Process for producing a combination yarn
AssigneeHeberlein Hispano SA
InventorLouis Vignon
Life of this patent
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Abstract
The object of the process is to produce a yarn comprising a core of continuous filament and a sheath of staple fibers. The staple fibers are delivered to a suction surface comprising a perforated collecting surface exposed to relative suction in a suction zone, the fibers being conveyed in a current of air moving virtually at right angles to the surfaces of two counter-rotating friction discs having narrowly spaced opposing faces defining a gap. From the suction zone, the staple fibers are transferred, generally at right angles to the axis of the current of air, into the gap. The continuous filament is united with the staple fibers in the suction zone, and both components are twisted in the gap between the counter-rotating friction discs.
Claims7
A process for the production of a combination yarn comprising a core of continuous filament and a sheath of staple fibers, comprising conveying the staple fibers in a current of air to a suction surface comprising a perforated collecting surface exposed to relative suction in a suction zone, the current of air moving at generally right angles to the surfaces of two counterrotating friction discs having narrowly spaced opposing faces defining a gap located relatively radially outwardly of the axis of said current of air, transferring the staple fibers from the suction zone generally at right angles to the axis of said current of air and into said gap so as to impart twist to the fibers, and uniting a continuous filament with the staple fiber in the suction zone so as to be twisted therewith in said gap to form a yarn comprising a core of continuous filament and a sheath of staple fibers.
Dependencies are inferred from the claim text.