Method of making a heat exchanger cross tied pin assembly

Claim 1

THE METHOD OF MAKING PIN FIN MATS INCLUDING THE STEPS OF FORMING AN ASSEMBLAGE OF PINS BY WELDING A PLURALITY OF RELATIVELY RIGID PINS IN PARALLEL CLOSELY SPACED SIDE BY SIDE RELATION TO EACH OTHER IN A ROW TO A FIRST CROSS TIE MEMBER AT ONE FACE OF THE ROW NEAR ONE EDGE OF THE ROW AND EXTENDING LENGTHWISE OF THE ROW AND OUTWARDLY FROM THE PLANE OF SAID ONE FACE, THE SPACING OF THE PINS AND CROSS SECTION OF THE CROSS TIE MEMBER BEING PRESELECTED SO THAT THE CROSS TIE MEMBER IS HIGHLY RESISTANT TO FLEXURE ABOUT AXES PARALLEL TO THE AXES OF THE PINS WHEN IT IS WELDED TO THE PINS, SUPPORTING A SECOND CROSS TIE MEMBER INTO POSITION FOR RESISTANCE WELDING TO THE PINS OF THE ASSEMBLAGE, DISPOSING THE ASSEMBLAGE WITH ITS OTHER FACE TOWARD THE SECOND CROSS TIE MEMBER, WITH THE FIRST CROSS TIE MEMBER EXTENDING GENERALLY PARALLEL TO THE SECOND CROSS TIE MEMBER, AND WITH ITS PINS FREE NEAR THEIR FREE ENDS AND IN POSITION FOR WELDING TO THE SECOND CROSS TIE MEMBER, EFFECTING RELATIVE PASSAGE OF THE ASSEMBLAGE AND CROSS TIE MEMBERS CONCURRENTLY ENDWISE OF THE ROW OF PINS THROUGH A RESISTANCE WELDING STATION AND, AT SAID STATION, APPLYING WELDING CURRENT TO THE PINS AND THE SECOND CROSS TIE MEMBER AND PRESSING THE PINS PROGRESSIVELY, SUCCESSIVELY ALONG THE ROW AS THEY PASS SAID STATION, TOWARD AND EMBEDDING THEM NEAR THEIR FREE ENDS INTO THE SECOND CROSS TIE MEMBERS, CAUSING ACCOMPANYING TORSIONAL FLEXURE OF THE FIRST CROSS TIE MEMBER, AT THAT PORTION AT AND ADJACENT THE WELDING STATION, ABOUT ITS LONGITUDINAL AXIS RELATIVE TO THAT PORTION WHICH HAS NOT YET REACHED THE WELDING STATION UNTIL THE SURFACE OF THE ASSEMBLAGE FACING TOWARD THE SECOND CROSS TIE MEMBER IS GENERALLY PARALLEL TO THE PLANE OF THE SURFACE DEFINED BY THE PINS WHICH HAVE ALREADY BEEN WELDED TO BOTH OF THE CROSS TIE MEMBERS.

Claim 2

THE METHOD OF MAKING PIN FIN MATS INCLUDING THE STEPS OF FORMING AN ASSEMBLAGE OF PINS BY WELDING A PLURALITY OF RELATIVELY RIGID PINS IN PARALLEL CLOSELY SPACED SIDE BY SIDE RELATION TO EACH OTHER IN A ROW TO A FIRST CROSS TIE MEMBER AT ONE FACE OF THE ROW NEAR ONE EDGE OF THE ROW AND EXTENDING LENGTHWISE OF THE ROW AND OUTWARDLY FROM THE PLANE OF SAID ONE FACE, THE SPACING OF THE PINS AND CROSS SECTION OF THE CROSS TIE MEMBER BEING PRESELECTED SO THAT THE CROSS TIE MEMBER IS HIGHLY RESISTANT TO FLEXURE ABOUT AXES PARALLEL TO THE AXES OF THE PINS WHEN IT IS WELDED TO THE PINS, SUPPORTING A SECOND CROSS TIE MEMBER INTO POSITION FOR RESISTANCE WELDING TO THE PINS OF THE ASSEMBLAGE, DISPOSING THE ASSEMBLAGE WITH ITS OTHER FACE TOWARD THE SECOND CROSS TIE MEMBER, WITH THE FIRST CROSS TIE MEMBER EXTENDING GENERALLY PARALLEL TO THE SECOND CROSS TIE MEMBER, AND WITH ITS PINS FREE NEAR THEIR FREE ENDS AND IN POSITION FOR WELDING TO THE SECOND CROSS TIE MEMBER, EFFECTING RELATIVE PASSAGE OF THE ASSEMBLAGE AND CROSS TIE MEMBERS CONCURRENTLY ENDWISE OF THE ROW OF PINS THROUGH A RESISTANCE WELDING STATION AND, AT SAID STATION, APPLYING WELDING CURRENT TO THE PINS AND THE SECOND CROSS TIE MEMBER AND PRESSING THE PINS PROGRESSIVELY, SUCCESSIVELY ALONG THE ROW AS THEY PASS SAID STATION, TOWARD AND EMBEDDING THEM NEAR THEIR FREE ENDS INTO THE SECOND CROSS TIE MEMBERS, CAUSING ACCOMPANYING TORSIONAL FLEXURE OF THE FIRST CROSS TIE MEMBER, AT THAT PORTION AT AND ADJACENT THE WELDING STATION, ABOUT ITS LONGITUDINAL AXIS RELATIVE TO THAT PORTION WHICH HAS NOT YET REACHED THE WELDING STATION UNTIL THE SURFACE OF THE ASSEMBLAGE FACING TOWARD THE SECOND CROSS TIE MEMBER IS GENERALLY PARALLEL TO THE PLANE OF THE SURFACE DEFINED BY THE PINS WHICH HAVE ALREADY BEEN WELDED TO BOTH OF THE CROSS TIE MEMBERS.