| 摘要 |
A machine and process for producing bags from roll stock of bag material are disclosed. The machine includes four subassemblies, a folding and cutting subassembly, a transport and first sewing subassembly and a second transport and sewing subassembly and a stacking subassembly. The folding and cutting subassembly, preferably includes a drum or reel with a plurality of peripheral clamps which are successively opened to receive the bag material and a blade positioned to force the bag material into an open clamp to define a fold. The adjacent closed clamp holding folded bag material tensions the bag material. A cutter severs adjacent folds between the adjacent clamps. Transfer and transport means are present to advance the folded cut bag blank past two sewing machines and then to the stacker subassembly. The process of this invention includes the steps of grasping the end of a continuous strip of bag material, deflecting a portion to define a fold, clamping the fold and transferring it to an adjacent station, repeating the folding and clamping operation to tension the material between folds, cutting the folds between adjacent tensioned regions to provide folded cut bag blanks. Next, the folded cut bag blanks are transferred to two successive sewing operations to sew one side and an end to complete a bag. Next, optionally, the bags may be stacked for subsequent transfer or use.
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