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:
Jul. 13, 2021
Filed:
Dec. 21, 2018
Screen Holdings Co., Ltd., Kyoto, JP;
Yasushi Sasa, Kyoto, JP;
SCREEN HOLDINGS CO., LTD., Kyoto, JP;
Abstract
A device includes a storagefor storing a reference pattern corresponding to a part of a workpiece outer peripheral part, an imagerfor imaging the outer peripheral part at least for one turn of a workpiece by such imaging at a fixed point as to include at least a part of the outer peripheral part in an imaging field of view, an image processorfor detecting a region corresponding to the reference pattern by performing a pattern matching process, and a misalignment detectorfor detecting the misalignment based on information on a position of each of a plurality of the detected regions. The reference pattern corresponds in shape to a plurality of characteristic parts that present on the outer peripheral part, have shapes congruent to each other and have a mutually symmetrical positional relationship with respect to rotation about the center axis.