Printing device having a ribbon cassette with a end of ribbon se

Details Printing device having a ribbon cassette with a end of ribbon se Printing device having a ribbon cassette with a end of ribbon se

1991-02-06

1992-05-05

Burr, Edgar S.

Typewriting machines

Including interposed inking device for record-medium

Means auxiliary to ribbon mechanism

400219, 400703, 400239, B41J 3536

Patent

active

051102293

ABSTRACT:
A printing device including a mounting base on which a ribbon cassette accommodating a ribbon having a transparent terminal end part is removably loaded, light emitting and receiving elements fixed on the mounting base and a reflective plate fixed on the mounting base, wherein when the ribbon in the ribbon cassette loaded on the mounting base comes to the end, light emitted from the light emitting element impinges upon and reflects back from the reflective plate through the transparent terminal end part of the ribbon interposed between the light emitting element and the reflective plate and then enters into the light receiving element.

REFERENCES:
patent: 3901986 (1975-08-01), Brockett et al.
patent: 4115013 (1979-09-01), Hedstrom
patent: 4146338 (1979-03-01), Hedstrom
patent: 4321286 (1982-03-01), Scott et al.
patent: 4401394 (1983-08-01), Hume et al.
patent: 4492483 (1985-01-01), Guillaume
patent: 4612446 (1986-09-01), Suzuki
patent: 4636097 (1987-01-01), Goubeaux
IBM Tech. Discl. Bulletin, Feb. 1981, Bullock.

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