.~ Continous strip, strand or web passed longitudinally through heating zone
(under subclass 1) Process including the step of passing a continuous strip, strand, web or sheet longitudinally through a heating zone.
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59, for heating structure with means winding, coiling or flexing a longitudinally moving sheet, web or strand.
122, for heating structure including means for manipulating, orienting, segregating or topically heating an individual article; and
231, for heating apparatus including a heat generator and means engaging and retaining an article in a desired relationship to the heat generator.
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34, Drying and Gas or Vapor Contact With Solids, 444+, for a process of drying a sheet, web or strand by contact with gas or vapor and subclasses 519+ for a process of drying a sheet, web or strand by radiant or conducted heat.
148, Metal Treatment, appropriate subclasses for processes of heat treating metal to modify or maintain the internal physical structure (i.e., microstructure) or chemical properties of metal. If metal casting, fusion bonding, machining, or working is involved, there is a requirement of significant heat treatment as described in the Class 148 Class Definition. Class 148
568, 576, and 595 through 600 relate to treatment of wire and subclasses 601 through 603, 657, and 661 relate to treatment of strips.