US 12,287,310 B2
Method for classifying a package
Mikael Larsson, Flyinge (SE); and Andreas Eriksson, Löddeköpinge (SE)
Assigned to Tetra Laval Holdings & Finance S.A., Pully (CH)
Appl. No. 17/792,922
Filed by Tetra Laval Holdings & Finance S.A., Pully (CH)
PCT Filed Aug. 20, 2021, PCT No. PCT/EP2021/073194
§ 371(c)(1), (2) Date Jul. 14, 2022,
PCT Pub. No. WO2022/043230, PCT Pub. Date Mar. 3, 2022.
Claims priority of application No. 20192710 (EP), filed on Aug. 25, 2020.
Prior Publication US 2023/0341304 A1, Oct. 26, 2023
Int. Cl. G01N 3/08 (2006.01); B65B 25/00 (2006.01); B65B 55/00 (2006.01); B65B 57/00 (2006.01); G01N 3/06 (2006.01); G01N 35/04 (2006.01)
CPC G01N 3/08 (2013.01) [B65B 25/001 (2013.01); B65B 55/00 (2013.01); B65B 57/00 (2013.01); G01N 3/06 (2013.01); G01N 35/04 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A method of classifying a package based on stiffness of the package, wherein the package is made of a carton material and is filled with food product, said method comprises
applying a force on the package,
measuring a deformation of the package caused by the force,
detecting packages that have had water leak into the carton material based on the deformation, and
classifying the package as belonging to a first category if the deformation is within a threshold interval, otherwise classifying the package as belonging to a second category, to thereby distinguish packages in which water has leaked into the carton material from those packages that have been able to withstand the water;
wherein the carton material includes a cellulose based material which becomes softer when water leaks into the carton material to result in the deformation.