Screw conveyors in modern industry are often used horizontally or at a slight incline as an efficient way to move semi-solid materials, including fish meat and many others.
They usually consist of a trough or tube containing a spiral blade coiled around a shaft, driven at one end and held at the other. The rate of volume transfer is proportional to the rotation rate of the shaft. Screw conveyors can be operated with the flow of material inclined upward. When space allows, this is a very economical method of elevating and conveying. As the angle of inclination increases, the capacity of a given unit rapidly decreases.