초록 ▼

The invention herein relates to a method of forming a one-piece can body having a reinforced pressure-resistant can end and/or stacking bead by first forming a generally cup-shaped blank defined by a generally cylindrical body, a radius portion and an end, exerting first forces against the cup-shape

The invention herein relates to a method of forming a one-piece can body having a reinforced pressure-resistant can end and/or stacking bead by first forming a generally cup-shaped blank defined by a generally cylindrical body, a radius portion and an end, exerting first forces against the cup-shaped blank in a first direction to form the end into a concavely outwardly opening end defined by a central end panel, a frusto-conical wall and an annular inwardly opening channel merging with the cylindrical body, and exerting second forces against the annular channel in a second direction opposite the first direction while gripping the central end panel to reform either or both the frusto-conical wall and a part of the annular channel to selectively form one or both of an inwardly projecting outwardly opening annular bead and an outwardly projecting inwardly opening annular bead defining respective reinforcing and stacking beads, and the first and second directions defining a single reciprocal opposing path of force exertion by the first and second forces.

대표청구항 ▼

A method of forming a can having a reinforced can bottom comprising the steps of forming a generally cup-shaped blank defined by a generally elongate cylindrical body, a radius portion and an end, exerting first forces against the blank in a first direction to form the end into a concavely outwardly

A method of forming a can having a reinforced can bottom comprising the steps of forming a generally cup-shaped blank defined by a generally elongate cylindrical body, a radius portion and an end, exerting first forces against the blank in a first direction to form the end into a concavely outwardly opening end defined by a central end panel, a peripheral wall and an annular inwardly opening channel merging with the cylindrical body, exerting second forces against the annular channel in a second direction opposite the first direction to deform a part of the peripheral wall in the absence of restraint out of the plane of the central end panel toward the interior of the can to form an inwardly projecting outwardly opening annular bead, and the first and second directions defining a single reciprocal opposing path of force exertion by the first and second forces.