Expandable shaft having spiral shaped projections and it's use for winding elongated material
US6065715A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 1, 1996 |
| Grant date | May 23, 2000 |
| Priority date | — |
| Expiry date | Aug 1, 2016 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T279/1029
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
Expandable shaft for winding elongated material, especially soft paper and other nonwoven material. The shaft (10) has a number of radial openings (13) or grooves (22, 24) which house longitudinal blades (23), bars (11) or the like in such a way that these are movable by means of activating means (14, 15, 25) in a radial direction between a retracted and a projected position, whereby a variable effective diameter of the shaft is created. The radial openings (13) or grooves (22, 24) are arranged with a spiral formed inclination in the longitudinal direction of the shaft (10) and the retractable and projectable blades (23) or the bars (11) housed therein are arranged with a corresponding spiral form along the shaft.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.