Patent ID: 8397944

Claim:
A non-collapsible storage/mailing tube comprising: a triangular shaped end cap, said end cap having an interior surface with an internal rib thereon; an elongated member for storing or transporting a document or an item having a closed end and an open end to form an elongated document chamber therein, said elongated member comprising a set of three elongated panels with each of the panels integrally joined at an edge to form a one-piece generally triangular cross section tube that can maintain a nonrolling condition when placed on a support surface, said elongated member and said end cap providing a water resistant housing that can maintain items in a dry condition therein, said elongated member having an exterior surface with said exterior surface of said elongated member smaller than said interior surface of said end cap to enable said end cap to slip over and encompass a circumferential portion of said exterior surface of said elongated member prior to said internal rib of said end cap being brought into frictional engagement with a further portion of the exterior surface of the elongated member to thereby frictionally retain the rigid cap on the first end of said elongated member during handling and transport of the storage/mailing tube, said end cap including at least three peripherally spaced internal ribs for engagement with the exterior surface of the elongated member, each of said internal ribs extending partway along an inside lip of said end cap, each of said internal ribs having a ramped leading edge to facilitate initial engagement with the exterior surface of the elongated member once the end cap is positioned over the open end of said elongated member, each of said at least three peripherally spaced ribs having a leading edge with each of the leading edges set back from a peripheral edge of the inside lip of the end cap to facilitate placing the end cap over an end of the elongated member, each of the three peripherally spaced ribs are located at an apex region of the end cap.