(under subclass 329.1) Subject matter wherein an agitating element is intended to substantially engage and move relative to a wall of the mixing chamber.
SEE OR SEARCH THIS CLASS, SUBCLASS:
52, for a mortar-type mixer having a scraper for removing material from a mixing chamber.
67, for a scraper in a mortar-type mixer for removing material from the wall of a mixing chamber.
221, for a scraper for moving material away from a wall of a rotatable mixing chamber.
309+, for a mixing apparatus including a scraper or wiper formed of a flaccid material or of bristles.