Electronically controlled top feed arrangement for a sewing machine
US4214543A · kind A · utility
3Cited by
9References
3Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 5, 1979 |
| Grant date | Jul 29, 1980 |
| Priority date | — |
| Expiry date | Jul 5, 1999 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD05B19/16
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A sewing machine is provided with an electronically controlled top feed arrangement wherein an upper feed dog and a presser foot are adapted to alternately apply and relieve pressure upon a work fabric, the upper feed dog and the presser foot being oppositely phased with respect to each other. A linear actuator is coupled to reciprocate the upper feed dog along a feed line and a memory stores feed data including for each stitch a first data portion for controlling the feed stroke of the upper feed dog and a second data portion for controlling the return stroke of the upper feed dog.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.