Methods, apparatus, and chemical compositions for selectively coating fiber-based food containers
US11686050B2 · kind B2 · utility
0Cited by
32References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 23, 2019 |
| Grant date | Jun 27, 2023 |
| Priority date | — |
| Expiry date | Apr 20, 2040 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB05D2203/22
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
Methods and apparatus for vacuum forming and subsequently applying topical coatings fiber-based food containers. The slurry includes one or more of an embedded moisture barrier, vapor barrier, and oil barrier, and the topical coating comprises one or more of a vapor barrier, a moisture barrier, an oil barrier, and an oxygen barrier. For food containers having deep sidewalls, a spray coating system includes a first nozzle for applying a full cone spray pattern to the bottom surface of the container, and a second nozzle for applying a hollow cone spray pattern to the inside surfaces of the side walls.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.