Hoffman Neopac Ag

Jan Wuthrich

Andreas Geiger

A collapsible container is provided with a one-way valve. The valve comprises a cupola shaped slitted membrane forming a closure head to allow dispensing a liquid contained in the container by opening the membrane under liquid pressure. When pressure is reduced the membrane will close and prevent the entrance of air into the container. To avoid a deformation of the membrane in counter dispensing direction a supporting column is arranged within the valve ending in a distance from the lower side of the membrane. This column will prevent an opening of the membrane closure head towards the container storage room when air pressure in direction into the container is too high to be borne by the membrane closure head alone.

Growing community of inventors

Port, Switzerland

Jan Wuthrich