Patent attributes
An apparatus for forming a thin wall sheet with first and second edge portions into a shell with a predetermined body configuration and a lockseam in which the edge portions are folded over each other. The apparatus includes a mandrel, a means for at least partially wrapping the sheet around the mandrel into the predetermined body configuration, and a number of gathering bars for engaging the sheet to configure the first and second edge portions according to a predetermined design. The apparatus also includes a number of forming bars for forming the first and second edge portions into respective preselected shapes extending above the top side of the mandrel, and a number of lockseaming rollers for folding the first and second edge portions over each other to form the lockseam.
