Method of determining setting values for a preliminary draft in a regulated draw frame
US6543092B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | May 31, 2002 |
| Grant date | Apr 8, 2003 |
| Priority date | — |
| Expiry date | May 31, 2022 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD01H5/38
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A method of determining an optimal preliminary draft of sliver running consecutively through a preliminary drafting field and a principal drafting field. The method includes the following steps: setting various levels for the preliminary draft; measuring quality-characterizing magnitudes of the sliver drafted at the various preliminary draft levels; deriving sliver number deviations from the quality-characterizing magnitudes; determining a function between the sliver number deviations and the respective preliminary draft levels; forming two approximated straight lines from the function; determining a value of a point of intersection between the two straight lines; and utilizing the value of the point of intersection for setting the optimal preliminary draft.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.