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US2004112005A1
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Quick change metal stud to hemmed track roll forming system
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Method of attaching a connector element to a duct flange
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Rotatable head assembly for sheet metal coil straightener device
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Companion duct flanges
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Method of inserting corner members in channel-shaped flanges of a duct
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Apparatus and method for inserting angle plates in channel shaped flanges of a duct
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Sheet metal duct construction providing preliminary support for corner crimping
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Deflection-resistant safety flange for integrally-flanged duct sections
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Rollformer for variable width edge profiles
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Pittsburgh seam closer having single seaming roll
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Sheet metal duct system having integral transverse flanges
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Side access cleat former apparatus and method of use
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Insulation blanket shearing and applying machine for ductwork and the like
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Rotary slitting shear having separately powered cutters
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Machine for roll forming variable width profiles
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CA949815A
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Double-spindled elevating multi-station roll former machine and power drive therefor
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Roll machine for alternate cleat forming
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CA964184A
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Combined slitting and overlaying feed apparatus for roll former machines and the like
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Double-spindled elevating multi-station roll former machine and power drive therefor
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US3718022A
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Combined slitting and overlaying feed apparatus for roll former machines and the like
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