| 摘要 |
The support (1) includes a U-shaped fork (2) sufficiently wide to accept part (3) of the distributor (4). The design holds the distributor under gravity in the fork, coaxial with the main body (6) of the extrusion head. Preferred features: Fork rollers (5) contact the distributor at three or more points, shaped to hold it. The rollers occupy a common plane, perpendicular to the extrusion head axis. Each fork arm carries a terminal roller, at the same level as this axis. Movement is provided by a telescopic arm (7) running parallel to the axis, on which the fork is mounted.
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