Automatic stitching by programmable sewing machine
US4092937A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 21, 1977 |
| Grant date | Jun 6, 1978 |
| Priority date | — |
| Expiry date | Mar 21, 1997 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD05B19/00
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A programmable industrial sewing machine adapted to learn and store a series of sewing machine operations for later automatic duplication, in an Automatic Sew Mode of operation, at the same sewing rate as the initial operation, or at a peak sewing rate achieved during each operation; or, in a Control Sew Mode of operation at a controlled lower sew speed. The automatic operation of the sewing machine may be interrupted in order to vary the sew speed, and will revert to automatic operation on operator command where the interruption took place. In the Automatic Sew Mode of operation, stitching may also be interrupted to vary a prior pivot delay time, i.e. a time duration with the presser foot elevated and the sewing needle in a lowered position through a work material. Again, stitching will be reinitiated on operator command at the point at which interrupted. In the Control Sew Mode of operation, stitching is interrupted at each pivot delay and requires manipulation of a foot treadle by an operator in order to resume stitching. Thus, the length of the pivot delay in the Control Sew Mode of operation is under operator control. In both the Automatic Sew Mode of operation and the Control…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.