Identification of recording media

Details Identification of recording media Identification of recording media

2005-01-04

2005-01-04

Allen, Stephone B. (Department: 2878)

Radiant energy

Photocells; circuits and apparatus

With circuit for evaluating a web, strand, strip, or sheet

C250S559160, C250S559400, C356S446000

Reexamination Certificate

active

06838687

ABSTRACT:
The present invention is a method and device for identifying recording media in a printer. The invention utilizes fine structure of the media revealed by illumination from one or more directions to distinguish among different kinds of plain papers, coated papers, such as glossy papers, and transparency films. Multiple light sources at different incidence and/or orientation angles apply light on the test surface, and scattered light is converted into signals and then analyzed. Various metric and analysis techniques can be applied to the signals to determine the media type.

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