.~ With plural or specified mechanical defibering step
DEFINITION
Classification: 162/28
(under subclass 1) Processes combined with (1) a plurality of separate and distinct attrition or defibering steps, or (2) a specifically defined attrition or defibering step.
(1) Note. Processes in which a defibering step subsequent to chemical treatment is claimed broadly as, for example, "defibering" "refining", "disintegrating", "comminuting", etc., are not classified in this subclass but are found in the appropriate subclass below, usually classified on the basis of the chemical treatment. Processes in which subsequent plural distinct defibering steps are included are classified herein even though the defibering steps are recited broadly.
SEE OR SEARCH THIS CLASS, SUBCLASS:
70+, for processes including a chemical treatment combined with a broadly recited single attrition step (see (1) Note).
234+, for digester apparatus combined with mechanical defibering means.
261, for other paper making apparatus combined with heating, refining and/or disintegrating means.
SEE OR SEARCH CLASS 241, Solid Material Comminution or Disintegration, appropriate subclasses for particular attrition processes and means, per se.
