(under subclass 209) Coating apparatus specialized or peculiarly adapted to enter or contact the inner surface of a cavity or hole within the confines of the work and apply a coating thereto.
(1) Note. Those patents which have apparatus to coat surfaces in addition to the inside surface only of the hollow work are cross-referenced to the appropriate subclasses for such apparatus.
SEE OR SEARCH THIS CLASS, SUBCLASS:
254, and see the notes thereto for other devices for applying a coating to the inside of a hollow work piece.
