(under subclass 6) Processes which include treating work (such as bottles, tubes, or other work having cavities or other interior surfaces) by application of the solid treating agent to the interior surfaces.
SEE OR SEARCH THIS CLASS, SUBCLASS:
7, where the solid treating agent is in particulate or comminuted form.
22.1+, for processes of treating interior surfaces of hollow work not involving the use of a solid work treating agent.
SEE OR SEARCH CLASS
15, Brushing, Scrubbing, and General Cleaning, for apparatus for cleaning hollow articles by means of an air blast and/or suction, particularly
304, 316+, 395, and 406+ for apparatus for introducing a brush or wiper into the interior of hollow articles particularly subclasses 22.1+, 56+, 101, and for apparatus for cleaning tubular work by the passage therethrough of a solid or comminuted cleaning instrumentality carried in a fluid stream, see subclasses 3.5+. 34, Drying and Gas or Vapor Contact With Solids,
104+, and 437+ for processes and apparatus for treating hollow work.
