Method for testing containers, use of the method, and a testing device
OwnerMartin Lehmanninventor
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Abstract
A method and device for testing containers, the method calling for a difference in pressure to be generated between the pressure inside the container and the pressure immediately surrounding the container, the behavior of one of these pressures permitting the gas tightness of the container to be assessed. A pressure value is stored and subsequently compared with one of the pressures, the stored pressure value being stored electronically and compared with at least one value of the output signal from a pressure sensor. The container is housed in an enclosure which is connected to a pressure or suction line, and a pressure-value storage unit, a comparator unit and a pressure sensor are associated with the pressure or suction line.
Claims13
A method for manufacturing a tight container comprising:
- constructing a container;
- establishing a differential pressure between a first pressure in the interior of said container and a second pressure in the vicinity of said container;
- monitoring at least one of said first and second pressures and generating an electrical monitoring output signal;
- storing said electrical output signal at a first moment to generate a stored signal;
- comparing said electrical output signal at a second deferred moment with said stored signal and concluding from a result signal of said comparing, whether said container is tight or not;
- further comparing said stored signal with said electric output signal at essentially the same time as said first moment, the result signal of said further comparing being exploited as a zero offset signal.
Dependencies are inferred from the claim text.