Patent ID: 8683841

Claim:
An apparatus to cut holes, rectangles, and irregular shapes into round duct and spiral duct and attaching structures, the apparatus comprising: a machine having an electronics cabinet mounted in a machine base, a round duct and spiral duct support bed, a multiple jaw chuck, a rotary servomotor and a gear reducer that turns the round and spiral duct as the cuts are made, a linear motion carriage that carries a plasma cutting torch over the round duct and spiral duct, and a computer control, operatively connected to cut holes, rectangles, and irregular shapes into the round duct; the computer controls all mechanical and electrical functions to cut holes, rectangles and irregular shapes into the round duct; a computer program used to describe the entries of the complete description of the spiral duct with holes, rectangles, irregular shapes, and attaching structures to be cut; a three dimensional view; secondary modification including end trim, miter, tap connection, holes, slots and shapes for branches and registers to attach; wherein a work piece is supported on adjustable tubular rollers along substantially the entire length of the work piece; and wherein software has allowances to produce notches of various shapes and angles to the patterns and shapes that are generated by the computer software for easier forming of the resized shapes and patterns leading to making those connections for mating round or spiral duct and attendant-attaching structure.