Die coating on air supported shell
US11865571B2 · kind B2 · utility
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4References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 22, 2020 |
| Grant date | Jan 9, 2024 |
| Priority date | — |
| Expiry date | Dec 22, 2040 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD21G3/005
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
Methods and apparatuses for applying coatings on a moving web are provided. A coating die and a back-up roll engage with each other. The back-up roll includes a shell rotatably supported by a pressurized air layer. When a coating material is dispensed from the coating die onto the web to form a liquid coating, the pressure of the air layer is controlled such that the shell translates in space to balance forces from the air layer and the coating bead, while the web is being translated to drive the shell.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.