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:
Sep. 05, 2000
Filed:
May. 26, 1999
Donaldson J Emch, Brighton, MI (US);
PPG Industries Ohio, Inc., Cleveland, OH (US);
Abstract
A process for drying a liquid electrodeposited coating composition applied to a metal substrate is provided. Infrared radiation and warm air are applied simultaneously to the electrodeposited coating composition for a period of at least about 1 minute, the velocity of the air at the surface of the electrodeposited coating composition being less than about 4 meters per second. The temperature of the metal substrate is increased at a rate ranging from about 0.25.degree. C. per second to about 2.degree. C. per second to achieve a peak metal temperature of the substrate ranging from about 35.degree. C. to about 140.degree. C. Infrared radiation and hot air are applied simultaneously to the electrodeposited coating composition for a period of at least about 2 minutes, during which the temperature of the metal substrate is increased at a rate ranging from about 0.2.degree. C. per second to about 1.5.degree. C. per second to achieve a peak metal temperature ranging from about 160.degree. C. to about 215.degree. C., such that a dried electrodeposited coating is formed upon the surface of the metal substrate.