Patent ID: 7779674

Claim:
Method for testing bottles or containers having flexible walls comprising the steps of: a) determining at least one Level/Pressure calibration curve at at least one measurement point (P, P 1 , P 2 ) based upon measurements carried out on a plurality of sealed sample bottles or sealed containers; b) measuring ( 130 , 230 ) the fill level (R) of a bottle or container; c) rejecting ( 140 , 240 ) the bottle or container in the case in which the measured fill level (R) is outside of a predetermined range (Rmin, Rmax) of fill levels; d) determining ( 150 , 250 ) a range ((Tp min, Tp max), (Tpl min, Tp max)) of acceptable pressures in a first (P, P 1 ) of said at least one measurement point, based upon the corresponding calibration curve constructed at step a) and based upon the fill level (R) measured at step b), in the case in which the measured value is within said predetermined range (Rmin, Rmax) of fill levels; e) measuring ( 160 , 260 ) the pressure (Tp, Tp 1 ) of said bottle or container at said first measurement point (P,P 1 ); f) discarding ( 180 , 190 , 265 , 270 ) said bottle or container, if the pressure (Tp, Tp 1 ) measured at step e) is outside of the range of pressures ((Tp min, Tp max), (Tpl min, TP max)) determined at step d); g) keeping ( 170 ) said bottle or container, if the pressure (Tp, Tp 1 ) measured at step e) is within the range of pressures ((Tp min, Tp max), (Tpl min, TP max)) determined at step d).