Disposable fluted paperboard plates and method of making same
US9555594B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 16, 2007 |
| Grant date | Jan 31, 2017 |
| Priority date | — |
| Expiry date | Aug 4, 2032 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB31B2120/70
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A paperboard plate such as a paper plate includes a generally planar bottom portion, an upwardly and outwardly extending fluted sidewall, wherein the sidewall comprises a plurality of sidewall flutes substantially around the outer perimeter of the plate to define a fluted perimeter. The flutes are suitably present at fewer than 3.5 flutes per inch; the plate has a radial profile with a single transition; and the diameter/flute length ratio is greater than 6. The plates are formed in a punch-through die cutting and forming tool from a plurality of paperboard web layers at increased productivities as compared with conventional heated press-forming.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.