Precision wind synthetic elastomeric fiber and method for same
US8910896B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 23, 2009 |
| Grant date | Dec 16, 2014 |
| Priority date | — |
| Expiry date | Aug 5, 2031 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/298
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A method of winding an elastomeric yarn, such as spandex, onto a spool includes the steps of providing a spool; providing an elastomeric yarn; rotating the spool at a speed to define a spool rotation speed; moving the yarn traversely with respect to the spool in an alternating to and fro manner to define a traverse frequency; winding the yarn onto the spool; controlling the ratio of the spool rotation speed to the traverse frequency to define a wind ratio during the winding of the yarn onto the spool; and decreasing the traverse speed as the yarn is wound onto the spool in an inverse proportion to an amount of yarn that has been wound. The winding of the yarn onto the spool forms a yarn cake on the spool. The traverse speed may be decreased in inverse proportion to a diameter of the yarn cake. The method may further include the step of shifting the yarn by a pitch for each rotation of the spool.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.