Method and apparatus for controlling a coating head, and a coating head
US9393593B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 25, 2010 |
| Grant date | Jul 19, 2016 |
| Priority date | — |
| Expiry date | Feb 1, 2032 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD21H23/78
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A method and apparatus are described for controlling a coating head, which exerts a nip pressure to a fibrous web to be coated while the fibrous web is supported by a backing roll. An output signal of a sensor integrated within the backing roll is read, thus producing a measured indication of the nip pressure. A number of actuator control values are derived at least partly from said measured indication of the nip pressure. Said actuator control values are delivered as commands to a number of respective actuators that contribute to creating the nip pressure, to control an amount of a coating substance on the fibrous web in the coating head.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.