Abstract: A heat exchanger and a method of manufacturing a heat exchanger are described and shown. In some embodiments, the heat exchanger has a brazed core with flat metal tubes and flat metal tube ends received in corresponding openings defined in a collecting tank, and has a plurality of adhesive connections each with an annular space around a flat tube end and defined at least in part by the collecting tank, an addition-crosslinking silicone adhesive located within the annular space, and a mounting plate at least partially closing each annular space.

Abstract: The invention provides for a manufacturing process of a heat exchanger having a flat tube and fin core. The flat tube and fin core is formed in such a way that free flat tube ends are provided, wherein the flat tube and fin core is brazed in a brazing furnace, and wherein the flat tube ends are received in receptacle openings of a mounting plate and a header forming an enclosed space for receiving a bonding agent for coupling the flat tube ends to the header and mounting plate.

Abstract: A method of making an absorbent granulate of paper, with or without additives, includes mechanically comminuting paper into irregular and/or strip-shaped fragments, crumpling and interlacing the fragments with attendant development of internal spaces (cavities) in the interlaced and crumpled fragments, rough pressing the interlaced and crumpled fragments into prepressed formations (e.g., into tubes having a diameter of up to or even in excess of 10 mm), and converting the prepresssed formations into particles, particularly into granules or pellets. The crumpling and interlacing step can include agitating the fragments in one or more streams of a gaseous fluid and/or kneading the fragments.