Patent ID: 7104104

Claim:
A method of forming flanged connectors for interconnecting adjacent ends of ducting for use in a heating, ventilating and air conditioning system, the ducting being of a rectilinear cross-section, the flanged connectors having an insertion section and a mating flange section, the method comprising: (a) notching the length of strip material to remove portions of the strip material corresponding to the insertion section and corresponding to the mating flange section, thereby to define the corners of the flanged connector; (b) forming the strip material into a desired cross-sectional shape, said cross-sectional shape comprising the insertion section to engage within or over an adjacent end portion of a ducting section and the mating flange section disposed substantially perpendicular to the insertion section for mating with the mating flange section of a corresponding flanged connector; (c) bending the formed strip material at the notches to define a rectilinear shape corresponding to the cross-sectional shape of the ducting to be interconnected wherein the mating flange portion extending continuously around the insertion section; and (d) affixing the end portions of the bent and formed strip stock together to form a closed rectilinear-shaped flanged connector corresponding to the cross-sectional shape of the ducting to be interconnected.