Sewing machine thread monitoring system
US5199365A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jan 9, 1991 |
| Grant date | Apr 6, 1993 |
| Priority date | — |
| Expiry date | Jan 9, 2011 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD05B51/00
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A thread monitoring arrangement for monitoring sewing thread at different areas along the path of the thread inducing a switching process for signalling or stopping the sewing process upon the occurrence of thread disturbance. The thread monitoring arrangement includes first sensor units positioned in an area between a thread reserve and an associated tensioning device. Second sensor units are provided in the area between the tensioning device and the associated stitch formation site for sending signals in the case of thread disturbance. A monitoring switching arrangement is provided, evaluating signals from the sensor units differently to induce different switching processes, either alerting the operator or stopping the sewing process, after a predetermined time or immediately.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.