Processes and apparatus for thermal treatment of filaments
AssigneeBarmag Barmer Maschinenfabrik AG
InventorsHeinz Schippers, Peter Dammann, Karl Bauer
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Abstract
Apparatus and process for thermal treatment of thermoplastic polymer multifile filaments embodying at least one stuffing chamber for forming at least one multifile filament into at least one tightly coherently packed filamentary body, feeding one or more of said filamentary bodies onto gas-permeable, slowly rotating drum on which it or they are conveyed in a side-by-side, spiral orientation by the rotating drum while a fluid, e.g., air is drawn through the filamentary bodies, said filamentary bodies being conveyed from the stuffing chamber at a constant rate and being deflected at a predetermined pitch angle before or during initial contact with the drum surface.
Claims27
A process for the thermal texturizing treatment of multifile filaments of thermoplastic synthetic polymers which comprises feeding at least one multifile filament into a stuffing chamber and herein forming a closely packed, coherent filamentary body, conveying said tightly packed, coherent filamentary body from said chamber substantially tangentially onto the surface of a gas-permeable, rotating drum at the entrant zone thereof by rotating means engaging the exterior of said body and providing a positive axial thrust to said filamentary body between said stuffing chamber and said entrant zone of said drum, imparting a thrust to said body in the axial direction of said drum as it moves onto the drum surface, forming spiral convolutions of said filamentary body about the gas-permeable drum whereby rotation of said drum moves said spiral convolutions axially from the entrant zone on said drum to an exit zone thereon, passing a gas through the spirally convoluted, filamentary body and the gas permeable surface of said drum, and withdrawing the multifile filament from said exit zone at a speed sufficient to dissolve the coherently packed filamentary body.
An apparatus for the thermal texturizing treatment of multifile filaments of thermoplastic, synthetic polymers, which comprises at least one stuffing chamber adapted for texturizing of said filaments, means for feeding at least one multifile filament at a high velocity into the stuffing chamber to form therein a tightly coherently packed, filamentary body, a rotatable drum having a cylindrical or slightly conically tapered surface, at least a portion of which is gas-permeable, a pair of opposed, rotatably driven conveyor rollers between said packing chamber and said drum for engaging therebetween the filamentary body and imparting thereto a positive conveyance to the filamentary body, and guide means for conveying said filamentary body onto said surface of said rotating drum at a pitch angle which causes said filamentary body or bodies to form side-by-side spiral convolutions on said surface of said rotating drum.
Dependencies are inferred from the claim text.