Inspection method and inspection equipment for mouth section of bottle-can
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United States of America Patent
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Apr 19, 2016
Grant Date -
May 8, 2014
app pub date -
Jun 4, 2012
filing date -
Jun 6, 2011
priority date (Note) -
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Abstract
An inspection method and inspection equipment for mouth section of bottle-can including:
- first-inspection process for eliminating the bottle-can in which existence of a low-brightness area is detected from a monochrome inspection-image which is obtained by imaging the curl portion with irradiating white light to the curl portion in an imaging area of the bottle-can which is conveyed along a main-conveyance path; and a second-inspection process for judging quality of the bottle-can while conveying the bottle-can which is eliminated by the first-inspection process along a secondary-conveyance path, by irradiating illumination lights having two colors from different directions to the curl portion in the imaging area along substantially a tangential direction of a cylindrical surface of the mouth section so as to image a color inspection-image, and distinguishing existence or not of the asperity on the curl portion from signal strengths of the light colors of the color inspection-image.
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