Sewing machine with swingable stitch forming unit
US5095834A · kind A · utility
5Cited by
4References
5Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 19, 1990 |
| Grant date | Mar 17, 1992 |
| Priority date | — |
| Expiry date | Nov 19, 2010 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD05B19/00
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A sewing machine with a pivotable stitch formation unit is provided such that it is possible to form a straight stitch or a zigzag stitch seam without loop stitches occurring on the fabric. The fabric is displaceable under the needle without rotation because of a pivoting arrangement of the head and the shuttle holder. The arrangement allows the sewing machine to be switched over from a straight stitch to a zigzag stitch operation due to the adjustment of the oscillation frequency of the needle bar holder relative to the oscillation frequency of the needle bar by means of a multistep shifting gear.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.