(under subclass 69) Subject matter wherein said material is kneaded within a plurality of mixing chambers.
(1) Note. Mixing chambers which are in communication with each other so that material may flow from one chamber to another will be placed in this subclass. Moreover, the communication may be by means of a conduit, or through a conduit, or through or across a portion separating the chambers.
SEE OR SEARCH THIS CLASS, SUBCLASS:
290+, for stirrer within at least one of intercommunicating adjacent mixing chambers of general utility.
