Duct finishing machine

Claim 2

A duct finishing machine which comprises: (a) a duct holding frame that engages and holds a duct in a proper position; (b) a power head carriage that includes means for pivotally attaching and locking the carriage to the duct holding frame; and (c) a power head that moves along the power head carriage travelling an entire length of the duct for sealing a formed lock seam of the duct by rolling a flange down tight.

Claim 3

A duct finishing machine as recited in claim 1, wherein the duct holding frame comprises: (a) a rear horizontal base member that sits on a flat surface; (b) a front horizontal member that sits on the flat surface; (c) a rear vertical leg member attached at bottom to right side of the rear horizontal base member; (d) a front vertical leg member attached at bottom to right side of the front horizontal base member; (e) a horizontal foot member attached at right angle to left side of the front horizontal base member; (f) a pair of horizontal frame members attached between the rear vertical leg member and the front vertical leg member; (g) a horizontal duct holding arm member attached at right side to top of the front vertical leg member; (h) a horizontal duct support arm member that slideably mates at right angles with the pair of horizontal frame arm members to provide vertical adjustment to accomodate different duct sizes; and (i) a pair of female hinge portions affixed to the front vertical leg member comprising part of said means.

Claim 4

A duct finishing machine as recited in claim 2, wherein the power head carriage comprises: (a) a horizontal power head carriage track member; (b) a first vertical leg member affixed downwardly to right side of the horizontal power head carriage track member; (c) a pair of male hinge portions affixed to the first vertical leg member to engage with the said pair of female hinge portions that are on the duct holding frame; (d) a second vertical leg member affixed downwardly to left side of the horizontal power head carriage track member; (e) a ball bearing roller affixed to bottom of the second vertical leg member to move along the flat surface and engage with the horizontal foot member on the duct holding frame; and (f) a clamping device pivotly affixed to left side of the horizontal power head carriage track member that attaches and locks to left side of the horizontal duct holding arm member of the duct holding frame.

Claim 5

A duct finishing machine as recited in claim 3, wherein the power head comprises: (a) an L-shaped frame having a vertical arm and a horizontal arm; (b) a motor attached to vertical arm of the frame; (c) reduction gears driven by the motor; (d) a shaft connected to the reduction gears; (e) a main sprocket driven by the shaft; (f) a plurality of roller die assemblies, each roller die assembly attached to the horizontal arm of the frame; (g) a plurality of idler wheels each idler wheel attached to the horizontal arm of the frame between two roller die assemblies; (h) a continuous chain rotatably attached between the main sprocket, the plurality of roller die assemblies and the plurality of idler wheels to drive the roller die assemblies that engage the flange of the duct; (i) a plurality of ball bearing roller assemblies attached to bottom of the horizontal arm of the frame that ride in the horizontal power head carriage track of the power head carriage; and (j) a cover attached to the horizontal arm and vertical arm of the frame.

Claim 6

A duct finishing machine as recited in claim 4, wherein each roller die assembly comprises: (a) a pair of ball bearing housings spaced apart and attached to the horizontal arm of the frame; (b) a shaft rotatably attached to the pair of ball bearing housings whereby one end of the shaft extends outwardly; (c) a sprocket attached to the shaft between the pair of ball bearing housing that engages the chain; and (d) a roller die attached to the end of the shaft to engage the flange of the duct.

Claim 7

A duct finishing machine as recited in claim 5, wherein the power head further comprises an odometer attached to an extension of the shaft connected to the reduction gears with the odometer mounted through the cover in front so that a user of the duct finishing machine can measure lengths of ducts.