PULLING DEVICE Russian patent published in 2003 - IPC

FIELD: equipment for processing polymeric materials to article, possibly transporting thin-wall cylindrical envelopes. SUBSTANCE: in pulling device centering rollers are mounted on axles mounted in levers arranged along radiuses in cross section of pulled envelope and arranged on rigid rod inserted into drift of gage. Two drive rolls and four backup rollers are arranged in planes of envelope diametrically opposite one relative to another. Working surfaces of drive rolls and of centering rollers are covered with elastic material such as rubber. EFFECT: possibility for transporting thin-wall envelopes without their deformation and without change of contour and dimensions of their cross section, simplified design, lowered metal consumption. 2 cl, 2 dwg