US PATENT SUBCLASS 29 / 81.01
SCALE REMOVER OR PREVENTOR

Current as of: June, 1999
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29 /   HD   METAL WORKING

81.01SCALE REMOVER OR PREVENTOR {9}
81.02  DF  .~> For hollow workpiece {1}
81.03  DF  .~> Rolling deformation or deflection {1}
81.05  DF  .~> With rotary head
81.06  DF  .~> Fluid impingement {3}
81.1  DF  .~> Chainer
81.11  DF  .~> Scraper or scalper
81.12  DF  .~> Brush type
81.13  DF  .~> Mechanically powered operator {3}
81.17  DF  .~> Hand tool

DEFINITION

Classification: 29/81.01

SCALE REMOVER OR PREVENTOR:

(under the class definition) Process or apparatus for removing metallic oxide, sulfide, or a similar metallic surface deposit from metal article, strip, sheet, and bar or for preventing such a surface deposit from building up.

(1) Note. The scale removed from the metal is not foreign matter as removed by the apparatus of Class 15, Brushing, Scrubbing, and General Cleaning, but is a surface deposit having a metallic component such as magnetic oxide formed on the surface of iron when heated for processing.

(2) Note. Preventing metallic surface deposits by modifying environment in contact with metal is classified elsewhere.

(3) Note. Removal must be by mechanical means.

SEE OR SEARCH CLASS

15, Brushing, Scrubbing, and General Cleaning, for related apparatus, particularly,

77, and 88 for brushing machines for sheets, bars, and plates.

72, Metal Deforming, 39, and 40 for a step or means for performing the separation or removal from the work material of all substances which may be present thereon and distinguishable from the work material, per se, before, during, or after the deforming operation.

83, Cutting,

168, for device under the class definition wherein means are provided to remove foreign matter from the work or tool.

114, Ships,

222, for devices adapted to cleaning, painting, or scraping a ship's hull or preventing the growth and deposit of foreign matter thereon.

118, Coating Apparatus,

72+, for apparatus for combined cleaning and coating of metal.

134, Cleaning and Liquid Contact With Solids, for a miscellaneous process of cleaning metal including metal pickling.

148, Metal Treatment, appropriate subclasses for cleaning or pickling processes combined with significant heat treatment of metal to modify or maintain the internal physical structure (i.e., microstructure) or chemical properties of metal. See the Class 148 definition for a description of what constitutes significant heat treatment.

205, Electrolysis: Processes, Compositions Used Therein, and Methods of Preparing the Compositions,

210+, for combined processes of metal cleaning and electrolytic methods of cleaning metal. 228, Metal Fusion Bonding,

164+, for a process for preparing metal parts for joining.

422, Chemical Apparatus and Process Disinfecting, Deodorizing, Preserving, or Sterilizing,

7+, for preventing metallic surface deposits by modifying environment in contact with metal

451, Abrading, for a process or apparatus of cleaning by use of an abradant.

510, Cleaning, Compositions for Solid Surfaces, Auxiliary Compositions Therefor, or Processes of Preparing the Compositions, for cleaning compositions, including detergents, particularly

245+, for scale removing and metal cleaning compositions; this class also provides for processes involving the mere use of such compositions.