| 摘要 |
The invention relates to a spreading unit for a container sleeving device, configured to spread open flattened tubular foil material to form a sleeve, to bring the sleeve in a target tubular shape and to discharge the sleeve towards the container, the spreading unit comprising a mandrel comprising: - an upstream mandrel element for spreading open the flattened tubular foil material having a substantially constant cross-section in axial direction; - a downstream mandrel element having a non-constant cross-section in axial direction; - an intermediate mandrel element positioned between the upstream and downstream mandrel elements; wherein the downstream mandrel element comprises flaring sides and tapering sides and the intermediate mandrel element is recessed relative to the upstream mandrel element to allow the upstream part of a sleeve to move radially inward when the downstream part of the sleeve moves along the flaring sides of the downstream mandrel element. |
