High-draft drafting device for a flyerless spinning process
US5016323A · kind A · utility
3Cited by
4References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 31, 1989 |
| Grant date | May 21, 1991 |
| Priority date | — |
| Expiry date | Aug 31, 2009 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD01H5/26
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
The drawframe has a preliminary drafting zone with a draft of from 4 to 8 as well as a main drafting zone with a draft of at least 30. In addition, a deflecting rod is disposed in the preliminary drafting zone in order to deflect the flow of fiber by about 1 millimeter. The deflecting rod is positioned centrally between the nips of the rollers defining the preliminary drafting zone. The guide surface of the deflecting rod may be convexly rounded not only transversely but also longitudinally in guiding the fiber flow thereover.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.