| 摘要 |
An expandable muff mould comprising an annular elastic metal member, which is provided with an axial slot, and a wedge means adapted to be detachably affixed in the slot, the muff mould expanding to a larger inner diameter with the wedge means inserted in slot than with the wedge means removed therefrom. The wedge means is attached to the inner side of the muff mould by a link mechanism which can be moved from a first position in which the wedge means is retracted from the slot and to a second self-blocking position in which the wedge means is locked in the slot by use of a suitable tool.
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