Contact roller preventing air inclusion during high speed winding of e.g. plastic or paper onto roll, includes narrow gaps for clearance-relieved levers and supports, assuring absence of marks on product

摘要

Internal bearing components of the hollow cylindrical roller segments, terminate inside the cylinders, just before the contact roller end faces. The open clearance so formed, contains a bearing components support (5) and/or an engagement lever (6). The support and/or lever include a partial annular groove allowing the roller end segment to rotate, avoiding rubbing contact. Preferred features: The support (5) is so shaped that a line of curvature also runs through enlarged portions outside the annular groove (7). Roller segments (2) can be turned through an angle, carried on an eccentric (12) in a bearing. The bearing is mounted for eccentric rotation on the axis (1), by the lever is fastened to it. Adjacent roller segments have both a bearing support (5) and a lever (6) between them, extending normally to the axis. The rear wall (8) of the annular groove (7) has a thickness less than 2 mm, preferably 0.7-1.0 mm. Roller segment, lever and contact roller of required length are connected together. The corresponding machine for paper or plastic sheet rolling, is also claimed. Arrangement of the contact roller system is such that the angle of wrapping of the running band is 5 deg -30 deg , preferably 8 deg -20 deg .