Collapsible winding core and method of making same
US7188800B2 · kind B2 · utility
4Cited by
15References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 23, 2004 |
| Grant date | Mar 13, 2007 |
| Priority date | — |
| Expiry date | May 20, 2025 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65H75/10
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A winding core capable of being made in relatively thick-walled configurations and yet capable of being readily collapsed into a flattened configuration for shipping or storage prior to use comprises a plurality of fibrous plies helically wound one atop another and adhered together to form a tube. The plies are arranged in two or more groups of two or more plies each. The plies of each group are adhered to one another over at least a substantial majority of their facing surfaces, but the adjacent groups are non-adhered to each other over at least a substantial majority of their facing surfaces.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.