Acoustic imaging is one of the few methods that can nondestructively image hidden, obscured or overprinted micrometer-scale defects as well as inclusions in the seal area in the heat seals of film-sealed and flexible packages. Our research has shown that an acoustic method may prove to be the best basis for the development of an on-line sensor capable of accurate 100% inspection of heat seals at production-line speeds. Ultrasound has proven an effective and precise way to image defects in materials used for shelf-stable food packaging, and to detect them to the limits of resolution of the equipment used.
| Number of Pages : | 9 |
| Published : | 11/01/2000 |
