Method and machine for versatile stitching
US4373458A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 4, 1981 |
| Grant date | Feb 15, 1983 |
| Priority date | — |
| Expiry date | Jun 4, 2001 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S83/938
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A method and machine are provided for controlling the orientation of one or more sewing instrumentalities with respect to a workpiece while also controlling the path of movement of the workpiece. The one or more sewing instrumentalities are preferably rotated about an axis perpendicular to the plane in which the workpiece is moved. The invention furthermore provides for separate and independent control of each sewing instrumentality so as to thereby render one or both needles inoperative at various times during continuous operation of the machine. The invention still further provides for separate manipulation of the thread associated with each respective sewing instrumentality so as to allow for a pullback of this thread. In principle the invention is also applicable to other than sewing machines wherein one or more operative tools may, for example, perform such functions as marking, folding, pinking, or perforating.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.