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. 14, 2002
Filed:
Sep. 29, 2000
Stuart A. Scofield, Battle Ground, WA (US);
Steven H. Walker, Camas, WA (US);
Hewlett-Packard Company, Palo Alto, CA (US);
Abstract
A system of classifying incoming media entering an inkjet printing mechanism identifies the media without requiring any special manufacturer markings. The media is first optically scanned using a blue-violet light at an initial intensity to obtain both diffuse and specular reflectance data. If useable, the data is compared with known values for different types of media to classify the media so an optimum printmode tailored for the particular media type is used. If the initial data is unusable, successive scanning passes are preformed to find useable diffuse data, and if found, then to find useable specular data. During these successive passes, following an initial calibration scan for the media, each successive scan reduces the scanner intensity until reaching a minimum intensity. If upon reaching the minimum intensity, no useable data has been found, then a default printmode is selected. A printing mechanism constructed to implement this method is also provided.