Machine for forming random fiber webs

摘要

A web composed of long and short fibers can be produced on this machine. Two separate air ducts convey the two types of fibers to two rotating condensers on which the respective fibers are laid down forming fiber mats. The fibers are combed from the two mats by two rotating lickerins and are doffed from the lickerins by two separate air streams flowing past the lickerins and by the centrifugal forces created by the high speed rotation of the lickerins. They are carried by the air streams into a mixing and expansion chamber in which the fibers blend and intermingle. Pivotal vanes disposed above or in the air streams and a divider plate adjustable into the mixing and expansion chamber control the direction and flow of the air streams to control the positions and relative amounts of the long and short fibers in the random fiber web formed in the machine.