Foam in bag packaging system

A foam in place packaging system comprising:

• a first bag formed of two sheets of a first flexible plastic film material closed on all four side edges;
• a second bag within said first bag, said second bag being formed of two sheets of a second plastic film material closed on all four side edges, with those edges of said second bag that are not coincident with one of said edges of said first bag being frangibly sealed edges;
• at least one frangible seal that divides said second bag into two cells;
• a first foam precursor in one of said cells;
• a second foam precursor in the other of said cells;
• and
• means for permitting gases to vent from said first bag as said foam precursors form foam, while preventing foam or foamprecursors from escaping from said first bag;
• whereby when said frangible seals are entirely broken said first and second bags thereby form a single interior cell in which said first and second foam precursors can mix thoroughly and react entirely to eliminate precursor residue and permit the resulting foam to expand properly and flow freely within the resulting single interior cell of said bag.

A foam in place packaging system comprising:

• a first bag formed of two sheets of a first flexible plastic film material closed on all four side edges;
• a second bag adjacent said first bag, said second bag being formed of two sheets of a second plastic film material closed on all four side edges, one edge of said second bag being joined to one edge of said first bag;
• a frangible seal between said first and second bags;
• at least one frangible seal that divides said second bag into two cells;
• a first foam precursor in one of said cells;
• a second foam precursor in the other of said cells;
• and
• means for permitting gases to vent from said first bag as said foam precursors form foam, while preventing foam or foam precursors from escaping from said first bag;
• whereby when said frangible seals are entirely broken said first and second bags thereby form a single interior cell in which said first and second foam precursors can mix thoroughly and react entirely to eliminate precursor residue and permit the resulting foam to expand properly and flow freely within the resulting single interior cell of said bag.