Multi-needle double lock chain stitch tack, jump and thread trimming quilting method and apparatus
US5154130A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 30, 1991 |
| Grant date | Oct 13, 1992 |
| Priority date | — |
| Expiry date | Sep 30, 2011 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD05B57/02
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
An automatic thread trimming method and apparatus are provided for tack and jump sewing of fabrics. In a preferred embodiment, a quilting apparatus having a plurality of sets of, preferably, double lock chain stitch forming elements, is disposed on a mechanically linked mechanism in a reconfigurable array corresponding to an array of discrete patterns to be sewn. Each set of the array is equipped with a thread trimming element. In a preferred embodiment, a thread trimming cutting edge is formed on one surface of a thread stitch forming element, preferably on a revolving retainer element that is mechanically linked to the mechanism. When operated in a forward direction, a chain stitched pattern is sewn with the stitches formed in cooperation with the retainer revolving in a forward direction. Upon completion of the pattern, the mechanism is reversed for half of a cycle to bring the cutting edge against a thread, the thread tension is released, the fabric is advanced to pull the thread, the thread tension is reapplied to cause the thread to be cut, and the fabric is positioned for the start of a new discrete pattern.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.