Ink ribbon cassette including means for identifying the type of

Details Ink ribbon cassette including means for identifying the type of Ink ribbon cassette including means for identifying the type of

1987-01-06

1989-11-14

Wright, Jr., Ernest T.

Typewriting machines

Including interposed inking device for record-medium

Means auxiliary to ribbon mechanism

400 17, 400 70, 400 76, 4001442, 4001573, 400208, 400320, 4007051, B41J 3536

Patent

active

048803251

ABSTRACT:
An improved ink ribbon cassette for a serial printing apparatus comprises a body, first and second substantially coextensive spaced ink ribbon guide arms projecting from the body, each having a free end, and an ink ribbon mounted in the body for advancement during printing and having a portion extending between the free ends of the guide arms so as to be available for printing. One of the guide arms has a window therein through which the ribbon is visible. A first optically detectable indicator is carried on the ribbon at a position to be visible through the window when the ribbon is substantially exhausted. A second optically detectable structure is mounted on the guide arm adjacent the window and laterally spaced therefrom in the direction of movement of the ribbon. This second optically detectable structure indicates the type of ribbon in the cassette.

REFERENCES:
patent: 554706 (1896-02-01), Manvell
patent: 2174351 (1939-09-01), Neidich
patent: 3346090 (1967-10-01), Goff, Jr. et al.
patent: 3731781 (1973-05-01), Caudill et al.
patent: 4115013 (1978-09-01), Hedstrom
patent: 4146338 (1979-03-01), Hedstrom
patent: 4494886 (1985-01-01), Kondo et al.
patent: 4586837 (1986-05-01), Johnson et al.
patent: 4655624 (1987-04-01), Kondo et al.

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