Package having inseparable seals and a modified ply-separation opening
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United States of America Patent
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Nov 21, 1989
Issued Date -
N/A
app pub date -
Apr 17, 1989
filing date -
Jul 20, 1984
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The invention discloses a multiple layer packaging film, packages made therefrom and a method of opening the packages. The invention provides inseparable seal strength and in some cases hermetic seals, in combination with peelable ply separation opening for access to the contents of the package, while at the same time providing excellent barriers to transmission of oxygen and moisture. Certain embodiments provide for improved abuse resistance, excellent graphics, and other improvements. The method of opening the package depends on separating opposing ones of the package sidewalls, forcing the opening tear to be propagated partially through the film to a peelable layer interface, with subsequent ply separation along the interface to effect completion of opening of the package.
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