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. 24, 1987
Filed:
Jul. 08, 1986
Thomas R Lawall, Emmaus, PA (US);
Stephen A Lukacz, Nazareth, PA (US);
Fuller Company, Bethlehem, PA (US);
Abstract
An improved apparatus for roasting fine material which includes recirculation of at least partially roasted material through the roasting furnace for further roasting. An adjustable gate is included in the recirculation system for controlling the quantity of material recirculated. A high temperature fluidizing gravity conveyor is used in the recirculation system to maintain a low profile for the system. The invention utilizing a system for classifying large particles so that they may be removed from the recirculation system. Gas locks are included for preventing the short circuiting of hot gases. The system also includes overflow conduit in the event of a plug or blockage in the system.