| 摘要 |
PCT No. PCT/GB95/01010 Sec. 371 Date Nov. 1, 1996 Sec. 102(e) Date Nov. 1, 1996 PCT Filed May 3, 1995 PCT Pub. No. WO95/30137 PCT Pub. Date Nov. 9, 1995Packages (7) are conveyed through at least one, and preferably two, test stations (14, 16). At each station there is a test head (7) which is urged towards the conveying path, preferably by gravity. As a package (7) is conveyed through a station it displaces the head away from the path. The displacement is monitored. Preferably, subsequent displacement towards the path due to leakage of the package is also monitored.
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