Patent ID: 9359133
Filing Date: 2016-06-07
CPC Classification: B21D,B65D,Y10T

Claim Text:
1. A method of constructing a tank, the tank comprising a body portion with a base, side walls, end walls, and at least one opening having edges, including the steps of: (a) folding a single sheet of material to form the base and side walls of the tank; (b) securing the end walls to the base and the side walls, wherein securing the end walls to base and the side walls forms a fluid-tight seal so that liquid or gas inside the tank cannot pass between the respective walls to exit the tank; (c) forming flanges which extend across the base and define a portion of the at least one opening; (d) inserting a single section of material into the body portion so as to be on the inside of the tank, wherein the single section of material has larger dimensions than the opening; (e) positioning the single section of material to overlap the flanges; and (f) securing the single section of material to the body portion so that the single section of material acts as a barrier to material entering into or exiting from the tank via the at least one opening, wherein securing the single section of material to the body portion forms a fluid-tight seal so that liquid or gas inside the tank cannot pass between the single section of material and the body portion to exit the tank, wherein the step of forming the flanges involves folding the flanges from the same sheet of material as the side walls and the base to create side wall flanges which extend across the base, the ends walls are made from a separate sheet(s) of material to the side walls and base, and the step of forming the end wall flanges also forms projecting edges for the end wall flanges; and further including: the step of folding the separate sheet(s) to create end wall flanges on the end walls that extend across the base; and step of securing a cross member to the flanges and the step of securing baffles to internal surfaces of the flanges, wherein collectively the cross member and the flanges define edges of the at least one opening, wherein the cross member and the flanges together define four openings.