(under subclass 39) Subject matter comprising a step of, or means for, effecting engagement of work material with solid substance with sufficient force to remove or facilitate removal of scale, dirt, or other undesired substance from the surface of the work material.
(1) Note. The solid substance may be a specific cleaning tool, such as a scraper or brush, or it may be an abrasive medium as in sandblasting, or contact with other work as in tumbling, or a metal deforming tool (and see (2) Note below).
(2) Note. The claimed removal of scale by deflection or deformation of work material, as in stretching, hammering, or edge rolling, is subject matter for this subclass.
SEE OR SEARCH THIS CLASS, SUBCLASS:
53, for shot-blasting of metal work to deform same.
253.1+, for dross removal associated with method or apparatus for extrusion.
SEE OR SEARCH CLASS
15, Brushing, Scrubbing, and General Cleaning, for brushing, scrubbing, and general cleaning apparatus. 29, Metal Working,
81.01+, for a scale remover or preventer.
451, Abrading, for cleaning by use of an abradant.
