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:
Sep. 21, 2004
Filed:
Jan. 04, 2002
George H. Barbehenn, Gilbert, AZ (US);
Freescale Semiconductor, Inc., Austin, TX (US);
Abstract
A print media sensor ( ) according to the present invention determines a print medium type by utilizing an ultrasonic transducer ( ) to vibrate a print medium ( ) at a resonant frequency of the print medium ( ). The print medium ( ) is irradiated with light from an LED ( ). Sensors ( ) measure the amount of light reflected from and transmitted through the print medium ( ) while it is being vibrated at the resonant frequency. The ratio of the reflected to transmitted light is compared to a stored table of ratios that are associated with the resonant frequencies of specific print medium types and print medium ink volume and application rates. The results of these comparisons are used to determine the print medium type and the associated ink volume and application rate to be used for printing on the print medium ( ).