Package making – Methods – With contents treating
Patent
1987-05-07
1988-03-01
Spruill, Robert L.
Package making
Methods
With contents treating
53449, 2064842, 2065248, 220418, 383109, 493217, B65D 3008, B65D 8120
Patent
active
047277068
ABSTRACT:
A sealable package (20) in accordance with this invention includes an inner bag or container (24) located within an outer bag or container (26). The inner bag is formed of a flexible sheet (40) of material resistant to the passage of gas therethrough. The outer bag is formed of a flexible sheet (42) of material. The inner bag is secured to the outer bag along its top (32) and bottom (30) edges and along a vertically oriented back seam (52) by areas (44) of adhesive interposed therebetween. The adhesive areas define passageways (58) therebetween through which air from the ambient atmosphere may flow to enter into the space (28) between the two bags. The inner bag is arranged to be filled with some material (22) and then vacuumized and the top sealed closed. The gas space between the inner bag and outer bag enables the outer bag to provide a smooth, aesthetically pleasing appearance notwithstanding the fact that the inner bag may be in close conformance to the surface of the contents stored therein as a result of the vacuum. The package is formed by applying adhesive in prepatterned areas along selected portions of webs or sheets to form the package, sealing the sheets together, and thereafter folding the package into the desired shape and sealing its bottom ends and top ends and its vertical back seam by the application of energy, such as heat, thereto.
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patent: 3967728 (1976-07-01), Gordon et al.
patent: 4085244 (1978-04-01), Stillman
patent: 4135622 (1979-01-01), Glick
patent: 4268531 (1981-05-01), Whiting, Jr.
Fres-Co System USA, Inc.
Spruill Robert L.
Studebaker Donald R.
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