US Patent 10442589 Integrated one-way valve with polyol film
Patent 10442589 was granted and assigned to Sonoco on October, 2019 by the United States Patent and Trademark Office.
All edits
A one-way valve integrated into a lamination of the kind used as a membrane seal for coffee containers and the like. The valve comprises a top layer, a substrate and a fluid polyol film. The top layer and the substrate are adhered together by an adhesive disposed between the top layer and the substrate. The adhesive defines a boundary of a valve chamber in which the top layer and the substrate are not permanently adhered to each other. The film enhances the adhesiveness of the top layer to the substrate in the area of the valve chamber so that gas inside the container does not escape until the internal pressure reaches a minimum value.
US Patent 10442589 Integrated one-way valve with polyol film
Find more entities like US Patent 10442589 Integrated one-way valve with polyol film
