Method to space dye yarn
US6019799A · kind A · utility
12Cited by
16References
7Claims
0Family size
Inventors
Key dates
| Filing date | Mar 6, 1998 |
| Grant date | Feb 1, 2000 |
| Priority date | — |
| Expiry date | Mar 6, 2018 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD06B11/0023
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
This invention relates to a method and apparatus for space-dyeing yarns. A yarn sheet passes over a yarn-driven roll equipped with a digital sensor that tracks the position of the sheet as it then passes through a dyeing apparatus. A computer precisely controls the spray application of dyes at the desired locations on the length of the yarn sheet. Undyed areas and areas of unwanted overlap of dyes are virtually eliminated, reducing the amount of off-quality yarn produced versus conventional methods. Sprayed dye droplets are collected and reused.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.