Patent ID: 6491433
Filing Date: 2002-12-10
Classification: B65D

Abstract:
A vented bag comprising:a length of generally tubular, substantially gas-impervious material having one end thereof collapsed with facing surfaces joined together, at least a segment of the joined end being sealed by a plurality of at least three spaced apart seal lines extending along said segment, each of said seal lines having a single opening therein, the openings in adjacent ones of said seal lines being disposed proximate opposite ends of the respective lines, the bag being characterized in that between each pair of adjacent seal lines, the width of the portion of the segment of tubular material between the seal lines on one side of the bag is unequal to the width of the corresponding facing portion of material on the other side of the bag such that the facing portions tend to remain separated from each other, whereby a tortuous channel is formed extending through a first of said openings, a first passageway defined by a first pair of said seal lines and the facing portions of said segment disposed therebetween, through a second of said openings and a second passageway defined by a second pair of said seal lines and the facing portions of said segment disposed therebetween, and through a third of said openings, said tortuous channel providing a communicative path for gases between the interior of said bag and the exterior of said bag but tending to form a barrier to passage of liquids or solids.