| 摘要 |
PROBLEM TO BE SOLVED: To provide a device and method by which a package containing a packing material, such as a food, miscellaneous good, beauty product, heat insulating material, etc., and evacuated can be inspected easily for vacuum break and degree in a short time. SOLUTION: The device for inspecting package is provided with an ultrasonic transmission sensor provided closely to one surface of the evacuated package, an ultrasonic reception sensor provided closely to the surface of the package on the side opposite to the above surface, and a means which measures the internal pressure of the package from the transmitted sound pressure detected by means of the reception sensor. COPYRIGHT: (C)2004,JPO
|
