The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 09, 1993
Filed:
May. 15, 1992
Mathias L Aarts, Bilthoven, NL;
Sara Lee/DE N.V., , US;
Abstract
Method and apparatus for leak-testing a filled and closed flexible package, in which the package is placed on a vertically movable support member and is compressed between the support member and a pressure member bearing on the top of the package as a result of relative movement of these members towards each other. The change in the pressure is measured for a fixed measuring time and from this the presence or absence of a leak is determined. The support member supports the package, substantially completely filled with a liquid product, by means of springs. The package is compressed by lowering the pressure member onto the package, the support member thereby being pressed downwards against the spring force acting on the support member. For a fixed measuring time, the change in the spring force is measured for determining possible leakage of liquid from the compressed package.