Process and apparatus for forming packaging bags with a fastener

A method of manufacturing a film to form a reclosable bag, comprising the steps of:

• moving the film and
• attaching sequentially and crosswise with respect to the direction of movement of said film, a fastener comprising a first strip containing at least one reclosable profile interlocked with another reclosable profile that is complementary thereto and contained by a second strip, which will be subsequently attached to said film;
• wherein each of said first and second strips contains at least one web extending substantially laterally on one side of the profile contained thereon;
• and
• wherein said fastener includes a peel-seal strip connecting the webs and disposed outside of the bag with respect to the first and second profiles.

A method of manufacturing a film to form a reclosable bag, comprising the steps of:

• moving the film;
• and
• attaching sequentially and crosswise with respect to the direction of movement of said film, a fastener comprising a first strip containing at least one reclosable profile interlocked with another reclosable profile that is complementary thereto and contained by a second strip, which will be subsequently attached to said film;
• wherein each of said first and second strips contains at least one web extending substantially laterally on one side of the profile contained thereon;
• and
• wherein said fastener includes a gasket membrane disposed between the reclosable profiles.

A method of manufacturing a film to form a reclosable bag, comprising the steps of:

• moving the film;
• and
• attaching sequentially and crosswise with respect to the direction of movement of said film, a fastener comprising a first strip containing at least one reclosable profile interlocked with another reclosable profile that is complementary thereto and contained by a second strip, which will be subsequently attached to said film;
• wherein each of said first and second strips contains at least one web extending substantially laterally on one side of the profile contained thereon;
• and
• wherein said fastener includes a membrane adapted for forming a pouring spout.

A method of manufacturing a film to form a reclosable bag, comprising the steps of:

• moving the film;
• and
• attaching sequentially and crosswise with respect to the direction of movement of said film, a fastener comprising a first strip containing at least one reclosable profile interlocked with another reclosable profile that is complementary thereto and contained by a second strip, which will be subsequently attached to said film;
• wherein each of said first and second strips contains at least one web extending substantially laterally on one side of the profile contained thereon;
• and wherein said fastener includes a slider for opening and closing said fastener.

A method of manufacturing a film to form a reclosable bag, comprising the steps of:

• moving the film;
• and
• attaching sequentially and crosswise with respect to the direction of movement of said film, a fastener comprising a first strip containing at least one reclosable profile interlocked with another reclosable profile that is complementary thereto and contained by a second strip, which will be subsequently attached to said film;
• wherein each of said first and second strips contains at least one web extending substantially laterally on one side of the profile contained thereon;
• wherein said method is performed by an automatic forming, filling and sealing machine;
• and
• wherein said reclosable profiles are disengaged upstream of a filling tube of said forming, filling and sealing machine;
• said method further comprising a step of aligning and interlocking said reclosable profiles downstream of said filling tube.

A machine for forming, filling and welding a reclosable bag, comprising:

• a filling tube;
• and
• first means for welding a first web of a fastener having complementary engageable reclosable profiles to a film, said first welding means being disposed upstream of said filling tube;
• second means for welding a second web of said fastener to said film, said second welding means being disposed below said filling tube;
• and
• third means for welding together longitudinal edges of said film;
• wherein said first and second welding means are disposed to respectively weld said first and second webs transversely with respect to a direction of movement of the film;
• and
• wherein said filling tube includes a longitudinal groove adapted for guiding a slider of said fastener when said fastener passes over said filling tube.

A fastener for a reclosable bag produced on a forming, filling and sealing machine, comprising:

• at least one first reclosable profile being supported on a first strip, said first strip including a first web extending substantially laterally from one side of said first profile, said first web being adapted for attachment to a film of said bag;
• at least one second reclosable profile being supported on a second strip, said second strip including a second web extending substantially laterally from one side of said second reclosable profile, each of said at least one second reclosable profile being complementary to and engageable with a respective one of said at least one first reclosable profile, said second web being adapted for attachment to the film of said bag;
• and
• a gasket membrane disposed between said first and second reclosable profiles.

A fastener for a reclosable bag produced on a forming, filling and sealing machine, comprising:

• at least one first reclosable profile being supported on a first strip, said first strip including a first web extending substantially laterally from one side of said first profile, said first web being adapted for attachment to a film of said bag;
• and
• at least one second reclosable profile being supported on a second strip, said second strip including a second web extending substantially laterally from one side of said second reclosable profile, each of said at least one second reclosable profile being complementary to and engageable with a respective one of said at least one first reclosable profile, said second web being adapted for attachment to the film of said bag;
• and
• a slider for opening and closing said bag.

A reclosable bag, comprising:

• a film forming first and second walls of said reclosable bag;
• and
• a fastener comprising:
• at least one first reclosable profile being supported on a first strip, said first strip including a first web extending substantially laterally from one side of said first profile, said first web being attached to an open end of said first wall;
• at least one second reclosable profile being supported on a second strip, said second strip including a second web extending substantially laterally from one side of said second reclosable profile, each of said at least one second profile being complementary to and engageable with a respective one of said at least one first reclosable profile, said second web being attached to an open end of said second wall;
• and
• a slider for opening and closing said first and second reclosable profiles;
• wherein each wall includes a film extension extending from a side cut in said wall to beyond said reclosable profiles and said slider, said film extensions being sealed together beyond said reclosable profiles and said slider.