(under subclass 79) Apparatus having means to melt or heat a normally solid substance which means includes either (1) a means to create an electric spark across spaced electrodes or (2) a heating medium disposed in a fluctuating electromagnetic field.
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3, 690+, for electrostatic charging of sprayed or projected fluids.
80, for electrically heated nozzles (e.g., by electric arc means) having plural means to supply normally solid material.
82, 83, for nozzle heaters, many of which are of the electrical resistance type.
