Patent ID: 6557389
Filing Date: 2003-05-06
Classification: B21D

Abstract:
A machine for corrugating a metal foil strip, comprisinga form gear having equally spaced-apart identical teeth defining a multiplicity of identical cavities along the circumference of the form gear, a rotary drive rotating the form gear intermittently to index successive cavities to a forming station along the perimeter of the form gear where a corrugation is at least partly formed in a cavity then at the forming station while the rotary drive dwells, and a punch unit located at the forming station, the punch unit having a form tooth receivable seriatim in the cavities of the form gear and adapted thereby to at least partly form corrugations in the foil strip, and a reciprocating linear actuator driving the form tooth radially of the form gear intermittently in a succession of forming cycles, each of the forming cycles including a forming stroke in which the form tooth moves into a cavity then at the forming station, a return stroke in which the form tooth moves out of the cavity then at the forming station, and a dwell period in which the form tooth dwells while the form gear indexes.