Sewing machine having presser bar system for maintaining constant contact force between presser foot and fabric
US5551361A · kind A · utility
6Cited by
2References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 17, 1995 |
| Grant date | Sep 3, 1996 |
| Priority date | — |
| Expiry date | Apr 17, 2015 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD05B29/02
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A sewing machine having a presser bar with a force transducer mounted thereon for detecting forces applied to the presser bar during high speed sewing and an electromagnetic actuator operatively connected to the presser bar. Circuit means is electrically connected to the force transducer and to the electromagnetic actuator and is adapted to control current to the electromagnetic actuator so as to maintain a constant contact force between the presser foot and a fabric being sewn.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.