Flange extension for externally detachable drum liner

Abstract

A flange fitting for attaching to the lid of a drum includes a seal tube having a generally cylindrical main body with a relatively thin wall arid an outwardly radiating frustoconical lip extension. Also included as part of the flange fitting is a standard drum plug flange having a generally cylindrical main body and an outwardly radiating, frustoconical lip. The drum plug flange is sized and shaped so as to fit within the seal tube such that the lip extension and the lip are generally coextensive with each other. These two components are then able to be anchored into the lid of the drum through a punch press operation which simultaneously clamps and crimps both the lip and lip extension into a raised boss recess thereby precluding any preassembly, such as by welding, of the seal tube and drum flange prior to assembly to the drum lid.

Dependencies are inferred from the claim text.