Abstract: A method of forming slots in a sheet of material having a cladding layer on at least one surface is disclosed. The method includes the step of pre-forming the material by forming depressions in the sheet. Each of the depressions has a bottom wall having the approximate dimensions of a desired slot. Each of the depressions also has sidewalls with the cladding thereon. The sidewalls extend from the bottom wall to the sheet which has not be pre-formed. The method also includes the step of removing the entire bottom wall of the depressions in a piercing operation, forming a slot in the sheet where the bottom wall was, and leaving the slot with substantially clad sidewalls.

Abstract: A heat exchanger includes a pair of manifolds, each of which has a plurality of axially spaced oblong slots, and each of which has at least two detents formed therein. A plurality of generally flat tubes extends between the manifolds and individually through the slots for providing fluid communication between the manifolds. A plurality of radiation fins extends between adjacent flat tubes. A plurality of brackets is provided for mounting the heat exchanger. Each of the brackets comprises a first member and a second member, and each of the first member and the second member including a curved portion and a flange portion. Each curved portion extends circumferentially around a portion of manifold and captures the manifold therein. Each curved portion has at least one protrusion which extends into one of the detents in the manifold. The flange portion connected to the curved portion.

Abstract: A heat exchanger includes a pair of manifolds, each of which has a plurality of axially spaced oblong slots, and each of which has at least two detents formed therein. A plurality of generally flat tubes extends between the manifolds and individually through the slots for providing fluid communication between the manifolds. A plurality of radiation fins extends between adjacent flat tubes. A plurality of brackets is provided for mounting the heat exchanger. Each of the brackets has a curved portion, a flange portion and a mounting portion. The curved portion extends circumferentially around a portion of the manifold. The curved portion has opposite ends and has means located midway between the ends for allowing the ends of the curved portion to move resiliently relative to each other to widen the distance between the ends. The curved portion also has at least one protrusion adjacent to each end. Each of the protrusions extends into one of the detents in the manifold.

Abstract: A heat exchanger includes a pair of manifolds, each of which has a plurality of axially spaced oblong slots. A plurality of generally flat tubes extends between the manifolds and individually through the slots for providing fluid communication between the manifolds. A plurality of radiation fins extends between adjacent flat tubes. At least one of the manifolds comprises a single formed rectangular sheet member having a seam formed from connection portions on each side edge of the sheet member. Each of the side edge connection portions includes an interlocking formation of tabs and recesses, at least some of the tabs deformed as the side edge connection portions engage each other in the circumferential direction. The interlocking formation provides an interconnection which is easier to form and after brazing less subject to burst when under pressure. End caps are provided on each end of the manifold, which include a concave shape which assists in holding the end caps in place when the manifold is pressurized.

Abstract: A device for encasing coins in protective envelopes embodying a generally rectangularly contoured housing elevated at one end and stepped down intermediate its ends to provide a flat work surface offsetedly spaced below the elevated end, with insulation flatly superposed on the work surface thereof and heating coils embedded therein and encircling a centrally disposed coin receiving area. A generally rectangular forming member pivotally mounted to the elevated housing end and overlying and elevatable relative to the work surface.