(under subclass 158) Processes which are drawn to a particular manipulative procedure of adding a nonfibrous material to pulp or a wet web, sheet or article.
(1) Note. This and indented subclass are intended to be the collecting place for disclosures of particular manipulative procedures for incorporating a nonfibrous additive with the fibers during manufacture of fibrous webs or articles which procedures are or appear of general application to various types of additives. Since most processes specifically identify the additive which is generally provided for in a prior subclass, many of the patents herein are cross references from previous subclasses, particularly subclasses 159 to 181.
