| 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. A roll of folded web is provided, and the loose edges are turned inwardly to form upper hems for the bags. The web continues to move, and a cutter is actuated to move through a circle and engage the web to punch finger holes in the hem. The web is further carried to a tandem sealer, the web passing over a roll where heated air is directed at the area of the hem. A "Teflon" strip is placed between the hems to prevent sealing them together. The web continues to a second sealing roll where the opposite side is sealed in the same way. The final step utilizes a stop-start apparatus with a side sealing blade. The side sealing blade has one radius for the body of the bag, and a larger radius for the hemmed area. |
