Method and apparatus for making notched muntin bars having two finishes

摘要

An apparatus for making notched muntin bars. The apparatus includes an uncoiler (48) or support for a supply of ribbon stock (S), a notching device (50), a roll forming machine (52) and a severing device (54). The ribbon stock has a surface with first and second finishes. The notching device (50) receives ribbon stock (S) from the supply of ribbon stock. The notching device (50) includes a punch that is moveable from a first position to a second position. In the first position the punch is activated to remove sections of material having the first finish. In the second position the punch is activated to remove sections of material having the second finish. The roll forming machine (52) receives the ribbon stock from the notching device (50) to form hollow muntin bar stock that has a first side with the first finish and a second side with the second finish.