Method and device for fixing the ends of a yarn layer wound in an ordered manner on a beam
AssigneeStaubli AG
InventorsMartin Plaschy, Felix Walser
Life of this patent
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Abstract
At their free ends the yarns are straightened, clamped and welded with a film. Welding is performed with two welding bars to which is allocated a brush beam to tension the yarns. The welding bars are borne and/or guided by a frame to which the brush beam is also secured. The frame is fitted on a mobile chassis which also has a holder to take a roll of welding film. For use in weaving preparation works and in weaving works, especially in preparing the warp and in starting weaving.
Claims23
Method for fixing ends of aligned yarns forming a warp-yarn layer wound in an ordered manner on a beam, comprising tensioning the yarns of the warp-yarn layer;
- positioning the warp-yarn layer between two plastic foil pieces with a portion of at least one of the plastic foil pieces projecting beyond the ends of the yarns forming the warp-yarn layer, and welding the yarns together with the two plastic foil pieces to fix the ends of the yams, the portion of the one plastic foil piece projecting beyond the ends of the yams providing a ran-in part for threading the warp yarn layer into a weaving machine.
Device for fixing ends of aligned yarns forming a yarn layer wound in an ordered manner on a beam, comprising:
- a pair of welding bars, at least one of said welding bars being movable so that said welding bars are positionable with respect to one another at a rest position in which a gap is formed between the pair of welding bars to permit the yarn layer to be located between the welding bars and a working position in which the welding bars are positioned in close proximity to one another for fixing together the ends of the yarns through use of a plastic foil;
- a rotatable brush beam for tensioning the yarns, said brush beam being movable in a vertical direction relative to the gap;
- and
- means for moving the brush beam in the vertical direction relative to the gap to lay the yarns of the yarn layer on one of the welding bars with a plastic foil piece interposed between the yarns and the one welding bar to permit fixing of the ends of the yarns when the welding bars are positioned in the working position with respect to one another.
Method for fixing yarns in a yam layer that are wound in an ordered manner on a beam to maintain the yarns in the ordered manner, comprising
- tensioning the yarns of the yarn layer, the yam layer having oppositely disposed sides;
- positioning a plastic foil piece on each side of the yam layer;
- welding the plastic foil pieces together with the yarns of the yarn layer to fix the yarns and maintain the yams in an ordered manner, the plastic foil pieces being welded with only a single layer of textile material interposed between the plastic foil pieces, said single layer of textile material being said yarn layer.
Dependencies are inferred from the claim text.