(under subclass 407) Coating apparatus having means to apply coating material to the inside surfaces only of a hollow article which inside surfaces support or retain a batch of coating material against gravity.
(1) Note. Apparatus for coating the inside of a hollow work piece by merely immersing the entire object in coating material is excluded from this subclass, and may be found in appropriate subclasses set forth below.
(2) Note. In this subclass may be found, for example, devices for coating the inside of a hollow work piece such as a container in which the container is filled with coating material then inverted to drain off the surplus coating material, leaving a film of coating material on the inside of the hollow work piece.
SEE OR SEARCH THIS CLASS, SUBCLASS:
254, for other coating devices for applying a coating to the inside of a hollow work piece; and see the notes thereto.
406, for apparatus of the immersion or work confined pool type for coating the inside surface of a hollow work piece in which the outer surface is masked or protected, and the entire work piece is immersed in a pool of coating material.
423+, for apparatus for moving a hollow article bodily into an immersion pool to coat the inside surfaces. SEE OR SEARCH CLASS
134, Cleaning and Liquid Contact With Solids,
150, for apparatus there provided, in which the work is of a
receptacle form, the receptacle form work constituting the sole treating liquid holding means.
