A leak inspection device includes an inspection mechanism that executes a first inspection process for compressing the insides of a first inspection chamber and a reference chamber, and inspecting the first inspection chamber for a pressure leak based on a differential pressure therebetween, and a second inspection process for compressing the insides of a second inspection chamber and the reference chamber, and inspecting the second inspection chamber for a pressure leak based on a differential pressure therebetween, a first pre-compression valve that opens and closes a first pre-compression path, and a control device that opens, during the execution of the first inspection process, the first pre-compression valve to pre-compress the second inspection chamber, and causes, in a state where the inside of the second inspection chamber is pre-compressed, the inspection mechanism to execute the second inspection process.

There is disclosed an improved leak checking method which can accurately test a sealing performance of a substrate holder more than conventional leak check techniques. The leak checking method includes: holding a substrate with a substrate holder, the substrate holder including a first holding member and a second holding member, the second holding member having an opening through which a surface of the substrate is exposed; pressing a sealing projection of the second holding member against the surface of the substrate when holding the substrate with the substrate holder; covering the surface of the substrate, exposed through the opening, and the sealing projection with a sealing cap; forming a hermetic space between the sealing cap and the substrate holder; introducing a pressurized gas into the hermetic space; and detecting a decrease in pressure of the pressurized gas in the hermetic space.

A method for in-line leak testing of blow moulded containers wherein a conveyor line is fed with a continuous stream of blow moulded containers from a blow moulding machine, at least one measuring head is temporarily connected to a first blow moulded container. The measuring head is moved in order to follow the movement of said first blow moulded container which is pressurized by a source of pressurized gas, the source of pressurized gas is disconnected, said at least one measuring head is used to measure the pressure decay therein. The pressure decay is compared with stored data for the pressure decay of acceptable containers and an accept or non-accept signal is generated which implies proceeding or disposal of said first blow moulded container. The measuring head is moved against the moving direction of the conveyor line to a subsequent blow moulded container, and the process is repeated.

A leaking tank testing device, including a main body, a tubing system disposed within at least a portion of the main body to receive contents therein from a tank container, a selector rotatably disposed on an outer surface of the main body to select a vacuum testing mode in a first position, and a pressure testing mode in a second position, a vacuum monitor disposed on at least a portion of the main body to display a gradient in pressure between the contents in the tubing system and an external pressure outside of the main body in response to the selector being moved to the vacuum testing mode, and a seal disposed on at least a portion of the main body to cover at least a portion of the tubing system in response to the selector being moved to the pressure testing mode.

A method and apparatus to ensure proper operation of an air permeable vent on an electronic device by allowing the vent and its surrounding area to be pressure decay leak tested using liquid to create the seal around the air permeable vent. The method may include filling a chamber with a known volume of liquid to cover the vent. Then, a remaining volume of air can be pressurized and monitored to detect a liquid leak either through the vent or through the sealing surface around or between the vent and the substrate of the electronic device. A pressure decay unit may adequately determine a leak rate to determine if the electronic device will pass or fail the required IP rating.

A system includes a source of pressurized fluid, a primary pressure vessel disposed in fluid communication with the source, and a supplemental pressure vessel disposed in fluid communication with the source and in fluid communication with the primary pressure vessel. The primary pressure vessel has a first life expectancy duration and includes a first structural characteristic. The supplemental pressure vessel has a second life expectancy duration shorter than the first life expectancy duration and includes a second structural characteristic. A method uses a supplemental pressure vessel to predict impending failure of a primary pressure vessel. The method includes connecting a primary pressure vessel to a source of pressurized fluid, fluidly connecting a supplemental pressure vessel with the source and with the primary pressure vessel, and exposing the supplemental pressure vessel to a first fatigue load to cause its failure before failure of the primary pressure vessel occurs.

The current invention mitigates the problem of incorrect determinations of leaking packages during vacuum decay leak detection testing. As described in this disclosure, a testing chamber used for vacuum decay leak detection testing is exposed to interferences when not under vacuum or at low pressure conditions between testing cycles. By measuring one or more exposure time intervals immediately preceding a present test cycle, it is possible to improve detection of leaking packages by adjusting raw measured pressure gathered during vacuum decay leak testing based upon the length of exposure times and create corrected pressure data used to improve vacuum decay leak detection.

A leaking tank testing device, including a main body, a tubing system disposed within at least a portion of the main body to receive contents therein from a tank container, a selector rotatably disposed on an outer surface of the main body to select a vacuum testing mode in a first position, and a pressure testing mode in a second position, a vacuum monitor disposed on at least a portion of the main body to display a gradient in pressure between the contents in the tubing system and an external pressure outside of the main body in response to the selector being moved to the vacuum testing mode, and a seal disposed on at least a portion of the main body to cover at least a portion of the tubing system in response to the selector being moved to the pressure testing mode.

A battery case analyzing apparatus includes a sealing portion which covers an injection hole formed on an upper side of a battery case. The sealing portion includes a lower side contacting the upper side of the battery case, a gas injection passage, and a vacuum forming passage formed in the sealing portion. The apparatus includes a gas injection line which is connected to an inlet of the gas injection passage formed on an upper side of the sealing portion, a vacuum forming line which is connected to an outlet of the vacuum forming passage formed on the upper side of the sealing portion, a gas supply portion configured to inject gas into the battery case through the gas injection line, and a vacuum pump which is connected to the vacuum forming line to form a vacuum in a vacuum forming groove formed on the lower side of the sealing portion.

A leaking tank testing device, including a main body, a tubing system, including a main tube disposed within at least a portion of the main body, and an intake tube connected at a first end to the main tube to receive contents from a tank container, and a selector rotatably disposed on an outer surface of the main body to select a current mode of operation to compare a current pressure level of the tank container with a predetermined pressure level for normal operation.