Foam in bag packaging system for manual use
AssigneeSealed Air Corporation
InventorsLaurence Burst Sperry, Anthony Orkin Davlin, George Teofilius Bertram, Charles Paul Kannankeril
Life of this patent
Estimating the term…
Abstract
A foam in bag cushion precursor is disclosed that is particularly useful for manual operation. The cushion precursor comprises a bag formed of two sheets of flexible plastic film material closed on all four side edges; a frangible seal that defines separate interior cells in a portion of the bag; a first foam precursor composition in one of the interior cells; and a second foam precursor composition in another of the interior cells. One of the cells has a nonfrangible seal wall other than one of the side edges for directing the contents of the cell to mix with the contents of the other cell before the mixed contents enter the remaining portion of said bag.
Claims34
A foam in bag cushion precursor that is particularly useful for manual operation, said cushion precursor comprising:
- a flexible bag closed on all of its side edges and defining an interior space to receive foam therein, said bag having at least its inner surfaces formed of a heat sealable plastic material;
- a plurality of seals defining first and second separate interior cells in a portion of said bag, one of said seals being frangible and located between said first and second cells and another of said seals being frangible and located between said second cell and said interior space within said bag while the remainder of said seals are non-frangible, said frangible seals being formed over a pattern of printed release agent in which said agent prevents said plastic material from heat sealing at a printed portion, so that the amount of printed portions in said pattern determines the strength of said frangible seals;
- a first foam precursor composition in said first interior cell;
- a second foam precursor composition in said second interior cell;
- the frangible seal between said first and second cells being adapted for manual rupturing to provide communication between the formerly separate cells and the nonfrangible seals serving for directing the contents of said first cell to mix with the contents of said second cell before the mixed contents enter the remaining portion of said bag;
- and
- means for permitting gases to vent from said bag as the foam precursors form foam.
A foam in bag cushion precursor that is particularly useful for manual operation, said cushion precursor comprising:
- a bag formed of overlying sheets of thermoplastic film material defining a closed interior space therebetween;
- a frangible seal dividing said interior space in said bag into at least two portions, said seal being formed over a pattern of printed release agent in which said agent prevents said thermoplastic film from heat sealing at a printed portion, so that the amount of printed portions in said pattern determines the strength of said frangible seal and said frangible seal being susceptible to manual rupturing;
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- first and second foam precursor compositions in said two portions of said bag which when mixed upon rupture of said frangible seal forms a foamable composition in said bag.
A foam in bag precursor that is particularly useful for manual operation, said cushion precursor comprising:
- a bag formed of two sheets of flexible plastic film material closed on all four side edges and defining an interior space for receipt of foam,
- a plurality of seals dividing said interior space in said bag into respective first, second and third separate cells, said first cell being separated from said second cell by a first frangible seal susceptible to manual rupture and from said third cell by a nonfrangible seal and said second cell being separated from said third cell by a second frangible seal susceptible to rupture by expansion of foam, said frangible seals being formed over a pattern of printed release agent in which said agent prevents said plastic material from heat sealing at a printed portion, so that the amount of printed portions in said pattern determines the strength of said frangible seals;
- a first foam precursor composition in said first cell;
- a second foam precursor composition in said second cell;
- said nonfrangible seal of said first cell directing the first foam precursor composition to mix with the second foam precursor composition in said second cell before the mixed precursor compositions enter said third cell;
- and
- means for permitting gases to vent from said bag as the foam precursors form foam.
A foam in bag cushion precursor that is particularly useful for manual operation, said cushion precursor comprising:
- a bag formed of flexible plastic film material closed on all of its side edges;
- a plurality of interior seals that define four interior cells;
- a first and second of said cells each containing a respective foam precursor;
- a third cell adjacent said first and second cells;
- one frangible seal between said first and third cells and a second frangible seal between said second and third cells for permitting the contents of said first and second cells to mix in said third cell when said frangible seals are broken, said frangible seals being formed over a pattern of printed release agent in which said agent prevents said plastic material from heat sealing at a printed portion, so that the amount of printed portions in said pattern determines the strength of said frangible seals;
- and
- means for permitting gases to vent from said bag as the foam precursors form foam.
Dependencies are inferred from the claim text.