초록 ▼

A bag chain structure and method of making wherein fastener strips are attached across the surface of the film at predetermined intervals with the fastener strips having a plurality of rib and grooves so that the rib and grooves interlock when the strip is folded upon itself and the film is doubled

A bag chain structure and method of making wherein fastener strips are attached across the surface of the film at predetermined intervals with the fastener strips having a plurality of rib and grooves so that the rib and grooves interlock when the strip is folded upon itself and the film is doubled so that the lateral edges are in adjacency and are joined, cross-seals are placed across the doubled film at intervals spaced from the fastener strips to form the bottom of the bag; and tear perforations are placed in the doubled film between the bottom seal and the fastener so that individual bags can be torn off of the continuous film sheet.

대표청구항 ▼

A method of manufacture of reclosable bags comprising the steps: applying a plurality of fastener strips each closable on itself laterally across the width of a continuous sheet of film at predetermined spaced intervals; folding the film upon itself so that the opposed lateral edges are in alignment

A method of manufacture of reclosable bags comprising the steps: applying a plurality of fastener strips each closable on itself laterally across the width of a continuous sheet of film at predetermined spaced intervals; folding the film upon itself so that the opposed lateral edges are in alignment and with the fastener strips doubled and interlocking; forming a seam joining said lateral edges to complete a body for bags; forming lateral cross-seams at said spaced intervals spaced from the fastener strip with the cross-seam providing bag bottom seams; and forming a line of weakened tear resistance at said spaced intervals located between each of the fastener strips and said bottom seam so that individual bags can be removed from the strip.