D21D 1/12

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Description

Class  D21D : TREATMENT OF THE MATERIALS BEFORE PASSING TO THE PAPER-MAKING MACHINE


Subclass 1/12: Methods of beating or refining; Beaters of the Hollander type (knotter screens D21F) Methods of beating; Beaters of the Hollander type Beaters with means for continuous pulp discharge

Recent Patents

Patent #TitleFiling DateIssue DatePatent Owner
7846294 Method of refining destructured chipsNov 16, 07Dec 07, 10ANDRITZ INC.

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