| 摘要 |
A method and apparatus for leak testing moulded plastic containers in which the containers are conveyed seriatim along a linear path. Each successive container is pressurized at a first station along the path and then sealed to maintain pressurization while being disconnected from the source of pressure. A test station is provided a distance downstream along the path from the first station selected to allow pressure in the container to stabilize if there is no leak. At the test station, the pressure in each successive container is momentarily determined and a signal is provided if a container is determined to be leaking. The apparatus includes battery-powered test heads that are brought into engagement with successive containers at the first station and momentarily energized by an optical transmitter when a pressure reading is to be taken, so that battery power is conserved.
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