(under the class definition) Apparatus restricted to operating on hollow articles.
(1) Note. The patents on apparatus for hollow articles include means for introducing and/or withdrawing from the interior of the article either the treating medium or the means for handling the article. Apparatus restricted to
treating hollow cakes or bobbins of strands is in this subclass or indented subclasses.
(2) Note. Devices of more general application claiming a hollow article by name only are classified in appropriate subclasses below, for instance, racks for hose or strands, for which see subclasses 151 and appropriate indented subclasses, and 239.
(3) Note. For gas or vapor delivery means insertable into bulk material, search this class, subclass 243 and Class 454, Ventilation, subclasses 175+.
(4) Note. Complete the search in this class, apparatus subclass 103 and process subclasses 437+, and see the notes thereto.
(5) Note. See this class, subclass 202 where articles, particularly shoes, are inserted into openings in a treating chamber. SEE OR SEARCH CLASS
8, Bleaching and Dyeing; Fluid Treatment and Chemical Modification of Textiles and Fibers,
150+, and 451.
12, Boot and Shoe Making, appropriate subclasses for forms inserted in shoes, and particularly
129.4, for heated forms.
68, Textiles: Fluid Treating Apparatus,
150,.
427, Coating Processes,
230+, for processes of coating the interior of a hollow article.
432, Heating,
224, for an in an inserted emitter type of hollow article interior heater.
