The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 30, 1983
Filed:
Oct. 13, 1981
James G Hume, San Ramon, CA (US);
John Sidvers, Pleasanton, CA (US);
Harold S Foster, Fremont, CA (US);
Xerox Corporation, Stamford, CT (US);
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.