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US 4,228,639 AGranted
Production of yarn
AssigneeJames Mackie & Sons Limited
InventorsRobert J. Hunt, Norman A. Hill
Life of this patent
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AssigneeJames Mackie & Sons Limited
InventorsRobert J. Hunt, Norman A. Hill
Estimating the term…
In order to produce core yarn wrapped with at least two separate wrapper yarns of the same or opposite hands, core material is passed in succession through a pair of rotary hollow spindles, each carrying a package of wrapper yarn whereby the core material is wrapped and which are relatively displaced so that the path of the material between a point just before the entrance of the first spindle and a point just after the exit of the second spindle deviates from a straight line so as to cause the core material or the resultant yarn to engage a rotary end of at least one of the spindles so as to apply false twist. The spindles may be supported so that their axes are displaced or displaceable in relation to one another for which purpose each spindle may be carried by a mounting capable of angular displacement about a support shaft and capable of being secured in any one of a range of angular positions. The apparatus may also include a take-up roller or rollers and a pair of intermediate rollers between the exit of the first spindle and the take-up roller or rollers.
A method of producing core yarn wrapped with at least two separate wrapper yarns, comprising the steps of passing core material along a path passing in succession through a plurality of rotary hollow spindles, each spindle having an entrance and an exit, wrapping said core material with at least two wrapper yarns withdrawn from packages carried by respective rotary spindles, said wrapping resulting from rotation of said respective spindle, and causing said path of said core material between a point just before said entrance of the first spindle and said exit of the last spindle to deviate from a straight line in such a way that said material engages a rotary end of at least one of said spindles, whereby to apply false twist.
Apparatus for producing core yarn wrapped with at least two separate wrapper yarns comprising a plurality of hollow spindles, means on at least two of said spindles adapted to carry a package of wrapper yarn, means for providing rotary drive to at least part of each said spindle having wrapper yarn package supporting means and means supporting said spindles in relation to one another whereby said core material can pass through said spindles in succession along a path which deviates from a straight line between a point just before the entrance of the first spindle and a point just beyond the exit of the last spindle, said deviation being such that said core material engages a rotary end of at least one of said spindles.
Dependencies are inferred from the claim text.