Claims
- 1. A method of coating a web traveling in a predetermined downstream direction comprising passing a stream of coating material through an opening to form a layer on said web, thereafter passing said material through a first convergent pressure zone and then through a second divergent pressure zone, and supporting said web by a back-up roll in said zones, and wherein said material fills said first and second zones.
- 2. The method of claim 1, wherein said web is traveling continuously.
- 3. The method of claim 1, wherein said material is a liquid.
- 4. The method of claim 1, wherein said opening is a slit extending transversely of said direction.
- 5. The method of claim 4 wherein said slit has an upstream edge and a downstream edge.
- 6. The method of claim 1, further comprising passing said material through a third convergent pressure zone downstream of said second zone.
- 7. The method of claim 1, further comprising passing said material through a plurality of successive alternate convergent and divergent pressure zones.
- 8. The method of claim 1, wherein said material flows through said opening in the direction of the center of said roll.
Priority Claims (1)
Number |
Date |
Country |
Kind |
57-83221 |
May 1982 |
JPX |
|
Parent Case Info
This application is a continuation of Application Ser. No. 492,456, filed May 5, 1983, now abandoned.
US Referenced Citations (7)
Continuations (1)
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Number |
Date |
Country |
Parent |
492456 |
May 1983 |
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