Flat bottomed container system - uses impervious flexible lining which is displaced by compressed air to drive contents towards discharge opening

摘要

The lower zone of the container where a residue of the product collects is provided with an impervious lining of flexible but resistant material which can deform when compressed air is admitted between the container and the lining. The deformation drives the product towards the discharge opening. The lining has two adjacent parts which are respectively horizontal and vertical and connected by triangular sides forming a prism shaped trough. Provision is made for returning the lining to its original position after admission of air to empty the container.