Patent ID: 8337375
Filing Date: 2012-12-25
Classification: B31C,Y10T

Abstract:
1. An apparatus for making a tube having a polygonal cross-section with at least one sheet band, the apparatus comprising: a shaft extending along a longitudinal axis, comprising a free end and rotatable about the longitudinal axis, the shaft being configured to rotate about the longitudinal axis to take up at least one sheet band to form a tube around the shaft, the shaft comprising a plurality of edges extending along the longitudinal axis such that the at least one band is wound around the plurality of edges to form a tube having a polygonal cross-section, the shaft comprising: a drive mechanism coupled to the shaft to rotate the shaft about the longitudinal axis and circulate the first and second belts; wherein a distance between the conveyor sections of the first and second belt mechanisms is adjustable for allowing the size of the tube's cross-section to be changed.