System and method for clean and priming extrusion head
US6488041B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 8, 1999 |
| Grant date | Dec 3, 2002 |
| Priority date | — |
| Expiry date | Jan 8, 2019 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB05C5/0254
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
The present invention relates to a system and method suitable for automatic cleaning of a coating or extrusion head of a coating apparatus. The invention includes a scrubbing station wherein a combination of physical contact and strong solvent solution combine to remove coating fluid from the exterior of an extrusion head. A second cleaning station, preferably a rinsing station then further cleans the head of coating fluid and removes solvent used at a first cleaning station. The solvent used at the rinsing station is preferably self-drying thereby obviating the need for any further cleaning action. The invention also provides for the ability to prime the coating bead at the extrusion head so as to have a fully formed bead ready before the head begins coating a substrate, thereby providing an even coating across said substrate. The priming operation preferably comprises holding the head steady over a rotating priming roller while extruding fluid preferably at a constant volumetric flow rate. The extrusion head is removed from the priming station when the coating bead is properly formed, and the extruded coating material is dissolved in a solvent bath at the priming station. The pri…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.