Patent ID: 8827557

Claim:
An individual, end-sealed packaging bag comprising: a multilayer non-heat shrinkable film comprising: (a) an inner heat sealing layer, (b) an outer heat sealing layer, (c) an oxygen barrier layer positioned between the inner heat sealing layer and outer sealing layer, (d) a contaminated layer positioned between the outer heat sealing layer and the oxygen barrier layer; the film being formed into a bag defined by: a front panel and an opposing back panel connected to one another by a pair of side gusset panels, wherein either the front or back panel comprises a lap seal connecting the inner heat sealing layer to the outer heat sealing layer of the film, and wherein the lap seal extends between a first end and opposing second end of the bag: a first end seal connecting the inner heat sealing layer on the front panel with the inner heat sealing layer on the back panel between the side gusset panels and proximate to the first end of the bag; wherein the lap seal is peelable along a lap seal interface located between the outer heat sealing layer and the contaminated layer, where the lap seal has a lap seal peel strength between 250 grams per inch and 3000 grams per inch; and wherein the first end seal comprises a K-seal formation having at least three discreet heat seals proximal to the closed bag end which provides a squared end configuration to the bag and allows the bag to stand upright before it is filled.