Conveyors: power-driven – Conveyor section – Endless conveyor
Patent
1976-12-29
1978-01-10
Love, John J.
Conveyors: power-driven
Conveyor section
Endless conveyor
198831, B65G 2312
Patent
active
040674398
ABSTRACT:
An endless belt conveyor including straight path and curved path sections for the carrying and return runs of the belt. The carrying and return runs of the belt are supported on a support frame by troughing and support idlers. In one version of the invention, the carrying and return runs of the belt are caused to follow a predetermined curve through the curved path section of the conveyor by powered edge drive rolls on the outside edges of the belt runs having a speed which is greater than the belt speed thereby causing the edge of the belt on the outside of the curve to be stretched relative to its condition in the straight path section. In a second version of the invention edge drive rolls are also used on the edges of the belt runs at the inside of the curve. In the latter construction, the peripheral speed of the drive rolls at the inside of the curve is less than belt speed in the straight path section whereby the inner edge is compressed or stretched to a lesser extent than in the straight path section. In the second version of the invention, the difference in peripheral speeds of the inside and outside edge rollers determines the curvature of the belt in the curved path section of the conveyor.
REFERENCES:
patent: 1254941 (1918-01-01), Snow
patent: 2633975 (1953-04-01), Koerber
patent: 2759596 (1956-08-01), Keller
patent: 3300023 (1967-01-01), Creutzmann et al.
patent: 3550535 (1970-12-01), Rooklyn
patent: 3763993 (1973-10-01), Whikehart et al.
patent: 3773167 (1973-11-01), McGinnis
patent: 3856133 (1974-12-01), Dyachkov
patent: 3869574 (1975-03-01), Kume
patent: 3901379 (1975-08-01), Bruhm
patent: 4024949 (1977-05-01), Kleysteuber et al.
Allis-Chalmers Canada Limited
Love John J.
Schwab Charles L.
Thomson Richard K.
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