Process for the production of uniform yarns via reduced tension-induced slippage
US5136763A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 18, 1990 |
| Grant date | Aug 11, 1992 |
| Priority date | — |
| Expiry date | Dec 18, 2010 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD02J1/227
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
In processes of the production of thermoplastic polymer yarns, a process for controlling slippage of yarn on rolls across which there is a tension change. The yarn is advanced along pairs of rolls with the yarn contacting the rolls in successive wraps. At least one of the rolls is driven and has a changing diameter as the yarn advances between at least two of the successive wraps. The wraps contact the contact areas on the surface of the driven roll to each define a total wrap angle for the wrap. The number of wraps is selected and the diameter of the driven roll at the contact areas is selected to increase or decrease the tension while preventing a wrap angle in creep for any one of the wraps from being greater than about 90% of the total wrap angle for the wrap.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.