Automatic bobbin and bobbin carrier changing apparatus for sewing machine
US4648338A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 8, 1985 |
| Grant date | Mar 10, 1987 |
| Priority date | — |
| Expiry date | Jul 8, 2005 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD05B59/04
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
An apparatus for changing bobbins and bobbin carriers in a sewing machine utilizes a magazine having an opening, containing a bobbin carrier, aligned between the bobbin housing and an electromagnet which pushes the bobbin carrier through the opening into the bobbin housing and then withdraws. The magazine withdraws; the electromagnet moves adjacent the bobbin housing, and in withdrawing pulls a spent bobbin carrier therefrom and drops it. The magazine moves into alignment again between the bobbin housing and the electromagnet, and the cycle repeats. A computer, responsive to apparatus positions, regulates pneumatic valves and an electrical source to automatically effect operations.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.