| 摘要 |
<p>The open mouth (12g) of a substantially tubular preform of orientable and/or crystallisable plastics material is shaped by supporting a tubular preform of orientable and/or crystallisable plastics material in a tubular sleeve (120) with a closed bottom of the preform resting on a bottom support (130) which is relatively displaceable in said sleeve, relatively displacing said tubular sleeve and said bottom support to axially displace the preform relative to the sleeve, applying force from the sleeve to the preform inwardly of the preform at an edge region of an open mouth of the preform to displace the edge region inwardly around the circumference of the tubular preform to provide said edge region with a reduced diametral extent compared to the diametral extent of the remainder of the tubular preform, and relatively moving a mandrel (140), which is posistioned within the sleeve and forms a circumferential gap therewith, through which gap the edge region extends, and said sleeve to fold a terminal end portion of said edge region outwardly to form an outwardly facing flange (18) on said edge region.</p> |
