Quick threading ball tension control
US4406424A · kind A · utility
Inventor
Key dates
| Filing date | Aug 11, 1982 |
| Grant date | Sep 27, 1983 |
| Priority date | — |
| Expiry date | Aug 11, 2002 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65H2701/31
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A ball type yarn tensioning device is disclosed which includes in side by side juxtaposition a ball chamber and a threading chamber. An elongated, vertical aperture is provided between the two chambers to permit the passing therethrough of a yarn threading instrument for threading purposes. After the yarn tensioning device is threaded, the yarn will follow an inclined path from the bottom of the ball chamber, through the aperture and out of the top of the threading chamber. The ball chamber terminates downwardly in a bottom insert which provides a seat for a ball within the ball chamber for yarn tensioning. The threading chamber terminates upwardly in a top insert to resist abrasion by a running yarn. Preferably, the threading chamber is downwardly open to permit lint and other debris to continuously drop from the device in an unobstructed manner.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.