Methods for applying a liquid to a web
US7320814B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 19, 2003 |
| Grant date | Jan 22, 2008 |
| Priority date | — |
| Expiry date | Mar 15, 2026 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB05B12/126
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A method of spraying patterns on a web that includes directing at least one intermittent spray of liquid onto the web to form a pattern on the web; sensing a position of a leading edge of at least one of the spray and the pattern relative to one or more references on the web; generating a first correction signal when the leading edge is out of position; and adjusting the spray of liquid in response to the first correction signal to correctly position a leading edge of a subsequent pattern. The method further includes sensing a position of a trailing edge of at least one of the spray and the pattern relative to one or more references on the web; generating a second correction signal when the trailing edge is out of position; and adjusting the spray of liquid in response to the second correction signal to correctly position a trailing edge of subsequent patterns.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.