Smooth walled flexible package

Details Smooth walled flexible package Smooth walled flexible package

B - Operations, Transporting

65

D

217/12, 156/7

B65D 81/00 (2006.01) B65D 30/08 (2006.01) B65D 81/20 (2006.01)

Patent

CA 1237392

IMPROVED SMOOTH WALLED FLEXIBLE PACKAGE 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 bay 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 pre- patterned 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.

519017

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