| 摘要 |
<p>A testing method comprising introducing into a pressure chamber (2) a batch of gable-top, plastics-coated paperboard cartons (10) containing a liquid, closing the chamber (2), supplying air under pressure to the interior of the chamber 2 exteriorly of the cartons (10) to a pressure level sufficient to cause the air to penetrate potential leakage paths between the outside of at least one of the cartons and the interior of the latter carton (s), whereby the air penetrates into the interior of the latter carton(s), and, after a period of time, reducing the pressure level, whereupon the air which has penetrated into the interior of the latter carton(s) causes outward bulging of the side walls of the latter carton (s).</p> |
