Method and apparatus for checking sealed containers for pinholes

PCT No. PCT/JP80/00193 Sec. 371 Date May 3, 1981 Sec. 102(e) Date May 1, 1981 PCT Filed Aug. 22, 1980 PCT Pub. No. WO81/00765 PCT Pub. Date Mar. 19, 1981.This invention relates to a method of and an apparatus for checking sealed containers for pinholes in a vacuum which containers have enclosed therein a vaporizable material, such as a glucose injection solution, distilled water for injection, milk or oil, or a sublimable substance, such as naphthalene (hereinafter referred to collectively as a "vaporizable substance"). With this invention, the vaporizable substance adhering to the sealed container and remaining in a checking chamber is vaporized first by a vaporizing suction means communicating with the checking chamber, and the vaporized substance is cooled and collected by a cooling heat exchanger to eliminate before checking the disturbances due to the vaporizable substance and to thereby assure accurate detection of pinholes.