Spiral conveyor apparatus with automatic flow control

  • US 6,398,014 B2
  • Filed: 02/05/2001
  • Issued: 06/04/2002
  • Est. Priority Date: 08/19/1997
  • Status: Expired due to Term
First Claim
Patent Images

1. A spiral conveyor apparatus, comprising:

  • a plurality of conveyor segments arranged as a spiral, including at least an entry segment at a first level and an exit segment at a second level, each conveyor segment having a plurality of freely rotatable roller devices forming a conveying surface;

    a powered roller mounted in each segment, each powered roller being individually powered and individually controllable for selected rotation;

    means for sensing a conveyed article in each conveyor segment; and

    means for receiving signals from the sensing means and responsively controlling the powered rollers in a transport mode for transport of articles and in an accumulate mode for accumulation of articles.

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