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A cooling apparatus includes first and second laminations each having a plurality of openings wherein the openings of the first and second laminations are substantially coincident when the laminations are disposed in identical orientations and the first lamination is aligned with and overlies the se

A cooling apparatus includes first and second laminations each having a plurality of openings wherein the openings of the first and second laminations are substantially coincident when the laminations are disposed in identical orientations and the first lamination is aligned with and overlies the second lamination. The first and second laminations are bonded in a stacked and aligned relationship in different orientations such that passages are formed extending through the laminations.

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[ What is claimed is:] [1.] Cooling apparatus, comprising:first and second identical laminations each having a plurality of openings wherein the openings of the first and second laminations are substantially coincident when the laminations are disposed in identical orientations and the first laminat

[ What is claimed is:] [1.] Cooling apparatus, comprising:first and second identical laminations each having a plurality of openings wherein the openings of the first and second laminations are substantially coincident when the laminations are disposed in identical orientations and the first lamination is aligned with and overlies the second lamination and wherein the openings of each lamination are disposed in a regularly spaced pattern which is nonsymmetric with respect to two center lines of the lamination; andmeans for maintaining the first and second laminations in a stacked and aligned relationship and in different orientations wherein passages are formed extending through the laminations;wherein the maintaining means maintains the first lamination in a first orientation and the second lamination in one of second and third orientations different than the first orientation. [15.] Cooling apparatus, comprising:a plurality of substantially identical stacked laminations each lamination being flat and having openings; andmeans for securing the laminations together such that at least one lamination is flipped relative to another lamination to form cooling passages extending through the laminations;wherein each lamination includes first through fourth sides arranged generally in a rectangle and wherein the openings are inclined relative to the four sides;wherein a first lamination is disposed in a first orientation and a second lamination adjacent the first lamination is disposed in a second orientation which is displaced 180 degrees about a central axis extending between the first and third sides of one of the laminations relative to the first orientation; andwherein first through fourth headers are adjacent the first through fourth sides, respectively, and wherein the cooling passages extend between the first and third headers when the second lamination is disposed in the second orientation and wherein the cooling passages extend between the second and fourth headers when the second lamination is disposed in the third orientation. The cooling apparatus of claim 15, wherein the first central axis is perpendicular to the second central axis. The cooling apparatus of claim 15, wherein the cooling passages have one set of flow characteristics when the second lamination is disposed in the second orientation configuration and another set of flow characteristics different than the one set of flow characteristics when the second lamination is disposed in the third orientation configuration. Cooling apparatus, comprising:a plurality of substantially identical stacked laminations each lamination being flat and having openings; and means for securing the laminations together such that at least one lamination is flipped relative to another lamination to form cooling passages extending through the laminations;wherein the openings of each lamination are disposed in a regularly spaced pattern which is nonsymmetric with respect to a center line of the lamination;wherein the openings in the laminations comprise slots;wherein the openings are disposed in rows and columns between headers;wherein each lamination includes four sides arranged generally in a square and wherein the openings are inclined relative to the four sides. A method of assembling cooling apparatus, the method comprising the steps of:providing first and second laminations each having a plurality of slots wherein the slots of the first and second laminations are substantially coincident when the laminations are disposed in identical orientations and the first lamination is aligned with and overlies the second lamination; andsecuring the first and second laminations in a stacked and aligned relationship and in different orientations wherein passages are formed extending through the laminations;wherein each lamination includes first through fourth sides and wherein the step of securing includes the step of maintaining the first lamination in a first orientation and the second lamination in a second orientation which is displaced 180 degrees about a central axis extending between the first and third sides of one of the laminations relative to the first orientation;wherein first through fourth headers are disposed adjacent the first through fourth sides, respectively, of each lamination and wherein the cooling passages extend between the second and fourth headers.