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:
May. 28, 2002
Filed:
Aug. 01, 2000
Li-Fu Sung, San-Chung, TW;
Yung-Yi Li, Yung-Kang, TW;
Acer Communications and Multimedia Inc., Taipei, TW;
Abstract
An ink ribbon positioning system of a color printer for identifying various positions of a color ink ribbon of the color printer. The ink ribbon includes a plurality of sequentially arranged color frames for storing different color dyes. The color printer includes a thermal print head for printing the color dyes onto an object and a driving device for scrolling the ink ribbon relative to the thermal print head. The ink ribbon positioning system includes first and second light sources for emitting light beams through the ink ribbon, an optical sensor for detecting the light beams penetrating through the ink ribbon, and an identification device electrically connected to the first and the second light sources. When the driving device scrolls the ink ribbon relative to the thermal print head, the identification device will control the first and the second light sources and identify the position of each of the color frames of the ink ribbon according to an output voltage generated by the optical sensor.