Intermittent top shirring attachment for sewing machine
US4466367A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 8, 1982 |
| Grant date | Aug 21, 1984 |
| Priority date | — |
| Expiry date | Oct 8, 2002 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD05D2305/06
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A shirring attachment includes a rotatable feed wheel 51 positioned over a stripper blade 60 and normally positioned in spaced relationship above the work surface of and in front of the sewing needle 45 of a sewing machine. A first ply of material 78 is extended over the work surface and beneath the stripper blade to the feed dogs 68 of the sewing machine, and a second ply of material 80 is extended over the stripper blade to the sewing needle. The rotatable feed wheel is driven with a peripheral velocity that corresponds to the speed of the sewing machine motor, usually at a higher velocity that the feed dogs, and the feed wheel is moved by an air-actuated cylinder 54 at the command of the machine operator down toward the stripper blade into engagement with the upper ply of material so as to feed the upper ply of material to the sewing needle at a faster rate than the movement of the lower ply of material. The upper ply of material is gathered at the needle of the sewing machine and sewn in its gathered condition to the lower ply of material.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.