Universal end of ribbon sensing system

Details Universal end of ribbon sensing system Universal end of ribbon sensing system

1981-10-13

1983-08-30

Sewell, Paul T.

Typewriting machines

Including interposed inking device for record-medium

Package for ribbon facilitating mounting of ribbon on...

400249, 250570, B41J 3200, B41J 3536

Patent

active

044013949

ABSTRACT:
An end-of-ribbon sensing system which is equally compatible with various arrangements of light emitters and light detectors as utilized in different models of serial impact printers, the sensing system including a unique compound reflector, having a first reflective portion for use in cooperation with one sensing device and having a second reflective portion for use in cooperation with another sensing device. A clear transparent tape segment located near the end of the ribbon is provided to allow light to pass from a light source on the sensors to the reflective portions and back to a photodetector on the sensors.

REFERENCES:
patent: 4195913 (1980-04-01), Dourte et al.
patent: 4307969 (1981-12-01), Daughters
IBM Technical Disclosure Bulletin, vol. 23, No. 9, Feb. 1981, pp. 3955-3956.

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