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US 5,326,176 AGranted
Overpressure valve for packaging containers
AssigneeRobert Bosch GmbH
InventorKlaus Domke
Life of this patent
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AssigneeRobert Bosch GmbH
InventorKlaus Domke
Estimating the term…
An overpressure valve for a packaging container, which prevents air from the atmosphere from getting into the package and, in the case of gas-emitting material being packaged, reduces a resultant overpressure by venting gas. The overpressure includes a valve membrane stuck to a wall of the container on top of through holes. The membrane is secured to the wall with peripheral adhesive strips, leaving an adhesive-free zone above the through holes; the adhesive-free zone forms a valve member, and the congruent part of the wall forms a valve seat. The adhesive strips have a wedge shape, so that the transitional regions of the adhesive-free zone toward the adhesive strips, rest on the wall, and the raised peripheral regions form spacers for adjacent packages to permit operation of the overpressure valve while stacked one on the other.
An overpressure valve for packaging containers, said overpressure valve includes a thin, flexible film membrane for disposal on an outer wall of a container to cover at least one hole through a wall of the container for release of any gases within said container, said membrane includes first and second opposite edge sections spaced by a central section, first and second adhesive strips adhering to said first and second edge sections of said membrane and affixed to said outer wall in opposite sides of said at least one hole through said wall with an adhesive-free zone between said adhesive strips which rests upon said outer wall of said container over said at least one hole and which is spaced from said outer wall of said container due to an overpressure in said container, each of said first and second adhesive strips include a thick portion along oppositely disposed edges of said membrane which extend across a width of said membrane with a very thin portion juxtaposed said central section, said first and second adhesive strips having an exposed surface which is in a plane with said central section.
Dependencies are inferred from the claim text.