Apparatus for simultaneously heating a plurality of elongated wo

Details Apparatus for simultaneously heating a plurality of elongated wo Apparatus for simultaneously heating a plurality of elongated wo

1982-03-15

1984-11-13

Albritton, C. L.

Electric heating

Metal heating

Of cylinders

219 1077, 219 1043, H05B 906

Patent

active

044827938

ABSTRACT:
A device for inductively heating simultaneously and alike a plurality of identical elongated workpieces each having at least two axially spaced portions, to produce identical predetermined heat profiles in the workpiece throughout their longitudinal extents. The workpieces are conveyed at a predetermined uniform speed along work paths extending in a linear direction. A plurality of like multi-turn induction heating coils are coaxially disposed along the work paths and connected to a two-level power source. A reciprocal stop aligns the leading ends of the workpieces along the feed paths relative to the heating coils. The coils are at a first level of energization adapted to inductively heat the first axial portion of the respective workpieces identically to the same predetermined temperature as they pass through the coils. After a predetermined time interval during the heating cycle, triggered by the action of the stop, the coils are automatically placed at the other level of energization to inductively heat the second axial portion of the respective workpieces identically.

REFERENCES:
patent: 1690612 (1928-11-01), Anderson
patent: 1764068 (1930-06-01), Crook
patent: 2281850 (1942-05-01), McKinney
patent: 2490104 (1949-12-01), Strickland
patent: 3489620 (1970-01-01), Current
patent: 3743808 (1973-07-01), Kasper
patent: 3784780 (1974-01-01), Laughlin et al.
patent: 4093839 (1978-06-01), Moliterno et al.
patent: 4289944 (1981-09-01), Reese
patent: 4418259 (1983-11-01), Lewis
patent: 4420667 (1983-12-01), Lewis
patent: 4433226 (1984-02-01), Wagar

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