be positioned at the end regions of the catenary curve 20 to limit curvature at those regions as a further alternative not shown particularly in an arrangement in which thin walled tubing is extruded instead of a take up spool the second axial tensioning means in the previously described installation may be arranged to deliver extrudate as a straight product to cutting means to produce cut straight lengths of the product where the extrudate is of relatively small section a rotating cutter and magazine may be utilised the magazine takes the form of a three lobed rotor housed within a horizontally extending cylindrical sleeve open over a lower 120 u00b0 of arc to register with the lobes on the rotor a two part blade is mounted at the entry to the magazine a first part being secured to the rotor and having suitable apertures aligned with interstices intermediate the lobes and the second part being secured to the cylinder with a single aperture in alignment with the interstices intermediate the lobes when in an upper segment of the sleeve in operation indexing means position the rotor with one of the apertures in the first blade registering with the aperture in the second blade extrudate is fed through the apertures into the corresponding interstice for a predetermined length whereupon a control sequence is initiated to rotate the rotor and first blade thereby severing the extrudate and registering the next aperture in the first blade with the single aperture in the second fixed blade to permit extrudate to feed into the adjoining interstice the cut length of extrudate then falls from the open portion of the sleeve to suitable collecting means whilst the cutting and indexing step.