Patent ID: 8733589

Claim:
A polymer storage apparatus comprising: a sealable container having an exterior, a polyethylene lining, and a chamber containing polymer in liquid form under pressure, said container being capable of being pressurized by compressed gas and having both an inlet for said compressed gas and a separate outlet for said polymer, at least one line marker being provided on said exterior of the container; an outer frame having a base and vertically extending side walls connected to said base, said container being mounted in and supported by said frame both for transport purposes and for use of the apparatus at a polymer using facility; a coil spring mechanism mounted on said base of the frame for supporting said container on said base in a vertically movable manner so that the vertical position of said container and said at least one marker relative to said frame is dependent on an amount of said polymer in said container; and a fill level indicator provided on said frame corresponding to a location of said at least one line marker on the exterior of the container, said line marker being visible through said fill level indicator and moving relative to the fill level indicator on the frame in dependence on the amount of said polymer in liquid form in said container.