False-twisting system
AssigneeOda Gosen Kogyo Kabushiki Kaisha
InventorIsao Takai
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Abstract
A false-twisting system uses nipping type false-twisting apparatus designed to nip filament yarns between two intercrossing endless belts whose working surfaces are urged in the crossing region into engagement with each other. Monofilaments of a first multifilament yarn are wound fast round monofilaments of a second multi-filament yarn with combined S- and Z-twists to provide a crimped bundle of yarn closely resembling spun yarns.
Claims10
A composite crimped filament yarn, characterized by comprising first and second filament yarns each consisting of a plurality of monofilaments which are entangled firmly with monofilaments of the other of said yarns;
- each of said filament yarns having S- and Z-twists in combination;
- one of said filament yarns serving as a core while the other is twined round said core by a nipping type false twisting apparatus which causes said filament yarns to advance together therethrough in such a manner that said filament yarns are subjected to a greater tension at an inlet side of said false twisting apparatus than at an outlet side thereof.
A method of producing a composite crimped filament yarn, characterized by preparing a nipping type false-twisting apparatus which comprises two intercrossing endless belts pressed against each other in a crossing area and movable in contact with each other, and causing two filament yarns each consisting of a plurality of monofilaments to advance together through side false-twisting apparatus while subjecting said filament yarns on an outlet side of said false-twisting device to a tension preselected to be smaller in magnitude than a tension applied to said filament yarns on an inlet side of said false-twisting apparatus.
Dependencies are inferred from the claim text.