Abstract
Attempts have been made to propose a quantitative analysis of the relation between the productivity and the degree of opening, which is closely related to the arrangement of carding points and the operating conditions of a card. The following two assumptions were made to solve the problem easily; (1) a fiber tuft reaching a carding point is simply divided into two smaller tufts so that the proportion in weight of these tufts is equal to the value of the transfer coefficient, and (2) the degree of opening of web can be estimated by the mean value of logarithm of reciprocals of the weight of delivered tufts.
The distribution of delivered tuft weight, the distribution of the number of passings through the carding point and the degree of opening have been derived as the function of the transfer coefficient by these assumptions.
Then, taking account of the experimental results that the productivity is restricted by the fiber load on the cylinder from the standpoint of nep formation, the relation between the degree of opening and the productivity has been discussed.
