Patent ID: 7080540
Filing Date: 2006-07-25
Classification: B21D,F28F

Abstract:
1. A device for forming heat exchange elements having corrugated heat exchange surfaces from a sheet of formable material, comprising: a first part having two spaced apart plates having a corrugated surface profile; and a second part having two plates that are spaced apart by the same distance as are the plates of said first part and that also have said corrugated surface profile, wherein said first and second parts are movable into and out of a sheet corrugation-forming position in which said sheet is disposed in a space provided between two of said corrugated surface profiles of opposing ones of said plates of said first and second parts for having a sheet corrugation formed in said sheet, wherein said plates have substantially the same thickness, wherein the sheet, when provided with said sheet corrugation, has a substantially uniform thickness along its corrugation, and wherein a distance between two opposing corrugated surface profiles of said plates in said sheet corrugation-forming position is constant in a direction of a thickness of the sheet along the corrugations thereof and is greater than such thickness of the sheet by an amount that allows for the presence of a film of lubricant between the sheet and said opposing corrugated surface profiles.