Extrusion die coating method
US7303782B2 · kind B2 · utility
3Cited by
3References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 30, 2004 |
| Grant date | Dec 4, 2007 |
| Priority date | — |
| Expiry date | Mar 5, 2026 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29L2031/60
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
Apparatus and a method for selectively vapor-coating an extrusion die to extrude honeycombs with desired distributions of web thicknesses, wherein at least one perforated impedance or preferential coating plate with a desired pattern of holes is positioned adjacent to, but spaced apart from, a face of the extrusion die to be coated, whereby a coating gas passed through the coating plate and into the die imparts a desired coating distribution to the extrusion die slots that is effective to closely control the web thickness distribution in honeycombs extruded therefrom.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.