Sewing machine with thread tension releasing mechanism
US6050205A · kind A · utility
2Cited by
3References
10Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 31, 1999 |
| Grant date | Apr 18, 2000 |
| Priority date | — |
| Expiry date | Mar 31, 2019 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD05B47/00
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A sewing machine includes a thread tension applying mechanism for applying tension to a needle thread supplied from a needle thread supply source to a sewing needle, a thread tension releasing mechanism for releasing the thread tension applying mechanism from a tension applying state, a spring for driving the thread tension releasing mechanism, a switching mechanism for switching the spring between an operative state and a non-operative state, and a drive source for driving the switching mechanism.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.