Band pattern explanation

The diagram below shows a section through a mandrel showing  a band pattern of 3 (three 'starts'), 2 and 1. The numbers show the order in which the bands are placed on the mandrel. In addition to band pattern some times the terms lagging or leading pattern may be used.  A leading pattern is when the bands (mandrel coverage) advance in the direction the mandrel is rotating, a lagging pattern  has the coverage advancing in the opposite direction to the mandrel rotation.