Apparatus and process for producing a covered elastic composite yarn
AssigneeAkzona Incorporated
InventorErnest J. Griset, Jr.
Life of this patent
Estimating the term…
Abstract
A process and apparatus for covering elastic single strand core yarns with a plurality of inelastic cover yarns, such as nylon, is provided. The core yarn is stretched in a controlled manner between a set of feeder rolls and a pair of drawing rolls. Intermediate the feeder and drawing rolls, a thread guide is provided for accommodating the interlacing of a plurality of cover yarn strands with the single strand core yarn passing therethrough. The cover yarn and core yarn are further intertwined with one another at a nip formed at the drawing rolls by way of a slight twisting action applied thereto via a take-up spindle for the resulting composite yarn disposed downstream of the drawing rolls.
Claims21
In a process for covering an elastic core yarn with inelastic textured cover yarns, the steps comprising:
- continuously supplying an elastic core yarn to feeder means;
- applying a controlled stretch to said core yarn by passing the yarn between a pair of drawing rolls arranged downstream of said feeder means;
- intertwining at least two strands of textured cover yarn with said core yarn by passing the cover yarns and the core yarn through a thread guide disposed intermediate said feeder means and said drawing rolls, and
- further intertwining said cover yarns with said core yarn by applying twist thereto downstream of said drawing rolls.
An apparatus for covering an elastic core yarn with inelastic textured cover yarns comprising:
- feeder means for supplying a core yarn at a first predetermined rate;
- a pair of drawing rolls arranged downstream of said feeder means for withdrawing the core yarn from said feeder means at a second predetermined rate which is greater than the first predetermined rate, to thereby stretch the core yarn in a controlled manner;
- thread guide means disposed intermediate said feeder means and said drawing rolls for guiding said core yarn and at least two textured cover yarns along a preselected linear path so the cover yarns will intertwine with each other and said core yarn and form a composite yarn before entering between said pair of drawing rolls;
- and
- means disposed downstream of said drawing rolls, for applying twist to said composite yarn as it passes through said drawing rolls, whereby said cover yarns are twisted about said core yarn.
Dependencies are inferred from the claim text.