B - Operations – Transporting – 23 – K
Patent
B - Operations, Transporting
23
K
13/7
B23K 20/00 (2006.01)
Patent
CA 1236257
14 ABSTRACT OF THE DISCLOSURE A mechanical connection for connecting together a juxtaposed first and second layer of malleable sheet material includes the use of a third layer of malleable sheet material overlying the first and second layers, with the second layer sandwiched between the first and third layers. The first layer has a first displaced pocket projecting away from the second layer, and the second layer has a second displaced pocket nesting within the first displaced pocket. The third layer has an aperture in registry with both pockets, the aperture resulting from the punching out of a disc or slug which is nested within the second displaced pocket. In a preferred embodiment, a length of duct with at least one flat wall has an intermediate lateral stiffener which includes a base leg defined by two juxtaposed layers of sheet metal, the base leg being connected with the flat wall against which it is juxtaposed by the mechanical connection described above.
472882
Ductlok Inc.
Sim & Mcburney
LandOfFree
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