| 摘要 |
This invention is directed to apparatus for enlarging or belling an extremity of a plastic pipe so that the extremity of an adjacent length of pipe may be received and retained therein. An expanding mandrel is provided, and this mandrel includes expander jaws, expander wedges, and expander wedge guides which engage a tapered spindle. A continuous steel sheath surrounds the mandrel components and longitudinal movement of the tapered spindle provides progressive enlargement or reduction of the mandrel diameter.
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