US PATENT SUBCLASS 219 / 470
.~.~.~ With plural heating units

Current as of: June, 1999
Click HD for Main Headings
Click for All Classes

Internet Version by PATENTEC © 1999      Terms of Use


219 /   HD   ELECTRIC HEATING

200  DF  HEATING DEVICES {14}
385  DF  .~ Combined with container, enclosure, or support for material to be heated {12}
469  DF  .~.~ Cylindrical or roller-type support for material to be heated {2}
470.~.~.~ With plural heating units

DEFINITION

Classification: 219/470

(under subclass 469) Subject matter including at least a plurality of heating units. The heating units may be contained in or associated with a single roller or may be distributed among a plurality of rollers.

SEE OR SEARCH THIS CLASS, SUBCLASS:

476+, for plural separate and distinct heating devices under the class definition in general.

SEE OR SEARCH CLASS

34, Drying and Gas or Vapor Contact With Solids,

113+, for plural rolls in which the material to be dried is external of the roll structure.

38, Textiles: Ironing or Smoothing, 49+, for smoothing apparatus comprising plural cooperating rolls and subclass 101 for plural roller presser, per se.

72, Metal Deforming,

200+, for metal rolling apparatus with means for heating or cooling the rolls.

118, Coating Apparatus,

60, for coating apparatus utilizing heated roll means for heat exchange and which may include plural rolls or plural heater.

165, Heat Exchange,

89+, for rotary drum heating surfaces.