Coating method and apparatus
US4490418A · kind A · utility
39Cited by
1References
9Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Apr 15, 1983 |
| Grant date | Dec 25, 1984 |
| Priority date | — |
| Expiry date | Apr 15, 2003 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB05D7/52
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A slide bead coating method and apparatus for applying a coating solution onto an advancing web includes an air compressed chamber for keeping a lower side of a solution bead in a pressure-applied condition to produce a difference in pressure between the upper side and the lower side of the solution bead to stabilize the bead. A coating solution which has a low viscosity and good wetting properties can thus be applied onto the web at high speeds and in a thin layer form, and a so-called bead-dropping phenomenon is avoided. Therefore, the preparation of a layer for photo-sensitive materials is facilitated.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.