The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 29, 1977
Filed:
Jan. 12, 1976
Paul Weber, Oelde, DT;
Hans Mollenkopf, Neubeckum, DT;
Kurt Henning, Neubeckum, DT;
Otto Heinemann, Ennigerloh, DT;
Heinz-Herbert Schmits, Rheda, DT;
Wolfgang Rother, Stromberg, DT;
Horst Ritzmann, Enniger, DT;
Jurgen Wurr, Enniger, DT;
Karl Krutzner, Jr, Neubeckum, DT;
Werner Schossler, Ahlen, DT;
Wolf Goldmann, Enniger, DT;
Georg Schepers, Enniger, DT;
Polysius AG, Neubeckum, DT;
Abstract
Fine-grained material such as raw ground cement adapted to be fired in a rotary tube furnace is introduced to a vertical preheater and falls through a heating zone located at a level below the level at which the material enters the preheater. A stream of air enters the preheater at a level below the heating zone and passes upwardly at sufficient velocity to entrain the material that has passed through the heating zone, thereby causing such material to pass again through the heating zone. From the preheater the material is delivered to the furnace for final firing.