Abstract: A heat exchanger of a type with a collector plate which has a wall in which are formed rim holes which can receive the ends of tubes of a bundle, wherein the wall of the collector plate is designed such that, for the purpose of a soldered or welded connection to the tubes, it forms collars around the rim holes, and wherein the wall has a front side facing toward the tube bundle and a rear side facing toward the collecting tank. Each collar extends in the direction of the collecting tank from a straight base plane on the rear side of the wall.

Abstract: A heat exchanger of a type with a collector plate which has a wall in which are formed rim holes which can receive the ends of tubes of a bundle, wherein the wall of the collector plate is designed such that, for the purpose of a soldered or welded connection to the tubes, it forms collars around the rim holes, and wherein the wall has a front side facing toward the tube bundle and a rear side facing toward the collecting tank. Each collar extends in the direction of the collecting tank from a straight base plane on the rear side of the wall.

Abstract: The invention relates to a box for receiving a coolant for a heat exchanger (1) used for motor vehicles. Said box comprises two sidewalls (22, 24 and 22a, 24a), two end walls (26, 28 and 26a, 28a), a cover (18 and 18a), and a bottom (20 and 20a) which is located opposite the cover (18 and 18a) and is provided with one or several openings (60) for receiving tubes, particularly connecting tubes, such as flat tubes. The cover (18 and 18a) is provided with at least one recess (90, 92, 94) into which reaches at least one extending wall (26, 26a, 28, 28a, 32).