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:
Jan. 01, 1991
Filed:
Jun. 22, 1989
Robert E Rackerby, San Diego, CA (US);
Jon L Zimmerman, Escondido, CA (US);
Unisys Corporation, Blue Bell, PA (US);
Abstract
A given target temperature profile T is produced in a workpiece as it passes through an elongated passageway of a belt furance by the steps of: (1) determining a set of temperature setting TS.sub.X for the belt furnace thermostats which satisfy an equation f(.alpha.,TS.sub.X,CF.sub.Y).apprxeq.T where .alpha. is a set of thermal parameters for the workpiece, CF.sub.Y is a set of correction factors, and f( ) is a function which approximates the temperature of said workpiece based on TS.sub.X,.alpha., and CF.sub.Y ; (2) measuring an actual temperature profile A(TS.sub.X) of the workpiece in the furnace with the heater thermostats at the settings TS.sub.x ; (3) terminating if the measured actual temperature profile A(TS.sub.X) matches the target temperature profile T within a predetermined tolerance; otherwise, (4) determining a new set of correction factors which satisfies an equation f(.alpha.,TS.sub.X,CF.sub.Y)=A(TS.sub.X); and thereafter repeating the above steps.