Method for leak testing and leak testing apparatus

  • US 6,305,215 B2
  • Filed: 02/20/2001
  • Issued: 10/23/2001
  • Est. Priority Date: 05/27/1997
  • Status: Expired due to Term
First Claim
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1. A method for producing a closed and filled container comprising the steps of:

  • filling a container with a material comprising at least one liquid component;

    sealingly closing said container; and

    leak testing said container by;

    applying a pressure difference across at least a part of the wall of the container which part is to be tested by evacuating the surrounding of said container by means of a pumping arrangement;

    lowering said pressure in said surrounding to a value at least according to vapor pressure of said at least one liquid component; and

    monitoring the pressure in said surrounding as a leak indicative signal, thereby performing evacuation of said surrounding by said pumping arrangement at least substantially up to monitoring said pressure as a leak indicative signal.

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