Semi-corrugated paperboard panels and method for production of same
US11938705B1 · kind B1 · utility
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1References
2Claims
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Key dates
| Filing date | Sep 7, 2023 |
| Grant date | Mar 26, 2024 |
| Priority date | — |
| Expiry date | Sep 7, 2043 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB32B2439/62
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A means of making a multi ply structural panel by eliminating the top liner in the corrugating process. The present invention is made possible through modification to the corrugating rolls of the singlefacer. The design modification to the rolls involves incorporation of slots that run around the circumference of one roll and mating creasing tools incorporated around the circumference of the other of the corrugated roll set. These slots and creasing tools are incorporated across the existing flutes of the corrugating rolls.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.