Flat-bottom stand-up bag, vertical form, fill, and seal system and methodology for utilizing the same
A vertical form fill and seal system supports a sheet of material having material segments and a tube sized for drawing edges of the elongated sheet of material together in an overlapping configuration to form the sheet into a substantially tube shape. The VFFS also includes a sealer that seals the edges of the material to one another and a gusseting mechanism sized for forming a gusseted tuck in each of a left panel portion of the material and a right panel portion of the material. A cutting mechanism removes a first portion and a second portion of a first segment of the material segments in order to form a first cut and a second cut in the first segment and a sealing mechanism folds and seals the first segment at the first cut and at the second cut to provide an end wall with a substantially flat, rectangular-shaped footprint.
1. A method comprising:
rotatably supporting an elongated sheet of material defined by a plurality of material segments;
drawing a left edge and a right edge of said elongated sheet of material together in an overlapping configuration around a forming tube to form said elongated sheet of material into a substantially tube shape;
sealing said left edge and said right edge of said elongated sheet of material to one another;
forming a gusseted tuck in each of a left sidewall panel portion of said substantially tube-shaped elongated sheet of material and a right sidewall panel portion of said substantially tube-shaped elongated sheet of material, the left sidewall panel portion and the right sidewall panel portion each extending between a front sidewall panel portion and a rear sidewall panel portion;
removing by a cutting mechanism a first portion and a second portion of a first segment of said plurality of material segments in order to form a first cut and a second cut in said first segment, the first portion removed by the cutting mechanism including a first portion of the front sidewall panel portion and not including any portion of the rear sidewall panel portion, and the second portion removed by the cutting mechanism including a second portion of the front sidewall panel portion and not including any portion of the rear sidewall panel portion; and
folding and sealing by a sealing mechanism said first segment at said first cut and at said second cut to provide an end wall of said first segment with a substantially flat, rectangular-shaped footprint.
2. The method of claim 1 , further comprising severing by said sealing mechanism said first segment from a second segment located downstream from said first segment following formation of said end wall of said at first segment.
3. The method of claim 2 , further comprising severing by said sealing mechanism said first segment at an opposite end of said first segment than said end wall following formation of said end wall to sever said first segment from a third segment located upstream from said first segment.
4. The method of claim 1 , wherein removing said first portion and said second portion includes removing said first portion and said second portion downstream from said forming tube.
5. The method of claim 1 , wherein removing said first portion and said second portion includes removing a substantially triangular shaped piece of material from said sheet of material.
6. The method of claim 1 , wherein said folding and sealing provides a sealed edge at said end wall that has a pair of legs extending from a cross member that joins said pair of legs.
7. The method of claim 6 , wherein providing said sealed edge having said pair of legs and said cross member includes extending said legs from said cross member at an obtuse angle and away from one another.
8. The method of claim 1 , wherein said folding and sealing provides a sealed edge at said end wall that has a substantially “U” shape.