Title:
LEAK INSPECTION METHOD OF SEALING CONTAINER OR SEALED MEMBER
Document Type and Number:
WIPO Patent Application WO/1989/002588
Kind Code:
A1
Abstract:
When leak from a sealing container or the like is inspected in a fluid atmosphere of a gaseous or liquid phase, a) a pressure difference is generated between the interior of the sealing container or the like and the atmospheric fluid to provide the sealing container with a leak condition, or conversely a suction condition is provided to the sealing container or the like and b) the leak of the contents from the sealing container or the inflow of a fluid into the sealing container is monitored by a Schlieren method or optical interferometry. The leak condition or suction condition described above is produced by any one or a combination of more than one of the following methods: i) introduction of pressurized gas into the sealing container; ii) compression of the sealed member from outside; iii) pressure reduction of atmospheric fluid below internal pressure of sealed member; iv) leaving the sealed member in pressurized fluid for a predetermined time to cause inflow of the pressurized fluid into the sealed member and thereafter bringing it back to the atmospheric fluid having lower pressure than the internal pressure of the sealed member; v) elevation of pressure of atmospheric fluid pressure above the internal pressure of the sealed member; vi) heating of the sealed member from outside to elevate its internal pressure; vii) application of electromagnetic wave or ultrasonic wave to the sealed member to heat the container or/and the contents and to elevate the internal pressure.
Inventors:
Shiraiwa
Kazuo, Tada
Kunio, Ichimura
Youji
Kazuo, Tada
Kunio, Ichimura
Youji
Application Number:
PCT/JP1988/000899
Publication Date:
March 23, 1989
Filing Date:
September 07, 1988
Export Citation:
Assignee:
Shiraiwa
Kazuo, Tada
Kunio, Ichimura
Youji
Kazuo, Tada
Kunio, Ichimura
Youji
International Classes:
G01M3/36; G01M3/38; (IPC1-7): G01M3/38
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