US 12,139,341 B2
Trough belt conveyor
Jorrit Wijnand Dix, Appingedam (NL)
Assigned to Bollegraaf Patents and Brands B.V., Appingedam (NL)
Appl. No. 17/596,933
Filed by Bollegraaf Patents and Brands B.V., Appingedam (NL)
PCT Filed Jun. 23, 2020, PCT No. PCT/NL2020/050408
§ 371(c)(1), (2) Date Dec. 22, 2021,
PCT Pub. No. WO2020/263083, PCT Pub. Date Dec. 30, 2020.
Claims priority of application No. 2023394 (NL), filed on Jun. 27, 2019.
Prior Publication US 2022/0234832 A1, Jul. 28, 2022
Int. Cl. B65G 15/08 (2006.01); B65G 15/62 (2006.01); B65G 21/10 (2006.01)
CPC B65G 15/08 (2013.01) [B65G 15/62 (2013.01); B65G 21/10 (2013.01); B65G 2201/02 (2013.01); B65G 2201/04 (2013.01); B65G 2207/48 (2013.01)] 11 Claims
OG exemplary drawing
 
1. A belt conveyor for conveying bulk material comprising:
a flexible conveyor belt loop tensioned around a pair of end pulleys at opposite ends of the belt conveyor, the conveyor belt loop having a momentarily upper transport section extending along a transport path over a transport deck and a momentarily lower return section extending under said transport deck,
trough forming guide surfaces under opposite side edge portions of said transport section and extending along said transport path, said trough forming guide surfaces each being inclined upward from said transport deck from under said transport section of said conveyor belt in a laterally outward direction transverse to the transport path,
wherein the transport section of the conveyor belt rests on the transport deck and on the trough forming guide surfaces with transverse sag so as to form a trough extending along the transport path, and
wherein a lower section of the transport path is steeper than an upper section of the transport path contiguous with said lower section, and
further comprising, under a transition from the lower section to the upper section, at least one roller having a horizontal axis of rotation perpendicular to the transport path and having a circumference of which a section projects upwardly from the transport deck,
wherein the trough is locally shallow or absent in a section of the belt above the roller.