초록 ▼

A new method of making a form fill bag having a reclosable fastener thereon and a mechanism therefor wherein a continuous length of film is advanced and joined first and second fastener profile strips are laid laterally onto the film of a length substantially equal to one-half of the film width, the

A new method of making a form fill bag having a reclosable fastener thereon and a mechanism therefor wherein a continuous length of film is advanced and joined first and second fastener profile strips are laid laterally onto the film of a length substantially equal to one-half of the film width, the film is advanced and formed into a tube with the side edges folded together and seamed, the first profile strip is attached to the surface of the film prior to forming it into the tube and the second opposed interlocked profile strip is attached to the inner surface of the film after it is formed into a tube, and a cross-seam is formed in the tube above the closure strip to form the bottom of the succeeding bag and a completed bag is cut from the film by cutting below the bottom seam and above the fastener strips.

대표청구항 ▼

In a form fill process of making bags with reclosable fasteners comprising the steps: supplying a continuous film of plastic bag material; positioning a fastener having first and second interlocked fastener profile strips on the surface of the film; securing one of said strips to the film surface at

In a form fill process of making bags with reclosable fasteners comprising the steps: supplying a continuous film of plastic bag material; positioning a fastener having first and second interlocked fastener profile strips on the surface of the film; securing one of said strips to the film surface at a location corresponding to the reclosable opening of a bag formed from the film with the strip secured to the inner surface of one of the bag walls; forming the bag; and thereafter securing the other of said strips to the inner surface of the formed bag so that the strips will be on opposing bag surfaces at the bag opening.