Patent ID: 9016980
Filing Date: 2015-04-28
Classification: B08B,B09C,B65D,B65G,E02D,E04H,E21B

Abstract:
1. An apparatus for containing a liquid, comprising: a base comprising a bottom surface, a top surface, and a groove disposed in the top surface; and a key block comprising a top having a plurality of edges and a bottom, wherein the bottom of the key block has a polygonal shape, wherein the key block is shaped to fit in the groove in such a way as to create tension in a sheet material positioned between the base and the key block such that the base and the key block hold the sheet material in place when a force parallel to the bottom surface is applied to the sheet material, and wherein the edges of the top of the key block are substantially flush with the top surface of the base when the key block is placed in the groove such that the base and the key block hold the sheet material in place when the force parallel to the bottom surface is applied to the sheet material.