초록 ▼

A zipper fusing machine is mounted on an open frame and includes a zipper supply mechanism, a zipper material fusing mechanism and a plastic web tensioning assembly. The zipper supply mechanism supplies zipper material to the fusing mechanism by a nip-roller assembly. A zipper tension assembly inclu

A zipper fusing machine is mounted on an open frame and includes a zipper supply mechanism, a zipper material fusing mechanism and a plastic web tensioning assembly. The zipper supply mechanism supplies zipper material to the fusing mechanism by a nip-roller assembly. A zipper tension assembly includes a two series of pulleys, one rotatably mounted on a support extending from the frame, the other series of pulleys are rotatably mounted on a pivot rod. The zipper material is wound between the series of pulleys in a serpentine manner. The fuse mechanism includes a pair of endless belts configured to have one vertical leg facing each other and spaced apart such that belts move passively as the zipper material and plastic web pass between the adjacent sides of the belts. A heat bar is located behind each belt and fuse the zipper material to the plastic web as they pass over the heat bar. A plastic web tension assembly is disposed below the fusing mechanism and provides tension to the plastic web as it enters the fusing mechanism whereby creasing of the plastic web is substantially eliminated.

대표청구항 ▼

A machine for continuously fusing a plastic zipper material between opposed sides of a length of a folded plastic bag film material, the folded plastic bag film material including a folded edge and an open edge extending along the length thereof and having a width between the folded edge and the ope

A machine for continuously fusing a plastic zipper material between opposed sides of a length of a folded plastic bag film material, the folded plastic bag film material including a folded edge and an open edge extending along the length thereof and having a width between the folded edge and the open edge, the machine comprising: a frame having opposing first and second sides: a plurality of guide rollers mounted on the frame in a longitudinal direction between the first and second sides, the guide rollers being arranged to guide the folded plastic bag film material from a roll through a vertical plane within the frame with the width of the folded plastic bag film material extending across the frame in the longitudinal direction; a fusing mechanism mounted on the frame and movable in the longitudinal direction for alignment with a selected vertical fuse path in the vertical plane between the opposed sides of the folded plastic bag film material; and a zipper supply mechanism mounted on the frame to feed the zipper material along the fuse path, the fusing mechanism including a pair of endless belts, each belt having a vertical leg disposed parallel to and closely spaced from an outer face of one of the opposed sides of the folded plastic bag film material, the belts being disposed on opposite sides of the fuse path, the fusing mechanism further including heaters and coolers disposed closely adjacent the vertical legs of the belts for continuously fusing the zipper material to the opposed faces of the folded plastic bag film material disposed in the fuse path and then cooling the fused zipper material and the film material.