The Husking Test by two Rollers having a Shape of Hyperboloid of one Sheet of Revolution

Abstract

The husking test, in which the roller having a shape of hyperboloid of one sheet of revolution is employed, was made and the following facts were ascertained.
1. When paddy are supplied on generating straight lines in the nearest position, the husking ratio is not influenced by the position on which they are supplied. But when they come off these lines, the ratio gets lower.
2. By this apparatus the husking ratio remains higher than general ones even if the slit breadth between two rollers is rather wide and it is liable to break the alemon layer.
3. An auxiliary roller needs no special device to revolve, and only the roller with a shorter radius may be helped by subsidiary belt.
4. With the increased number of revolution of rollers the husking ratio gets higher.
5. This type of roller does not require less power than a right cylinder roller does, or rather it sometimes needs more power in practical driving.
6. Slip length is proved to be one of the important factors in husking.
7. If the slit breadth is excessively narrow, the re arises the possibility that the power required increases extremely.
In consequence, this type of roller is suitable for the case in which large capacity is required notwithstanding the fault of breaking of alemon layer.