Plant for producing containers by drawing-blowing of preforms in plastic material

In a plant for producing containers by drawing-blowing of preforms in plastic material, comprising a conveying device for preforms along a path along whih are disposed conditioning and heating means, a drawing-blowing station and an extraction station, the conveying device for the preforms comprising a plurality of independent supports disposed side by side and sliding in a guide extending along said path, which is formed of a plurality of rectilinear slide rails forming right angles with each other, and in which the feeding of the supports along the guide is controlled by pushing members disposed in each angle of the guide;

• the improvement in which each support is elongated rectangular and carries only one preform;
• the guide comprising wide sliding rails extending in one direction and having a width corresponding to the length of the support, and narrow sliding rails extending perpendicularly to the wide sliding rails and having a width corresponding to the width of the supports;
• the supports moving longitudinally along the narrow sliding rails and transversely along the wide sliding rails so that the distance between the preforms carried by the supports is less along the wide sliding rails than along the narrow sliding rails, said path having two long sides along which said wide rails extend, interconnected at their ends by at least one short side along which said narrow rails extend, said drawing-blowing station being disposed along said short side, whereby the spacing between the preforms is augmented in the drawing-blowing station so as to facilitate the performance of a drawing-blowing operation thereon.