Apparatus for processing a warp sheet of yarns
AssigneeBarmag AG
InventorsKarl Bauer, Michael Hanisch, Erich Lenk
Life of this patent
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Abstract
An apparatus and method for processing a warp sheet of synthetic multifilament yarns is disclosed, and wherein the yarns may be withdrawn from supply packages and advanced along a path of travel in warp sheet form, heated and drawn while in advancing warp sheet form to orient the filaments, and then wound for example on a warp beam. Upon detection of a yarn break, the advance of the warp sheet is terminated, and means are provided for interrupting the application of heat to the sheet while the advance is terminated so as to avoid damage to the remaining yarns from a continued application of heat.
Claims11
An apparatus for processing a warp sheet of yarns comprising
- means for advancing the warp sheet along a path of travel while drawing the warp sheet,
- heating means positioned along the path of travel for applying heat to the advancing warp sheet, and including at least one heated surface extending transversely across the warp sheet, and
- control means for selectively terminating the advance of the warp sheet upon a yarn break or the like, and including heat interruption means for selectively interrupting the application of heat from said heated surface to the warp sheet upon the termination of the advance, said heat interruption means including a cover having a width which is at least equal to the length of said one heated surface, and means mounting said cover for movement between an inoperative position wherein the warp sheet is in contact with the surface of said one heated surface and an operative position wherein the cover is disposed between said heated surface and the warp sheet, and such that movement of said cover from said inoperative position to said operative position acts to lift the warp sheet from contact with said one heated surface.
An apparatus for processing a warp sheet of yarns comprising
- means for advancing the warp sheet along a path of travel while drawing the warp sheet and including a pair of spaced apart guide rolls,
- heating means positioned along the path of travel for applying heat to the advancing warp sheet, and including a heated surface fixedly mounted between said guide rolls, and
- control means for selectively terminating the advance of the warp sheet upon a yarn break or the like, and including heat interruption means for interrupting the application of heat from said heated surface to the warp sheet upon the termination of the advance, said heat interruption means including a cover overlying a portion of the outer periphery of each of said guide rolls, with each cover having an arcuate curvature in cross section which is similar to the curvature of the outer periphery of the associated roll, and with the two covers being mounted for pivotal movement about an axis parallel to the axis of the associated roll so as to be movable between an inoperative position wherein the warp sheet is in contact with the periphery of the rollers and is closely adjacent said heated surface, and an operative position wherein the warp sheet is in contact with the covers and is separated from the surface of the rolls and the heated surface.
Dependencies are inferred from the claim text.