Adhesive bonding and miscellaneous chemical manufacture – Methods – Surface bonding and/or assembly therefor
Patent
1993-11-15
1996-05-07
Engel, James
Adhesive bonding and miscellaneous chemical manufacture
Methods
Surface bonding and/or assembly therefor
156161, 1565831, 28201, 139257, B32B 3100
Patent
active
055142346
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to a method for fixing the ends of a yarn layer wound in an ordered manner on a beam, in which method the yarns are aligned, tensioned and fixed at their free ends.
Methods of this kind are employed in textile mills at various stages of the production process, for example in warping or sizing, during drawing in or knotting, or in weaving. The fixing takes place, as a rule, by means of a rail or a comb, this always necessitating an appreciable outlay for carrying out the fixing. Moreover, the rails or combs used for the fixing are, as a rule, relatively heavy and cumbersome, and they are therefore often abandoned and the fixing of the yarn ends is carried out by knotting or tying, although this makes handling more difficult in the next processing stage.
Now the invention is to provide a method of the type mentioned in the introduction, which can be employed simply, universally and quickly and which guarantees that the existing order of the yarn layer is maintained as effectively as possible.
This object is achieved, according to the invention, in that the fixing takes place by welding the yarns together with a foil.
In a method of this type, described in JP-A-113 056/1991, for preparing a warp for the start of weaving which is drawn into a harness, the warp yarns are adhesively bonded, by means of foils consisting of synthetic resin, together with a piece of fabric located in the weaving machine, said foils serving as an adhesive between the fabric and the warp yarns and a fabric tape covering their top side, so that a multi-layer construction is obtained.
This sandwich structure is relatively complicated to produce, and it proves a difficulty that the operation takes place directly on the weaving machine, that is to say where restricted conditions of space prevail. In this type of fixing, the tensions of the individual warp yarns are compensated relatively poorly, and therefore fabric of perfect quality is produced only approximately 100 to 150 cm after the bonding point. This leads to appreciable waste which, in addition to the relatively large amount of time required for the bonding operation and the lack of easy access for attendance, constitutes the principal disadvantage of this method.
Since no adhesive bonding together with a fabric is carried out in the method according to the invention, this method, when employed for preparing a drawn-in warp for the start of weaving, is not tied to the weaving machine, but can be carried out at any suitable point between the drawing-in machine and weaving machine. The preparation time for the start of weaving on the weaving machine itself is well below five minutes, for example around three minutes, because the welded portion has such small dimensions that it can be threaded in easily on the sand roll. Threading in on the sand roll is assisted by the rigidity of the foil. The result of this is that foil is substantially simpler to handle than a fabric strip. A further advantage to be mentioned in comparison with a fabric strip is the elasticity of the foil which allows a compensation of the yarn tension and which ensures that fabric of perfect quality is produced as early as 10 to 20 cm after the welding point.
The invention relates, furthermore, to a device for carrying out said method, with means for tensioning and with means for fixing the yarns. The device according to the invention is characterised in that the last mentioned means have two parallel welding bars which are adjustable relative to one another between a position of rest and a working position and which, in their position of rest, form a gap for the passage of the yarns and for receiving the foil.
The invention is explained in more detail below by means of exemplary embodiments and the drawings; in these:
FIG. 1 shows a perspective representation of a device for preparing a warp for the start of weaving,
FIG. 2 shows a detail of the device of FIG. 1; and
FIG. 3 shows a front view of an alternative version of the device of FIG. 1 .
Although a device for preparing a war
REFERENCES:
patent: 2537007 (1951-01-01), Abbott, Jr.
patent: 4211594 (1980-07-01), Freitag et al.
patent: 4476173 (1984-10-01), Bachmann et al.
patent: 5032214 (1991-07-01), Kile
Plaschy Martin
Walser Felix
Engel James
Staubli AG
LandOfFree
Method and device for fixing the ends of a yarn layer wound in a does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method and device for fixing the ends of a yarn layer wound in a, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and device for fixing the ends of a yarn layer wound in a will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1224479