Title: Dry refining process and apparatus

Abstract: A process and apparatus is disclosed for dry refining cellulosic pulp wherein the liberated fibers are structurally deformed and twisted without producing unwanted knots or fiber bundles. For the purposes of the invention, a disk refiner is used which is modified to include one or more air jets located at the periphery of the refiner housing. During refining, the refiner is provided with a cooling means, while air is introduced into the housing through the air jets to prevent fibers from becoming trapped between the ends of the refiner disks and the housing walls, thus preventing the formation of knots and fiber bundles.

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Inventors: Cavagna, Giancarlo A. (Silver Spring, MD, US)

Application Number: 001428
Filing Date: 1979-01-08
Publication_date: 1980-03-04
Assignee: Westvaco Corporation (New York, NY)
Primary Class(es): 241/17 241/18, 241/28, 241/261.2, 241/261.3
Other Classes:
US Patent Ref:

1795603	Mar, 1931	Hussey	241/261.
3596840	Aug, 1971	Blomquist et al.	241/28.
3802630	Apr, 1974	Lee et al.	241/18.

Other Refs:
Primary Examiner: Lazarus, Richard B.
Assistant Examiner:
Attorney: