Sewing machine with an ultrasonic heater for folding back sewn edges
US4823713A · kind A · utility
10Cited by
9References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 7, 1987 |
| Grant date | Apr 25, 1989 |
| Priority date | — |
| Expiry date | Oct 7, 2007 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD05D2305/26
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A sewing machine for sewing together two sheets of material and for separating and pressing their edges, includes folding means for separating and folding the edges and an ultrasonic generator for pressing and creasing them. An additional device includes a speed sensor for sensing a sewing speed of the sewing machine and a control device for controlling the ultrasonic generator to vary a strength of the ultrasonic wave according to the sensed sewing speed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.