| 摘要 |
<p>Provided is a pinhole inspecting method for suitably inspecting a pinhole in a bottle compared with conventional pinhole inspection. A reference inner pressure (P 1 ) is a bottle inner pressure obtained directly after closing a supply valve (3) after opening the supply valve (3) for only a predetermined time. Whether the reference inner pressure (P 1) is over a previously specified first threshold value (P th1 ) or not is checked, and when it exceeds the first threshold value (P th1 ), airtight status of the bottle is held for a predetermined time, and then a pressure reduction quantity (”P) of the bottle inner pressure from the reference inner pressure is measured after a fixed time. The bottle is judged to have no pinholes only when the value of ”P is not exceeding the previously specified second threshold value (”P th2 ).</p> |
