Marel Hf

Marel Iceland Ehf

Maref Hf.

Jon Thor Olafsson

Kristinn Steingrimsson

Jon Reynir Vilhjalmsson

Bjarni Valur Valtysson

This invention relates to a weighing platform and a weighing system including such a weighing platform for dynamically weighing a flow of items while being conveyed over the weighing platform. The weighing platform includes one or more load sensors used in conjunction with two or more flat weighing sections adapted to be placed on the load sensors. A first support connects the adjacent ends of the two or more flat weighing sections so as to form a continuous 2-dimensional planar surface there between. A second support maintains the distal ends of the two or more weighing sections, when connected together via the first support, at fixed height so as to create a zero weighing sensitivity at the distal ends.

Weighing system for dynamically weighing a flow of items with two consecutive flat weighing sections associated with a first support for aligning adjacent ends of the sections in the same plane and a second support to create a zero weighing sensitivity at the distal ends

The present invention relates to a method for weighing items and in particular to a method of filtering signals representing the weight of an item. The invention is applicable in all measuring instruments which indicate an average value calculated from a signal which also has unwanted components of one or more unknown frequencies. This is, for example, the case in volumeters, ampere meters and weighing-scales. Normally, the indicated result is the average value of the signal measured for a much longer time than the expected period of the slowest frequency component. This method is well known and reliable, but has the drawback of being very slow in situations where measuring speed is of importance.

Multi-filter

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.

Apparatus and method for controlling the belt tension of a belt weigher

A conveyor weighing unit is provided for weighing objects transported along a conveyor. The conveyor is driven in a revolving manner over a weighing device. The weighing device includes two or more weighing platforms, each platform having a pre-defined platform length. Each weighing platform continuously weighs the conveyor belt section placed thereover and the object transported thereon. One or more adjacent weighing platforms constitutes a weighing unit having a total platform length equal or greater than the object length to be weighed. The weighing platforms are operatively connected to a data processing unit, which receives and processes data from the weighing platforms, and based thereupon, determines the length and weight of the object. An accordingly appropriate number of adjacent platforms are selected, having an added length at least equal to a length of the object to be weighed to thereby enable minimal spacing between adjacent objects and maximum operational capacity.

Growing community of inventors

Gardabaer, Iceland

Jon Thor Olafsson