Wiper unit of a sewing machine
US5044290A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 24, 1989 |
| Grant date | Sep 3, 1991 |
| Priority date | — |
| Expiry date | Nov 24, 2009 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD05B65/06
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A wiper unit has a supporter secured to the arm of a sewing machine. A stopper is secured to the supporter. A wiper shaft is rotatably supported by the supporter. The stopper restricts the rotation of the shaft. A wiper is mounted on the shaft. The wiper has a wiper arm and a tip end thereof. The tip end has a hook for wiping the tip end of an upper thread. A wiper operation crank is secured to the wiper shaft for adjusting a turning operation thereof relative to the wiper. An operation link is connected by a pin to the operation crank. A driving unit drives the operation crank reciprocally and drives the crank and shaft to turn about the axis of the shaft.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.