On Conical Roller Expander

Abstract

From a study of the working of a conical roller expander, the authors have derived formulas for calculating the state of contact between cloth and expander, tension on cloth, and the degree of expansion.
The area of contact of cloth with the expander roller reaches a maximum at both ends of the roller, when a very close contact is obtained. The ends of the roller, then, contribute most to the expanding action. The speed of cloth is nearly equal to the surface speed of the ends of the roller; a considerable amount of slip between cloth and roller is inevitable in the middle of the roller. Here the expanding action is weak and the cloth relaxes. Cloth relaxation is difficult to control.