Typewriting machines – Including interposed inking device for record-medium – Ribbon – per se
Patent
1993-12-29
1995-05-09
Yan, Ren
Typewriting machines
Including interposed inking device for record-medium
Ribbon, per se
4002404, 400708, 250548, B41J 3109
Patent
active
054134250
ABSTRACT:
A printer ribbon distinguishing method and apparatus therefor, distinguishes a color ribbon, a black ribbon with a clear patch and a black ribbon without a clear patch in a sublimating type color printer. The apparatus has a first sensor having a characteristic in that light generated from a light emitting unit penetrates yellow, magenta and clear patches of a ribbon but does not penetrate cyan and black patches; a second sensor installed on a straight line with the first sensor widthwise of the ink ribbon and having a characteristic in that the light generated from the light emitting unit penetrates the yellow and clear patches of the ink ribbon but does not penetrate magenta, cyan and black patches; a third sensor installed on an opposite side of the first and second sensors widthwise of the ink ribbon but not on a straight line with the first and second sensors, and having a characteristic in that the light generated from the light emitting unit penetrates the yellow and clear patches but does not penetrate the magenta, cyan and black patches.
REFERENCES:
patent: 4710781 (1987-12-01), Stephenson
Samsung Electronics Co,. Ltd.
Yan Ren
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