| 摘要 |
A unit for picking up and opening a tubular container has a first arm hinged to a frame at a first hinge axis, a second arm hinged at a second axis, and a third arm hinged to the first arm and to the second arm. The frame, first, second and third arms form a four-bar linkage. A fourth arm is hinged to the third arm and bears first aspirators. A fifth arm abuts the first sheet of the tubular container. In an initial pick-up configuration, the third arm is retracted and the fourth arm is in a retracted angular position so that the first aspirators intercept the first sheet. In a final release configuration, the third arm is in a second advanced position and the fourth arm is in a second advanced angular position such that the first aspirators can release the tubular container in a receiving station.
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