Induction heating system for 360 degrees curing of can body coatings

(19)

(11)

EP 0 742 680 A3

(12)	EUROPEAN PATENT APPLICATION

(88)	Date of publication A3:
	23.04.1997 Bulletin 1997/17

(43)	Date of publication A2:
	13.11.1996 Bulletin 1996/46

(21)	Application number: 96303035.8

(22)	Date of filing: 30.04.1996

(51)	International Patent Classification (IPC)⁶: H05B 6/02, H05B 6/36

(84)	Designated Contracting States:
	CH DE FR GB IT LI

(30)

Priority:

10.05.1995 US 438881

(71)	Applicant: NORDSON CORPORATION
	Westlake, Ohio 44145-1119 (US)

(72)	Inventors:
	Sprenger,Barbara Felton, California (US) Sprenger,Robert A. deceased (US) Gacka,Mark G. Lakewood, Ohio (US)

(74)	Representative: Findlay, Alice Rosemary et al
	Lloyd Wise, Tregear & Co., Commonwealth House, 1-19 New Oxford Street London WC1A 1LW London WC1A 1LW (GB)

(54)	Induction heating system for 360 degrees curing of can body coatings

(57) A method and apparatus for 360° induction heating of a can body to cure or partially cure a protective coating applied thereto. The can bodies are inductively heated by placing them in a medium frequency, oscillating magnetic field generated by a multiple turn induction coil helically wound around the transport path of the can body. By using a medium-frequency field and by centering the can bodies with respect to the induction coil, the can bodies may be evenly and uniformly heated around 360° of their circumference.

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