Apparatus for high speed beaming of elastomeric yarns
AssigneeE. I. Du Pont de Nemours and Company
InventorsJacek Zygmunt Mycielski, Gerardus van den Hoven, Frederik Jan Groot, Johannes Leonardus Jozefus Brouwers
Life of this patent
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Abstract
A beaming apparatus that includes a creel and warper head, the creel being positioned adjacent to the warper head, the creel having elastomeric yarn unwinder assemblies which include a guide support that supports rotating guides and stationary wound cakes of elastomeric yarn, a thread guide for orienting the unwound yarn towards the warper head, a front guide and tension bar positioned near the end of the creel, and a pivoting reed positioned before the warper head for orienting the yarn onto a beam are provided.
Claims12
A rotating guide for unwinding elastomeric yarn from a stationary cake of wound elastomeric yarn comprising
- a disk,
- a connector portion formed in the disk to allow the disk to be connected to means for rotating the disk,
- an aperture formed in the surface of the disk between the connector portion and the outer edge of the disk to allow elastomeric yarn to pass therethrough as the disk is rotated and elastomeric yarn is unwound from the cake, and
- means in the aperture for controlling the pulling force on an elastomeric yarn pulled through the aperture so that if the elastomeric yarn is unwinding freely from the cake the pulling force is decreased and if the elastomeric yarn is not unwinding freely from the cake the pulling force is increased.
An elastomeric yarn unwinder assembly comprising
- a rotating guide comprising a disk, a connector portion formed in the disk to allow the disk to be connected to means for rotating the disk, and an aperture formed in the surface of the disk between the connector portion and the outer edge of the disk to allow elastomeric yarn to pass therethrough as the disk is rotated and elastomeric yarn is unwound from the cake,
- means for rotating the rotating guide attached to the connector portion, and
- a stationary cake of elastomeric yarn positioned adjacent to the rotating guide.
In a method for unwinding a cake of wound elastomeric yarn by unwinding elastomeric yarn in a creel and winding the elastomeric yarn onto a beam in a warper head, the improvement which comprises
- providing an elastomeric yarn unwinder assembly including a rotating guide comprising a disk and an aperture formed in the surface of the disk, and a stationary cake of elastomeric yarn positioned adjacent to the rotating guide,
- passing a thread of yarn from the cake through the aperture on the disk and connecting the yarn to the beam,
- unwinding the yarn from the cake by providing a pulling force on the yarn by turning the beam and rotating the rotating guide as the beam is turning, and
- winding the yarn unwound from the cake onto the beam.
Dependencies are inferred from the claim text.