Post-press embossing of a consolidated man-made board
US4073672A · kind A · utility
6Cited by
10References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 27, 1976 |
| Grant date | Feb 14, 1978 |
| Priority date | — |
| Expiry date | Sep 27, 1996 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/24603
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A consolidated man-made board, such as hardboard, is wetted on one surface with a chemical, such as ammonium hydroxide, and thereafter embossed with a contoured embossing plate at a pressure of at least about 1000 p.s.i., at a temperature in the range of about 400.degree.-550.degree. F. and for a period of time sufficient to permanently reshape the surface of the consolidated board. The use of chemical wetting agents including ammonium hydroxide, mineral acids including hydrochloric, sulfuric, nitric and phosphoric acids, oxalic acid, and metheneamine is disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.