Thread guiding and hold-down pawl for bobbin winding mechanism of a sewing machine
US4385574A · kind A · utility
1Cited by
5References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 20, 1981 |
| Grant date | May 31, 1983 |
| Priority date | — |
| Expiry date | May 20, 2001 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD05B59/00
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A control arm for bobbin winding mechanism in a lockstitch sewing machine is provided with a pawl which serves both to guide needle thread into a thread entering slot for a tensioning device on a bobbin case, and to hold an arm of the tensioning device in a position effective to prevent the thread from being pulled out of the slot.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.