Conveyors: power-driven – Conveyor section – Endless conveyor
Patent
1989-01-23
1989-12-19
Spar, Robert J.
Conveyors: power-driven
Conveyor section
Endless conveyor
198834, 198835, 198842, B65G 1502
Patent
active
048877085
ABSTRACT:
Drive apparatus for driving an endless moving conveyor belt for a power turn to change the direction of movement of articles in a transfer conveying system wherein the plurality of rolls at each end of the power turn over which the endless conveyor belt passes have a diameter less than about one inch. An endless chain is attached to the endless moving conveyor belt for movement therewith. A drive shaft is provided adjacent to each end of the power turn and has a drive roll having a tapered outer surface and a drive sprocket mounted thereon for rotation therewith. A snub roll shaft is provided adjacent to each end of the power turn and has a snub roll integral with the snub roll drive shaft and having a tapered outer surface and a snub roll sprocket mounted on the drive roll snub shaft for rotation therewith. An idler sprocket is mounted on the outer side wall adjacent to each end of the power turn. The endless moving conveyor belt is trained around the power turn so that at one end portion it moves first over the outer surfaces of the plurality of the rolls, then over a portion of the lower half of a drive roll's outer surface and then over a portion of the upper half of the snub roll's outer surface to provide a frictional driving force. At the other end portion, the movement is in a reverse order. The endless chain is trained around the power turn so that at one end it moves first over the idler sprocket, then over a portion of the lower half of the drive sprocket and then over a portion of the upper half of the snub roll sprocket to provide a positive driving force. At the other end, the movement is in a reverse order.
REFERENCES:
patent: 3044603 (1962-07-01), Fry
patent: 3100565 (1963-08-01), Fry
patent: 3217861 (1965-11-01), Daniluk et al.
patent: 3237754 (1960-04-01), Freitag, Jr. et al.
patent: 3358811 (1967-12-01), Gerrish
patent: 3851256 (1976-04-01), Gurewitz
patent: 4196804 (1980-04-01), Hecketsweiler et al.
patent: 4202443 (1980-05-01), Buhrer
"Sparks/Curveyor", Sparks Belting Conveyor Pamphlet 1/1988.
Portec Brochure, 1983.
Pp. 4-6 from Knife-Edge Owner's Manual.
Brown Robert D.
Compton Richard A.
Dayoan D. Glenn
Portec Inc.
Spar Robert J.
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