Method for applying a narrow web zipper transverse to the film direction

A sealing device for a form fill and seal apparatus including:

• a first seal bar assembly and a second seal bar assembly, each seal bar assembly including a first seal bar for forming an upper transverse seal on a first container;
• a second seal bar for forming a lower transverse seal on a second container, said second container being subsequent to said first container;
• a zipper seal bar recessed within said first seal bar;
• and a slot formed between said first seal bar and said second seal bar;
• wherein said first and second seal bar assemblies moves in extending and retracting relative relationship with each other.

An apparatus for applying at least one side of a zipper to a traveling web comprising:

• means for indexing the web into a desired position;
• grooved rollers to position the zipper on the web, the zipper being transverse to a direction of travel of the web;
• means for momentarily pausing the web;
• means for applying a sealing bar so as to engage the web and the zipper between the grooved rollers and the sealing bar to tack the zipper on the web;
• and
• means for resuming the travel of the web.

An apparatus for applying at least one side of a zipper to a traveling web comprising:

• means for indexing the web into a desired position;
• grooved rollers to position the zipper on the web, the zipper being transverse to a direction of travel of the web;
• means for momentarily pausing the web;
• means for applying a sealing bar so as to engage the web and the zipper between the grooved rollers and the sealing bar to seal a lower half of the zipper on the web;
• and
• means for resuming travel of the web.

A method for applying at least one side of a zipper to a traveling web comprising the steps of:

• indexing the web into a desired position;
• using grooved rollers to position the zipper on the web, the zipper being transverse to the direction of travel of the web;
• momentarily pausing the web;
• applying a sealing bar so as to engage the web and the zipper between the grooved rollers and the sealing bar to seal a portion of a lower half of the zipper onto the web thereby providing a greater inside bag opening force when the zipper is used as part of a reclosable bag;
• and
• resuming travel on the web.