heated without contact between combustion gases and charge; electrically heated

Full Title

Furnaces through which the charge is moved mechanically, e.g. of tunnel type (rotary-drum furnaces with means for agitating or moving the charge F27B7/14); Similar furnaces in which the charge moves by gravity > heated without contact between combustion gases and charge; electrically heated

Child Classifications

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• F27B 9/061
• F27B 9/062
• F27B 9/068
• F27B 9/08 heated through chamber walls
• F27B 9/10 heated by hot air or gas