Method and apparatus for simultaneous production of plural hollow fiber devices by winding

A process for the simultaneous preparation of several hollow fiber devices especially useful for fluid fractionation operations, which comprises winding at least one hollow fiber around at least three members located in such a manner as to obtain a fiber envelope having polygonal section, advancing the fiber envelope on the at least three members, cutting the fiber envelope in at least three places during the winding of the hollow fiber and the advancing of the envelope so as to obtain at least three distinct groups of hollow fiber lengths, the hollow fiber lengths being held during the cutting of the envelope, collecting and arranging the groups so as to obtain, with each one, hollow fiber lengths firmly fixed between two end walls, the latter being in different planes and at the extremities of the hollow fiber lengths which pass through the end walls and which leave their extremities open.