Patent ID: 7896065

Claim:
A charge-air cooler for motor vehicles comprising: a heat exchanger unit that includes tubes having tube ends and fins arranged between the tubes, and a first header box arranged on one side of the tubes, wherein the first header box is configured to introduce a medium into the charge-air cooler, and a second header box arranged on another side of the tube, wherein the second head box is configured to discharge the medium from the charge-air cooler, wherein each header box has a bottom with openings for receiving the tube ends, a cover and an inlet or outlet connecting pipe, wherein the header boxes are at least partially produced by internal high-pressure forming (IHF) of a metallic semifinished product, wherein each header box includes a longitudinal bead that extends along at least a long axis of the at least one header box, wherein the longitudinal bead of the first header box is configured such that a cross section of the first header box decreases as a distance from the inlet connecting pipe of the first header box increases, wherein the longitudinal bead of the second header box is configured such that a cross section of the second header box increases as a distance to the outlet connecting pipe of the second header box decreases.