| abstract |
1,083,475. Testing containers for leaks. BALZERS PATENT-UND LIZENZ-ANSTALT. Dec.6, 1965 [Dec. 18, 1964], No. 51645/65. Addition to 998, 908. Heading G1S. The method of testing capsules for leaks of Specification 998, 908 is modified to provide a vapour source in the capsule to be tested which is introduced in a condensed form to vaporize at the predetermined test temperature. Liquid vapour sources such as alcohol, ether or benzene may be used, or alternatively a solid substance such as camphene may be introduced into the capsule. |