Containers formed of a composite paperboard web and methods of forming
US6039682A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 20, 1997 |
| Grant date | Mar 21, 2000 |
| Priority date | — |
| Expiry date | Nov 20, 2017 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB32B2439/00
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
Composite paperboard containers formed from a first substantially planar sheet of paperboard material having a content contacting surface and a back surface, a first embossed sheet of paperboard material having a plurality of raised portions adhered to the back surface of the first planar sheet and a second embossed sheet of paperboard material having a plurality of raised portions adhered to the first embossed sheet of paperboard material. Additional planar sheets or embossed sheets may be added as desired in order to achieve the desired flexural stiffness and thermal resistance. Such containers being in the form of cups, plates, bowls or trays and formed by providing the substantially planar sheet of paperboard material, forming the planar sheet of paperboard material into a container shell, providing a first embossed sheet of paperboard material having raised portions and adhering the raised portions of the first embossed sheet of paperboard material to the planar sheet of paperboard material, providing a second embossed sheet of paperboard material having raised portions and adhering the raised portions of the second embossed sheet of paperboard material to the first embossed s…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.