Ball tension with improved threading means
US4470559A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 4, 1983 |
| Grant date | Sep 11, 1984 |
| Priority date | — |
| Expiry date | Apr 4, 2003 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65H2701/31
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A ball type yarn tensioning device with improved threading capability is disclosed. The device includes a ball chamber having an open top. The ball chamber terminates downwardly in a bottom insert which provides a seat for a ball within the ball chamber for yarn tensioning. A cap overfits the top of the ball chamber and includes a diametrically positioned, elongated opening. A top ceramic insert of elongated rounded configuration is secured about the elongated top opening and the yarn passes therethrough. The elongated configuration facilitates threading the device by permitting a threading instrument to be inserted through the ceramic insert and the bottom insert in slanted orientation that is angularly offset from the longitudinal axis of the device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.