Process and apparatus for making a continuous web of fibrous material
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Aug 2, 2022
Grant Date -
Mar 11, 2021
app pub date -
Feb 22, 2018
filing date -
Feb 22, 2017
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A process for making a continuous web of a longitudinally corrugated fibrous material includes passing the web between a rigid cylinder having circumferential grooves that are flanked and shaped to define a substantially corrugated profile on substantially on the entire thickness of the web, and a presser which has an external layer made of an elastically compressible material and which is maintained adherent to the rigid cylinder so as to cause the continuous web to penetrate into the grooves and thus obtain the corrugations, At the same time, the continuous web is subjected to a reduction of the speed of the surface in contact with the presser with respect to the speed of the surface in contact with the rigid cylinder so as to have a longitudinally corrugated pattern on both surfaces and transverse ripples at least at the corrugated surface that was in contact with the rigid cylinder.
First Claim
Other Claims data not available
Family
International Classification(s)
- 2018 Application Filing Year
- B31F Class
- 112 Applications Filed
- 78 Patents Issued To-Date
- 69.65 % Issued To-Date
Cited Art Landscape
Patent Citation Ranking
- 0 Citation Count
- B31F Class
- 0 % this patent is cited more than
- 3 Age
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