Method of manufacturing a non-metallic core having a perforated septum embedded therein
US4816097A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 5, 1988 |
| Grant date | Mar 28, 1989 |
| Priority date | — |
| Expiry date | Apr 5, 2008 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/24149
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A method of manufacturing a non-metallic honeycomb having a perforated septum embedded therein in a plane extending perpendicularly to cell walls of the honeycomb, the cell walls of the honeycomb each having discontinuous opposite outer edge surfaces, including the steps of protecting the cell walls with a protectant mixture applied to one of the outer edge surfaces; and laser drilling the septum with a plurality of laser beams originating from a point exterior to the cell walls opposite the covered edge surface in a direction parallel to said cell walls and perpendicular to the plane of the septum, the protectant mixture covering an area of the outer edge surface sufficient to prevent damage to the cell walls.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.