Rigid-when-wet paperboard containers and their manufacture
US4096305A · kind A · utility
9Cited by
7References
1Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 14, 1975 |
| Grant date | Jun 20, 1978 |
| Priority date | — |
| Expiry date | Apr 14, 1995 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31949
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
Rigid-when-wet, but foldable, corrugated paperboard and process of making same by applying phenolic resin to contiguous surfaces of the outer liner, the medium, and the inner liner without substantially altering the hygroscopicity of the exposed faces of the liners, and adhering the three components together before the resin is cured.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.