Core and a method of manufacturing such
US6159564A · kind A · utility
1Cited by
3References
19Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 10, 1998 |
| Grant date | Dec 12, 2000 |
| Priority date | — |
| Expiry date | Sep 10, 2018 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/1303
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A method of manufacturing a core, especially a spiral core, from superimposed plies of board produced by winding, gluing, and drying them, is provided. The method is practiced so that the moisture content of at least some of the board plies entering the winding stage differ from each other in order to provide a stepwise moisture structure within the core wall. This decreases unfavorable stresses which are produced in the drying stage if a core is manufactured from plies having equal moisture content.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.