Belt-like glass film quality inspection method and glass roll

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United States of America Patent

PATENT NO 11346652
APP PUB NO 20190277623A1
SERIAL NO

16347220

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Abstract

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In cutting a band-shaped glass film along a longitudinal direction thereof and evaluating linearity of an end side formed in association with the cutting to inspect quality of a cut band-shaped glass film, the following steps are performed: an imaging step of dividing the end side into a plurality of segments and imaging each of the plurality of segments; a linear approximation step of calculating an approximate straight line of the end side based on a plurality of points different from each other on the end side in each of a plurality of images obtained in the imaging step; a variation calculation step of calculating a variation value of the plurality of points based on the approximate straight line; and an evaluation step of evaluating the linearity of the end side based on a plurality of variation values respectively corresponding to the plurality of images.

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Patent Owner(s)

  • NIPPON ELECTRIC GLASS CO. LTD

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Mitsugi, Kaoru Shiga, JP 18 153
Noguchi, Kazunari Shiga, JP 22 154

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