Optically controlled multi-color impact printer

Details Optically controlled multi-color impact printer Optically controlled multi-color impact printer

1985-04-08

1986-05-13

Sewell, Paul T.

Typewriting machines

Including interposed inking device for record-medium

Means auxiliary to ribbon mechanism

400124, 400229, 4002404, B41J 3504, B41J 3516

Patent

active

045883165

ABSTRACT:
An inherently rugged multi-color dot matrix impact printer having a yoke type optical code detector assembly mounted on the neck portion of an impact dot matrix print head through which a multi-colored print ribbon passes. The print ribbon is configured in alternating vertical segments of selected colors of ink which have top and bottom photo-optical code regions on the outer edge of the ribbon. Coding comprises the presence or lack of an aperture in the form of a hole which is adapted to pass light therethrough and which is aligned with each ink segment. The yoke additionally includes upper and lower light emitter/sensor pairs for sensing the coded aperture pattern to control the presence of a predetermined colored segment of printing ribbon in front of the print head.

REFERENCES:
patent: 3941051 (1976-03-01), Barrus et al.
patent: 4091913 (1978-05-01), Ku
patent: 4110050 (1978-08-01), Wood
patent: 4114750 (1978-09-01), Baeck et al.
patent: 4165188 (1979-08-01), Rempel
patent: 4289069 (1981-09-01), Mellisa et al.
IBM Tech. Disc. Bulletin, by E. N. Dials, vol. 23, No. 9, Feb. 1981, pp. 9-4200.
IBM Tech. Discl. Bull., vol. 22, No. 7, Dec. 1979, pp. 2633-2635, "Multicolor Printing", G. N. Baker et al.

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