ALEXANDRIA, Va., April 21 -- United States Patent no. 12,607,569, issued on April 21, was assigned to DAIICHI JITSUGYO VISWILL Co. LTD. (Osaka, Japan).
"Visual inspection system for annular product" was invented by Koji Matsui (Osaka, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "The present invention includes a holding unit holding an annular product, a rotation drive unit causing the holding unit holding the annular product to rotate about a center axis of the annular product, a first illumination unit having a line-shaped light projector along a radial direction of the annular product and radiating a filmy illumination light from the light projector to an outside surface of the annular product, a l...