| 摘要 |
A method and apparatus for forming draw tape bags wherein the bag material moves continuously during the manufacture, except for the last step. The apparatus may be used with an in-line system wherein a tube (21) is extruded and a side gusset is formed to create a hem; or the apparatus may be used with an off-line system wherein folded bag material (54) is used, and a continuous hemmer is provided to turn the loose edges. In the off-line system a constant tension dancer (56) precedes the hemmer (59) to maintain constant tension on the web regardless of the size of the supply roll. The web continues to move, and a cutter (60) is actuated to move through a circle and engage the web to punch finger holes in the hem. A reel (36) of a strip of material is continuously fed, the strip being slit longitudinally to provide the draw tapes which are inserted into the hems. A tape guide (41) tensions the tape and assures that the tape is well within the hem, the hems are sealed, and the bags are side welded. |
