Form fill and seal package with one-way vent

A reclosable bag, comprising:

• a bag body formed from at least one sheet of film material, said bag body having:
• a top end, a bottom end, a front wall, and a back wall, said front wall being joined to said back wall by upper and lower seams respectively provided at said top and bottom ends;
• and
• a reclosable fastener assembly joined to said front wall and comprising first and second interlocking profile strips respectively extending along the length of the fastener assembly, said profile strips being configured for releasable interlocking engagement with each other by the provision of at least one protuberance on one of said profile strips, and at least one groove defined by the other of said profile strips for respectively releasably receiving said protuberance,
• said first profile strip including a first body flange portion joined along an upper edge at a first seal to said front wall of said bag body and said second profile strip including a second body flange portion joined at a second seal to said front wall of said bag body, said second seal formed along an upper edge of said second profile strip, said first seal located above said second seal, at least one perforation through said front wall located between said first and second seals, said first and second body flange portions also substantially sealed along opposite vertical edges to said front wall of said bag body, said second seal having a vent passage along a length thereof wherein said second body flange portion is unsecured to said front wall;
• and
• one of said first and second profile strips including a seal flange portion, said fastener assembly including an peelable seal formed between and joining said seal flange portion of said one profile strip and the other one of said profile strips, said peelable seal located between said second seal and said protuberance, at least one gap provided between said profile strips and said peelable seal which opens into said bag body.

A reclosable bag, comprising

• a bag body formed from at least one sheet of film material, said bag body having a top end, a bottom end, a front wall, and a back wall, said front wall being joined to said back wall by upper and lower seams respectively provided at said top and bottom ends;
• and
• a reclosable fastener assembly joined to an inside surface of said front wall and comprising first and second interlocking profile strips respectively extending along the length of the fastener assembly, said profile strips being configured for releasable interlocking engagement with each other by the provision of at least one protuberance on one of said profile strips, and at least one groove defined by the other said profile strips for respectively releasably receiving said protuberance,
• said first profile strip including a first body flange portion joined to said front wall of said bag body, and said second profile strip including a second body flange portion having upper and lower regions joined to said front wall of said bag body,
• seal means joining said first body flange portion of said first profile strip and the upper region of said second body flange portion of said second profile strip to said bag body, said bag body including an access opening defined by a group of perforations, said seal means extending about said group of perforations to form a hermetic seal;
• and
• a one-way vent in gas flow communication with said perforations and an inside of said bag body through said seal means.

A film stock for use in a bag making machine, comprising:

• an elongate film having a width and a length;
• a plurality of fastener assemblies sealed to said film, spaced apart along the length of said film, each having first and second interlocking profile strips respectively extending along the length of the fastener assembly, said profile strips being configured for releasable interlocking engagement with each other by the provision of at least one protuberance on one of said profile strips, and at least one groove defined by the other of said profile strips for respectively releasably receiving said protuberance;
• said first profile strip including a first body flange portion joined at a first seal to an inside surface of said front wall of said bag body, said second profile strip joined by a second seal to the inside surface of said front wall of said bag body, a gas bypass opening provided around said interlocking engagement of said profile strips, said front wall including an openable joint between said first and second seals;
• said front wall having a vent opening therethrough;
• and
• a vent passage formed by said body flange portion and said vent opening through said front wall, said vent passage being openable under influence of internal bag pressure to expel gas from inside said bag body from said gas bypass opening to outside said bag through said vent opening.