Abstract: A system is provided for cutting and finishing muntins. The system comprises a device for cutting muntins, a device for pinning muntins, and at least one device for punching muntins. The device for cutting muntins comprises a pair of cutting blades that are independently rotatable, translatable and positionable, and indexable, and further comprises means for precisely measuring muntins fed into the apparatus. The device for pinning muntins comprises means for stabilizing a muntin during punching; a guide, which is preferably magnetic; a pin or a blade, which is preferably made of metal; means for punching the pin or blade into a muntin; and means for precisely measuring the location at which a pin or blade is to be punched into a muntin. The at least one device for punching muntins comprises means for stabilizing a muntin strip; means for cutting the muntin strip; and means for translating the means for cutting. Power for the at least one punching apparatus is preferably pneumatic.

Abstract: A system is provided for cutting and finishing muntins. The system comprises a device for cutting muntins, a device for pinning muntins, and at least one device for punching muntins. The device for cutting muntins comprises a pair of cutting blades that are independently rotatable, translatable and positionable, and indexable, and further comprises means for precisely measuring muntins fed into the apparatus. The device for pinning muntins comprises means for stabilizing a muntin during punching; a guide, which is preferably magnetic; a pin or a blade, which is preferably made of metal; means for punching the pin or blade into a muntin; and means for precisely measuring the location at which a pin or blade is to be punched into a muntin. The at least one device for punching muntins comprises means for stabilizing a muntin strip; means for cutting the muntin strip; and means for translating the means for cutting. Power for the at least one punching apparatus is preferably pneumatic.

Abstract: A system and method for machining muntin sections and seating bars for assembly into muntin lattices using machines that notch and crimp the muntin sections and a device that pierces the seating bars. The notching machine has a notching device that forms notches in the muntin section. The crimping machine has a crimping device that forms dimples in a portion of the notched muntin sections. The piercing machine has a piercing device which forms apertures in the seating bar to receive muntin section keepers. The crimped muntin sections are assembled to the non-crimped muntin sections to create the pattern for the lattice with the dimples locking the muntin sections together. The assembled muntin sections are assembled to the seating bars using the keepers to produce an assembled lattice which is inserted between or upon glass panes of a door or window.