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:
Aug. 22, 1989
Filed:
Sep. 26, 1988
Meinrad Rosse, la Tour-de-Peilz, CH;
Marc-Henri Rossier, Epalinges, CH;
Nestec S. A., Vevey, CH;
Abstract
The tightness of sealed packages is monitored by means of a process and an apparatus system which utilize and incorporate a first system section, which includes at least one reservoir and a pressure measuring cell, a second system section, which includes a rigid measuring chamber, and means for adjusting pressure of the system sections via the first system section. The first system section is first pressurized to a predetermined pressure, which may be either above or below atmospheric pressure, and then the first and second system sections are brought into communication for establishing a second pressure for the first and second system sections combined. Major leaks in the sealed packages, absence of a sample in the measuring chamber and leaks in the measuring chamber then may be detected with the aid of the pressure measuring cell. For detecting other than major leaks, the first and second system sections then are isolated and a differential pressure cell detects the pressures of the first and second system sections for a timing sufficient to detect differences in pressure between the first and second system sections for detecting if the package being tested has leaks.