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Conveyor for conveying articles in a helically curved path

  • US 4,103,768 A
  • Filed: 12/07/1976
  • Issued: 08/01/1978
  • Est. Priority Date: 12/17/1975
  • Status: Expired due to Term
First Claim
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1. A conveyor for conveying materials in a helical curved path through a treating zone, comprising at least one conveyor belt, a cylindrical envelope fixedly mounted with its axis in a vertical position and defining the treating zone, a drum mounted coaxially within and spaced from said envelope, means for rotating said drum about its axis, a plurality of spaced supporting means fixed to the longitudinal edges of said conveyor belt, a plurality of projections mounted on the inner face of said envelope and arranged in a helical path thereabout having spaced convolutions to receive the spaced supporting means along that edge of said conveyor which constitutes the outer edge thereof for sliding engagement therewith when said belt is arranged in a helically curved path within the space between said envelope and said rotatable drum, a spacing belt arranged helically around the outer wall of said drum and in a plane parallel therewith, the convolutions of said spacing belt being spaced apart from each other, said spacing belt being frictionally engaged with said drum to rotate therewith, said spaced supporting means along that edge of said conveyor belt which constitutes the inner edge thereof being disposed between the convolutions of said spacing belt and frictionally engaged therewith to be driven thereby when said drum is rotated, said spacing belt having a width which separates adjacent convolutions of said conveyor belt a distance corresponding to the helical spacing of said plurality of projections on the inner face of said envelope whereby the conveyor belt is driven in a helical path by rotation of said drum and is disposed substantially horizontally while being moved helically within the space between said envelope and said drum.

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