Patent ID: 6477892
Filing Date: 2002-11-12
Classification: B41J,B65H,G01B

Abstract:
A print media roughness detection mechanism comprising:a surface-engaging member configured to physically engage a print media surface; a reflective member joined with the surface-engaging member and having a footprint; one or more light sources in operable proximity to the reflective member and configured to project light energy toward the reflective member from a position outside of the footprint; and a position detector mounted in operable proximity to and outside of the footprint of the reflective member and configured to receive light energy that is reflected from the reflective member, the surface-engaging member being configured for displacement by the print media's surface in accordance with variations in the roughness of the surface sufficiently so that light that is reflected by the reflective member and received by the position detector can be utilized to ascertain a measure of the print media's roughness.