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:
Oct. 21, 1997
Filed:
Nov. 29, 1995
Mathias Leonardus Aarts, Bilthoven, NL;
Sara Lee/DE N.V., Utrecht, NL;
Abstract
Method and apparatus for evacuating a vacuum package made from a thin-walled and flexible packaging material and filled with granular material. An open end of a filled package is folded in such a manner that a narrow gap is formed which constitutes an open communication between an interior and an exterior of the package. At least a part of the package is placed in a vacuum space and vacuumized for removing gasses from the package through the gap. Upon evacuation the package is sealed airtightly. Further, on at least a part of the packaging material defining the gap a force is exerted which reduces the gap width, so that the gap constitutes a filter for the granular material, whereby the granular material is retained inside the package during the evacuation of the package.