| 摘要 |
<p>A web (20) is folded upon itself and transversely sealed. The web is cut into individual pouches (26) which are fed into gripper units (35), on an endless conveyor, each having a fixed leading jaw (171) and a movable trailing jaw (173) which grip the leading and trailing edges of the pouches. To open a pouch, the trailing jaw (173) is moved toward the fixed jaw (171) by a cam (231) and held in position by friction. Each opened pouch is carried around a filler unit (40) where it is filled. Thereafter, a cam causes said jaws to spread apart, stretching the mouth of the pouch, where it is sealed in a heat sealer.</p> |
