US 12,265,035 B2
Method for detecting defects of the horizontal mold seal for glass containers
Lubin Fayolle, Brignais (FR); and Julien Fouilloux, Lyons (FR)
Assigned to TIAMIA, Saint-Genis-Laval (FR)
Appl. No. 18/265,004
Filed by TIAMA, Saint-Genis-Laval (FR)
PCT Filed Dec. 9, 2021, PCT No. PCT/FR2021/052261
§ 371(c)(1), (2) Date Jun. 2, 2023,
PCT Pub. No. WO2022/136761, PCT Pub. Date Jun. 30, 2022.
Claims priority of application No. 2013948 (FR), filed on Dec. 22, 2020.
Prior Publication US 2024/0003823 A1, Jan. 4, 2024
Int. Cl. G01N 21/90 (2006.01); G01N 21/88 (2006.01)
CPC G01N 21/9054 (2013.01) [G01N 21/8851 (2013.01); G01N 2021/887 (2013.01); G01N 2021/8887 (2013.01)] 24 Claims
OG exemplary drawing
 
1. A method for detecting, on the finish (B) of glass containers (R) each having a vertical axis (Z), defects in the horizontal mold seal (JH), the method comprising, for the detection of defects for each container, the following steps:
disposing the container (R) between a light source (3) and an image capture camera (4) whose optical axis of observation is substantially perpendicular to an axis parallel to the vertical axis (Z) of the container and whose field of view comprises at least the left edge of the finish or the right edge of the finish, including at least part of the horizontal mold seal;
ensuring the rotation of the container (R) on itself along the vertical axis (Z) according to at least one rotational revolution;
acquiring by the camera (4), at each increment of rotation of the container, an image so that the number of images per rotational revolution is greater than 36;
analyzing for each container, the images captured such that:
a finish inspection zone (ZI) over a height of the finish including at least part of the horizontal mold seal is defined in the images;
the profile (P) of the finish edge is detected in the image inspection zone;
the profiles of the finish edge (P) of the images are compared with a reference profile (Pf) of the finish edge, so as to detect deviations between these profiles of the finish edge and the reference profile of the finish edge;
and a defect in the horizontal mold seal (JH) for a container is detected when at least one image of said container has a deviation.