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:
Nov. 13, 1984
Filed:
Mar. 15, 1982
John C Lewis, Dundas, CA;
Park-Ohio Industries, Inc., Shaker Heights, OH (US);
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.