Textiles: manufacturing – Warp preparing or handling – Reeling or beaming
Reexamination Certificate
1999-05-18
2001-02-27
Vanatta, Amy B. (Department: 3741)
Textiles: manufacturing
Warp preparing or handling
Reeling or beaming
C028S194000
Reexamination Certificate
active
06192560
ABSTRACT:
The invention relates to a method for transferring a yarn sheet from a yarn winder onto a winding beam. With such methods or with such devices specifically for weaving workshops the warp beams are wound in the full width of the later warp. With the yard winding from which the yarn sheet is later removed it may be the case of a warp winding in a warping machine. Alternatively however also warp beams may be wound. Before the winding of the yarn sheet onto the beam the yarn sheet could furthermore pass through a treatment module such as e.g. a waxing device.
By way of EP-A-391 129 there is known a device for rewinding sheet warps in which above the warping sheet drum and the winding beam there is arranged a motorically drivable conveying means for a sheet warp gripping rod to be attached thereto during the laying around of the sheet warp. The conveying means consists of two endlessly revolving transport belts arranged parallel to one another and to the sheet warp yarns, wherein the belts are provided with suspension hooks thereon for the sheet warp gripping rod which is arranged to be suspended therebetween by its ends. The yarn sheet with the transfer is however wound over the bottom surface of the warping drum and reaches the warping beam via higher placed deflecting rollers. The continuous maintaining of a yarn tensioning is not possible with this since the sheet warp gripping rod for suspending in the suspension hooks must first be guided through manually below the bottom surface and then lifted. With this the yarn sheet may loosen on the transfer procedure which later leads to irregular warps.
With the known device according to the state of the art it is furthermore not possible to divert the present deflecting rollers between the warping drum and the beam. Also a treatment module for impinging the yarn sheet with a treatment fluid may not be incorporated.
It is therefore the object of the invention to provide a method and a device of the previously mentioned type in order to simplify and accelerate the transfer of the yarn sheet and in order to ensure a homogeneous quality of the yarn sheet on transfer. Furthermore the device should be applicable in a multitude of ways and selectively permit also the incorporation of deflecting rollers or treatment modules with a later beaming process. This object with respect to the method is achieved with a method as described below.
The suspension rod moved with a transfer means ensures a completely uniform removal of the yarn sheet in the transfer phase until the yarn sheet is fastened on the winding beam. Since constantly a yarn tensioning is maintained there does not exist the danger that the yarn sheet falls apart in an unordered manner. The yarn sheet is wound over the vertex line of the yarn winding which however presupposes that the yarn winding previously has been wound over the foot line according to the teaching of EP-A-517 655. On removal of the yarn sheet the suspension rod may be applied in a manner such that no loosening of the yarn sheet occurs.
The yarn winding with this is impinged by a braking force at least during the transfer of the yarn sheet. With this on displacing the suspension rod an almost constant yarn tensioning may be maintained. A braking means such as e.g. a drum brake is normally present on the winding means in any case.
The endless transport chains may be tensioned also over complicated curve paths and they require only a relatively small design cost. A parallel maintaining of the suspension rods to the rotational axes of the winding or the winding beam may be particularly easily achieved.
Design advantages may be achieved beacause the revolving direction of the transport chains is reversible and because the suspension rod may be transported to the winding beam on a lower chain face as well as on an upper chain face. In this manner with one and the same transfer device, according to the direction of movement of the transport chains two different guiding paths may be travelled. This may for example be applied in that between the two chain faces a deflecting roller or a treatment module for the yarn sheet is arranged in a manner such that the deflecting roller or the treatment module with the suspension rod may be travelled underneath on the lower chain face and travelled above on the upper chain face. If the treatment module for example consists of a sizing roller then the yarn sheet may be selectively guided over the sizing roller or bypassing the sizing roller may be stretched on the winding beam. In both cases no particular provisions are required and the yarn sheet remains tensioned, irrespective of over which guiding path it reaches the winding beam.
The transfer means is advantageously formed such that it engages over the winding device and the winding beam. The free distance between the periphery of the yarn winding and the suspension rod in the starting position on the one hand and between the winding beam and the suspension rod in the transfer position on the other hand should with this be as short as possible. Particularly advantageously with this the transport chains comprise at least one chain section which on the side of the winding machine distant to the winding beam runs between the plane of the rotational axis of the winding machine and the plane of the vertex line of the full winding. The transport chain in this manner may be led over a circumferential angle of up to 45E or more over the yarn winding from the top downwards. The suspension rod is at the same time in the starting position heavily approximated to the run-up point of the individual yarns on setting up the yarn winding. A loosening of the yarn sheet is also avoided independently of the circumferential direction of the transport chains because the yarn sheet can be wound over the vertex line of the winding. By way of this the suspension rod does not need to be guided through below the bottom surface before it may be suspended on the chains.
The synchronisation of the transport chains is effected advantageously via a gear shaft between the two outermost deflection wheels of a transport chain, preferably in a central region of the transport chains. The gear shaft then does not appear at the ends of the tension means gear is a disturbing manner as is the case with the device according to EP-A-391 129.
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patent: 2033738 (1936-03-01), Reiners et al.
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patent: 4141120 (1979-02-01), Schenk
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patent: 391129 (1990-03-01), None
patent: 0 391 129 A2 (1990-03-01), None
patent: 517655 (1992-05-01), None
patent: 0 391 129 B1 (1994-08-01), None
Search Report Nov. 11, 1999.
Bommer Guido
Ulbrich Horst
Benninger AG
Shoemaker and Mattare LTD
Vanatta Amy B.
LandOfFree
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