| 摘要 |
This invention relates to a mandrel (14), fitted machine, and packaging piece and relates in particular to a mandrel for winding corrugated paper (10) and to a machine fitted with the mandrel for preparing a roll of corrugated paper (22) suitable for offering to a press, the press being of a type to form a shaped packaging protective piece. There is provided a mandrel (14) for winding a roll of corrugated paper (22) which includes at least one paper engagement member (24) mounted on the mandrel and drive means (32, 42) for the engagement member, there being a positive coupling (36, 40) between the drive means and the or each engagement member. There is also provided a packaging piece made by a process which includes the steps of {1} engaging a corrugation of the paper (10) by an engagement member (24) carried by a hollow mandrel (14), the mandrel having a rotational axis, the engagement member being coupled to a drive means (32, 42) movable in a first axial direction within the mandrel to cause the engagement member to project from the mandrel; {2} rotating the mandrel to draw the corrugated paper onto the mandrel; and {3} positively retracting the engagement member by movement of the drive means in a second axial direction opposed to the first axial direction whereby to permit the wound roll to be removed from the mandrel.
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