Unitary double-acting piston thread cutter assembly
US6286445A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 24, 1999 |
| Grant date | Sep 11, 2001 |
| Priority date | — |
| Expiry date | Sep 24, 2019 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD05D2207/02
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A unitary double-acting piston thread cutter assembly having a housing including an integrated cutter section and drive section forming a single unitary device. The thread cutter assembly includes a universal tension mount for releasably securing the thread cutter assembly to the top plate of a variety of different types and models of sewing machine. A V-shaped moveable blade has two sides with a pivot point defined at the intersection of the sides. Along one side of the moveable blade is disposed a cutting or knife edge. A double-acting piston and drive link are disposed longitudinally in the housing and connected so that they are both displaced at the same time. The drive link is also connected to the side of the moveable blade opposite that of the cutting or knife edge, so that movement of the piston and drive link in a longitudinal direction, in turn, causes the moveable blade to be displaced, whereby the cutting or knife edge of the moveable blade engages with that of a stationary blade and severs the thread chain.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.