| 摘要 |
Bags, primarily for liquid or other flowable products, are formed from sheet plastics material to define a generally rectangular container closed at one end and with a filling and discharging arrangement at the other end. The bags are formed from an outer sheet 10 and an inner sheet 11, the outer sheet extending the full length of the bag whereas the inner sheet extends only part way along the bag. The outer sheet defines pockets 15 which act as the corners of the rectangle and the inner sheet extends across the corners of the rectangle and is connected to the outer sheet adjacent the edges of the pockets. The bag is made by feeding the two sheets of material onto a table, the outer sheet 10 lying below the inner sheet 11. The outer sheet is drawn down to form the pockets 15 at spaced locations along the table. The inner sheet is then welded to the outer sheet at 18, 19 adjacent the edges of the pockets. The ends of the inner and outer sheets are then drawn over, overlapped and connected together to form a tube and one end of the tube is closed after the bag is filled.
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