Back to results
US 4,757,676 AGranted
Pneumatic splicer with thread twisting means
AssigneePentwyn Precision, Ltd.
InventorJames W. B. Clayton
Life of this patent
Estimating the term…
Loading patent…
Loading patent…
AssigneePentwyn Precision, Ltd.
InventorJames W. B. Clayton
Estimating the term…
A yarn splicer having a closable pneumatic chamber which is permanently open at each end so as to receive the yarns to be spliced from opposite ends, discrete yarn rolling means arranged on either side of the splicer adjacent each end of the chamber to engage the running portion of a respective yarn in the chamber, and yarn gripping means also disposed at either end of the chamber to engage the respective loose ends of the yarns. Actuation of the splicer results in a prescribed rolling action on the yarns in a direction to completely detwist them, and deactivation results in an equal and opposite action on the yarns so as to restore the original twist. The preferred arrangement has a biased lost motion linkage between the actuation means and the chamber-mechanism which provides a drive to the rolling means and gives an over-twist to the yarns during detwisting and which recovers the over-twist as well as restoring the original twist at the termination of the splice.
A yarn or thread splicer having a pneumatic splicing chamber through which the yarns to be joined pass in opposite directions, characterised in that it comprises discrete yarn rolling means disposed adjacent each end of the chamber, each said means for operating on the running end of a respective one of the said yarns, and respective yarn gripping means corresponding to each said yarn rolling means disposed adjacent the respective opposite end of the chamber for gripping the free or broken end of each yarn, said yarn rolling means each engaging a respective yarn and twisting it in a direction to cause unravelling of its strands at the commencement of the splicing operation and retwisting the respective yarn in the opposite direction to cause the normal twist to be restored to the yarn during the termination of the splicing operation.
Dependencies are inferred from the claim text.