Patent ID: 7244221

Claim:
An apparatus for pressforming a paperboard sheet into an articulable pressformed container, the apparatus comprising: a pair of male and female, matingly engagable dies having interfacing forming surfaces in the shape of a container for engaging the paperboard sheet, at least a first one of said dies having a plurality of ridges extending from the forming surface and the second of said dies having a plurality of grooves within the forming surface, the grooves registering with the ridges when the dies matingly engage for forming fold creases in the paperboard sheet, wherein the mating forming surfaces of the dies are oriented obliquely to an intended direction of movement toward each other and wherein at least one of the grooves of the second die is bounded, in an operable position of the dies, by an outermost edge closer to the first die and an innermost edge further from the first die, the outermost edge being recessed an amount sufficient to avoid interference with the ridge of the first die when the dies are moved into mating engagement on opposite sides of the paperboard sheet.