A vertical form fill and seal system for making flat-bottom stand-up bags comprising: a support rod or a spindle that rotatably supports an elongated sheet of material defined by a plurality of material segments (S 1, S 2,..., S n), each of said plurality of material segments including a first aperture and a second aperture formed through said sheet of material; a cylindrical forming tube sized for drawing a left edge (E L) and a right edge (E R) of said elongated sheet of material together in an overlapping configuration to form said elongated sheet of material into a tube shape; a sealer sized for sealing said left edge (E L) and said right edge (E R) of said elongated sheet of material to one another to form said tube shape; a gusseting mechanism sized for forming a gusseted tuck in each of a left sidewall panel portion (SP L) and a right sidewall panel portion (SP R) of said tube shape to form a gusseted tube shape; and a sealing mechanism that folds and seals said first segment (S 1) of said plurality of material segments at said first aperture and at said second aperture to provide an end wall of said first segment (S 1) with a flat, rectangular-shaped footprint; and a cutter operable to sever said first segment (S 1) from a second segment (S 2) located downstream from said first segment, wherein said cutter and said sealing mechanism form a "K" shape integrated machine, and wherein said cutter and said sealing mechanism cooperate to provide a sealed edge at said end wall that has a substantially "U" shape and that has pair of legs (31a, 31b) extending from a cross member that joins said pair of legs (31a, 31b), wherein said legs (31a, 31b) extend from said cross member at an obtuse angle and away from one another. a support rod or a spindle that rotatably supports an elongated sheet of material defined by a plurality of material segments (S 1, S 2,..., S n), each of said plurality of material segments including a first aperture and a second aperture formed through said sheet of material; a cylindrical forming tube sized for drawing a left edge (E L) and a right edge (E R) of said elongated sheet of material together in an overlapping configuration to form said elongated sheet of material into a tube shape; a sealer sized for sealing said left edge (E L) and said right edge (E R) of said elongated sheet of material to one another to form said tube shape; a gusseting mechanism sized for forming a gusseted tuck in each of a left sidewall panel portion (SP L) and a right sidewall panel portion (SP R) of said tube shape to form a gusseted tube shape; and a sealing mechanism that folds and seals said first segment (S 1) of said plurality of material segments at said first aperture and at said second aperture to provide an end wall of said first segment (S 1) with a flat, rectangular-shaped footprint; and a cutter operable to sever said first segment (S 1) from a second segment (S 2) located downstream from said first segment, wherein said cutter and said sealing mechanism form a "K" shape integrated machine, and wherein said cutter and said sealing mechanism cooperate to provide a sealed edge at said end wall that has a substantially "U" shape and that has pair of legs (31a, 31b) extending from a cross member that joins said pair of legs (31a, 31b), wherein said legs (31a, 31b) extend from said cross member at an obtuse angle and away from one another.