Conveyors: power-driven – Conveyor section – Endless conveyor
Reexamination Certificate
2006-02-28
2006-02-28
Bidwell, James R. (Department: 3651)
Conveyors: power-driven
Conveyor section
Endless conveyor
C198S835000, C198S689100
Reexamination Certificate
active
07004309
ABSTRACT:
A vacuum conveyor has a toothed belt with opposed sets of teeth along the sides of the belt inner surface; the belt is driven by a synchronous motor giving very precise delivery, the motor driving a toothed roll located in the conveyor center section within the loop of the belt. The oncoming and offgoing belt guidance rolls have replaceable bearing inserts; two rolls control the wrap and load transfer between the belt and the driving roll; the top reach of the perforated belt slides on plastic vacuum blocks, having through air passages in corresponding patterned relation at the surfaces of the blocks, bounded by air-sealing shoulder portions of the blocks.
REFERENCES:
patent: 3580450 (1971-05-01), Sparks
patent: 5156260 (1992-10-01), Dorner et al.
patent: 5361891 (1994-11-01), Greene et al.
patent: 5415273 (1995-05-01), Peterson
patent: 5871085 (1999-02-01), Yagi
patent: 6578705 (2003-06-01), Lunghi
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