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US 4,981,208 AGranted
Magnetic drive spiral conveyor system
AssigneeThe Cambridge Wire Cloth Company
InventorGarland W. Jones
Life of this patent
Estimating the term…
Abstract
A spiral conveyor system utilizing an endless flat belt is disclosed. The belt travels in an endless path which includes a spiral portion. The belt is primarily driven in the spiral portion by a frictional engagement between the belt and a rotating driving element. The frictional engagement results from a combination of a tension induced in the belt by a secondary drive and a magnetic force between the rotating driving element and the belt.
Claims23
A conveyor system comprising:
- an endless belt having a plurality of links connected together and adapted to permit passage of the belt around lateral curves;
- means to support said belt for passage through an endless path including a spiral portion extending through a plurality of vertically spaced loops with the belt curved laterally in each of the loops, an approach portion leading into a first loop at one end of the spiral portion and an exit portion leading away from a last loop at the other end of the spiral portion;
- a driving means having drive surfaces engaging the belt in a frictional driving relationship along a radially inner edge of the belt in each of the loops;
- and
- means for providing a magnetic force between the driving means and the belt such that the frictional contact between the two is increased.
2 more elements
Dependencies are inferred from the claim text.