8, Jan. 1966, pp. 1137-1138.

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