Weighing scales – Weigher responsive material control – Feed
Reexamination Certificate
2006-03-21
2006-03-21
Gibson, Randy W. (Department: 2841)
Weighing scales
Weigher responsive material control
Feed
C177S145000, C073S001130, C474S101000, C198S813000
Reexamination Certificate
active
07015400
ABSTRACT:
A belt weighing apparatus for maintaining high accuracy in weighing by way of maintaining a fixed tension in the belt and preventing the belt from oscillating. The belt conveyor is comprised of a supporting frame, an upper guiding unit arranged on the supporting frame, a first and a second end-supporting device arranged on the supporting frame in proximity to the opposite ends of the upper guiding unit, a motor unit, at least one weighing platform arranged in-between the first and a second end-supporting devices, a lower guiding unit having a first property arranged on the supporting frame, and an endless conveyor belt having a second property is extended between said first and a second end supporting devices. At any instant of time an upper part of the belt rests on the upper guiding unit and the weighing platform defining a conveying pad of the belt weighing apparatus, and the lower part of the belt defining the return way of the belt weighing apparatus rests partly on the lower guiding unit that acts as a support for part of the lower run while another part of the belt hangs freely. The accuracy in the weighing is maximized by matching the first and the second properties such that any heat expansion or contraction of the belt will be compensated at least partly through expansion or contraction of the lower guiding unit.
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Olafsson Jon
Steingrimsson Kristinn
Valtysson Bjarni Valur
Gibson Randy W.
Marel HF
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