Electric heating – Inductive heating – With power supply system
Reexamination Certificate
2006-04-25
2006-04-25
Leung, Philip H. (Department: 3742)
Electric heating
Inductive heating
With power supply system
C219S601000, C219S628000, C219S660000
Reexamination Certificate
active
07034263
ABSTRACT:
A system and method for inductive heating, in which a power source provides current pulses with high-frequency harmonics to a heater coil, the coil generating a magnetic flux for inductive heating of an article. The high-frequency harmonics enhance a relative proportion of inductive heating, compared to resistive heating of the heater coil. Providing these high-frequency harmonics, occurring above the border frequency of the heating system, enables the system to deliver an increased proportion of inductive heating, compared to resistive heating, without requiring an increase in the Root Means Square (RMS) current in the coil. Providing better coupling between the coil and the core, such as by embedding the coil wholly or at least partially in the core, and providing a magnetic yoke to close the loop with the core, can provide a significantly decreased border frequency. This reduction of the border frequency then can be utilized to provide larger amounts of energy in the high-frequency harmonics of the current pulses, and thus provide a greater percentage of inductive heating without increasing the current in the coil. The current pulses preferably have steeply varying portions, such as a steeply varying leading edge and/or trailing edge.
REFERENCES:
patent: 1771918 (1930-07-01), Fry
patent: 2163993 (1939-06-01), Dufour
patent: 3436641 (1969-04-01), Biringer
patent: 3436642 (1969-04-01), Segsworth
patent: 3440384 (1969-04-01), Schroeder
patent: 3639782 (1972-02-01), Lord
patent: 3708645 (1973-01-01), Osborn
patent: 4017701 (1977-04-01), Mittelmann
patent: 4025864 (1977-05-01), Kennedy
patent: 4085300 (1978-04-01), MacKenzie et al.
patent: 4151387 (1979-04-01), Peters, Jr.
patent: 4211912 (1980-07-01), Kiuchi
patent: 4277667 (1981-07-01), Kiuchi
patent: 4289946 (1981-09-01), Yarwood et al.
patent: 4290039 (1981-09-01), Tochizawa
patent: 4355222 (1982-10-01), Geithman
patent: 4473732 (1984-09-01), Payne
patent: 4589059 (1986-05-01), Tanino
patent: 4733342 (1988-03-01), Mueller
patent: 4798926 (1989-01-01), Sakai
patent: 4814567 (1989-03-01), DeAngelis
patent: 5053593 (1991-10-01), Iguchi
patent: 5183985 (1993-02-01), Sidky et al.
patent: 5216215 (1993-06-01), Walker
patent: 5294769 (1994-03-01), Nishi et al.
patent: 5331127 (1994-07-01), Chen
patent: 5343023 (1994-08-01), Geissler
patent: 5414247 (1995-05-01), Geithman
patent: 5444229 (1995-08-01), Rudolph
patent: 5789721 (1998-08-01), Hayashi
patent: 5847370 (1998-12-01), Sluka et al.
patent: 5854473 (1998-12-01), Malnoe
patent: 6043635 (2000-03-01), Downey
patent: 6393044 (2002-05-01), Fishman
patent: 6405785 (2002-06-01), Gellert
patent: 6465990 (2002-10-01), Acatrinei
patent: 6717118 (2004-04-01), Pilavdzic
patent: 6781100 (2004-08-01), Pilavdzic
patent: 2003/0121908 (2003-07-01), Pilavdzic et al.
patent: 752268 (1956-07-01), None
patent: 772424 (1957-04-01), None
patent: 02117088 (1990-05-01), None
patent: 02117089 (1990-05-01), None
patent: P2003-136559 (2003-05-01), None
patent: 03/001850 (2003-01-01), None
Stanley Zinn and S.L. Semiatin: “Coil design and fabrication: basic design and modifications,” (pp. 32-36), Heat Treating, Jun. 1988.
Stanley Zinn and S.L. Semlatin: “Coil design and fabrication: part 2, specialty coils”, (pp. 29-41), Heat Treating, Aug. 1988.
Stanley Zinn and S.L. Semiatin: “Coil design and fabrication: part 3, fabrication principles,” (pp. 39-41), Heat Treating, Oct. 1988.
Copy of Invitation to Pay Additional Fees and International Search Report mailed Dec. 13, 2004 in related application PCT/US2004/021533.
Induction Calender Profiler System Control Card Programmers' Manual, PCB version 1.0, Comaintel Inc., 2001.
Induction Calender Profiler System Operator's Manual, Comaintel Inc. 2001.
iTherm Technologies, LP
Kudirka & Jobse LLP
Leung Philip H.
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