Thread cutting device for sewing machine
US6817306B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 10, 2003 |
| Grant date | Nov 16, 2004 |
| Priority date | — |
| Expiry date | Mar 10, 2023 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD05D2207/04
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
Provided is a thread cutting device for sewing machine used when the operator performs a sewing operation while inserting an elastic cord in a circular part of a sewing object such as a waist part of underwear. When the sewing operation is completed, a moveable thread guard member and a thread nip member nip a cut end of a looper thread cut by an existing thread cutting device. With a fabric feed immediately after the next following sewing operation is started in this state, part of a looper thread hanging between a nip position of the cut end and the fabric is cut under sliding contact at a location extremely adjacent to the starting position of seams by using a cutting edge, facing to a needler location, of a blade fixed to a throat plate. This permits a remarkable reduction in the length of the looper thread end remaining at the starting position of the seams.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.