| 摘要 |
<p>The invention concerns a hollow cylindrical core member (17) suitable for supporting a roll (11) of absorbent sheet material. The core member (17) comprising a central axis (22), an outer cylindrical surface (20), and an inner cylindrical surface (23). The inner cylindrical surface (23) comprising engagement means suitable for rotationally locking said core member (17). The engagement means comprising at least one elongated recess (19) and/or projection (29) extending helically along said inner cylindrical surface (23), or at least one elongated projection (29) extending in a direction of said central axis (22).</p> |
