Winding machine for groups of packages

A machine for creating at least one helical winding of a web extensible around a load, comprising:

• a stationary base for supporting the load,
• a fixed framework overlying said base,
• a moveable framework overlying the load vertically on the fixed framework,
• a horizontal circular guide rotatably supported by the moveable framework,
• a first motor for rotating said horizontal circular guide with respect to said moveable framework,
• a second motor for imposing vertical translations to the moveable framework, a reel-carrying framework rigidly suspended on said guide bearing a reel carrying the web,
• wherein the circular guide has a tubular section, and the circular guide is slidable within a seat integral to the moveable framework constituted by at least three groups for sliding and supporting the guide, placed circumferentially equally spaced along the moveable framework and each provided with at least one pair of wheels with mutually inclined axes which create the seat for sliding and retaining the guide,
• wherein the guide has a hollow cross section with respect to a vertical sectional plane, the hollow cross section having an outer circular shape, and the guide comprising two flat elements converging on a horizontal median plane of the guide which serve as a sliding seat for the pairs of wheels, said two flat elements being disposed in symmetric positions with respect to the horizontal median plane of the guide.