Method and apparatus for controlling the sliver-thickness variation in a carding machine
US4099297A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Sep 3, 1976 |
| Grant date | Jul 11, 1978 |
| Priority date | — |
| Expiry date | Sep 3, 1996 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD01G23/06
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A method and apparatus for controlling the sliver thickness variation in a carding machine. The thickness variation of the sliver delivered from the carding machine is measured and an electrical signal corresponding to the thickness variation of the carded sliver is issued. A difference signal is created by comparing the above-mentioned electric signal, and a control pulse signal in accordance with the difference signal is intermittently created at predetermined time intervals, each of said time intervals being shorter than a time required for a length of the carded sliver which length corresponds to a long term variation of the carded slivers thickness. The supply amount of fiber tufts to the carding machine is intermittently adjusted for reducing the above-mentioned control signal toward zero by said control pulse signal at each of said time intervals.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.