Intermittent coating process and an apparatus therefor with adjustment of spacing between coating roll and adjuster
US5523122A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Sep 9, 1994 |
| Grant date | Jun 4, 1996 |
| Priority date | — |
| Expiry date | Sep 9, 2014 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB05C1/165
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
The distance between a D-roll and a C-roll is switched at proper time intervals between two stages in which the distance is larger or smaller. A thicker coating layer on the C-roll with the thickness controlled by the larger distance between the D-roll and the C-roll is transferred onto a base sheet in a condition in which the C-roll and a B-roll are in contact with each other with the base sheet interposed therebetween. The distance between the C-roll and the B-roll is increased when a thinner coating layer on the C-roll with the thickness controlled by the smaller distance between the D-roll and the C-roll reaches a transfer position, so that the coating layer is not transferred onto the base sheet. A local increase of the amount of the coating material applied at the end of a coating area can be prevented, and the thickness of the coating material applied can be controlled to be constant with high accuracy over the entire coated area.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.