| 摘要 |
A stand-up pack 20 has front and rear walls joined at their upper end and secured one to another along mutually spaced seams 22a, 22b extending between the top and bottom of the pack and a further seam 23 extending across the front of the pack, the front seam 23 being formed between the front wall and a portion 32 of the rear wall, the latter being folded forwardly to form a base to support the pack 20. This pack is advantageously quick, simple and efficient to manufacture and fill using a vertical form-fill-seal machine and provides a large surface area for the imprinting thereon of advertising material. The disclosure also relates to a method of forming such a pack, and apparatus including tooling (53, 54, 55 Figure 14) for forming the folds in the bottom of the pack and a shoulder (56 Figure 14) combined with a forming tube (58 Figure 14) and suitable seam heaters to form the pack and permit its filling with produce while in a part-completed state. |
