Thread braking mechanism
US4535956A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 4, 1984 |
| Grant date | Aug 20, 1985 |
| Priority date | — |
| Expiry date | Sep 4, 2004 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65H2701/31
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
In a housing, two rollers having substantially parallel axes are freely rotatably journaled and bound between them a clamping bite. The thread to be braked is drawn through the clamping bite and thereby drives the rollers. A first of the two rollers is stationarily mounted in the housing. The second roller comprises a cover made of a rubber-elastic material. This second roller is journaled in a pivotable forked lever which is under the action of an angle lever. The second roller can be pressed against the stationary first roller with an adjustable operating bias by means of the angle lever and a force accumulator constituted by a tension spring. Spring means of a rapid braking device constitute a compression spring supported by a braking rod which is axially displaceable between two end positions. The compression spring acts upon a spring bush carrying a nose member. In one of the two end positions of the braking rod the nose member extends with play beneath an arm of the angle lever. In another one of the two end positions of the braking rod the nose member additionally transmits to this arm of the angle lever the force of the compression spring in order to initiate a rapid brakin…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.