Combined spinning and twisting frame and method for producing twisted yarn

Claim 1

IN AN APPARATUS OF THE TYPE FOR EFFECTING THE OPERATIONS OF SPINNING, DOUBLING AND TWISTING YARNS, A ROVING FRAME, DRAFTING ROLLS FOR THE ROVING, AT LEAST ONE ROTATABLE SPINDLE, GUIDE MEANS FOR THE ROVING BETWEEN THE DRAFTING ROLLS AND THE SPINDLE, SAID SPINDLE HAVING UPPER AND LOWER ENDS WITH SAID UPPER END DEFINING A SMOOTH RIM AND A BORE EXTENDING THROUGH THE SPINDLE FROM THE UPPER END TO THE LOWER END, A COP OF SPUN YARN ON SAID SPINDLE, DELIVERY MEANS LOCATED BELOW SAID SPINDLE AND INCLUDING A CYLINDER AND PRESSURE ROLLER BETWEEN WHICH THE YARN IS CLAMPED, A WINDING ROLLER BELOW SAID DELIVERY MEANS, A YARN GUIDE AND A BOBBIN SPACED FROM SAID YARN GUIDE ON WHICH THE TWISTED YARN IS WOUND, THE ARRANGEMENT BEING SUCH THAT THE ROVING IS SPUN BETWEEN THE GUIDE MEANS AND THE UPPER END OF THE SPINDLE, WITH THE SPUN YARN FROM THE COP BEING BROUGHT INTO ENGAGEMENT WITH THE ROVING ADJACENT THE SMOOTH RIM OF THE SPINDLE AND DURING PASSAGE THROUGH THE BORE OF THE SPINDLE, THE SPUN YARN IMPARTING A TWIST TO THE ROVING IN THE DIRECTION OF ROTATION OF THE SPINDLE.