Patent US3766353A successfully refreshed from Google Patents.
US3766353A
Expired / Lapsed
US
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Apparatus for the induction heating of metal sheets and process for heating such metal sheets
Assignee: Elphiac SA
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Filing: 1972-01-12
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Granted: 1973-10-16
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Expires: 1992-01-12
Abstract
Abstract An apparatus for the induction heating of metal sheets. The apparatus comprises generally an alternating current generator, an inductor connected to the generator, and a guideway for the metal sheets to be heated passing through the inductor in a direction such that the lines of force of the magnetic field are parallel to the guideway and to themselves inside the guideway. The inductor is made in the form of a curved loop having two arms and surrounding the guideway. The loop consists of at least one main portion in which the area located between the two arms is crossed by the guideway and at least two secondary portions which are parallel to the lateral edges of the guideway and run along such lateral edges at a predetermined distance therefrom. The process for carrying out the heating of the metal sheets consists in passing the sheets inside the guideway through the inductor.
Inventors
- 👤 Andre Barbieux
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 13:08
CPC Classifications
H; H05; H05B; H05B6/00; H05B6/02; H05B6/10; H05B6/101; H05B6/103; H05B6/104; H05B6/36; H05B6/362
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
194 words
Apparatus for the induction heating of metal sheets comprising an alternating current generator, an inductor connected to said generator, a guideway for a metal sheet to be heated passing through said inductor in a direction such that the lines of force of the magnetic field are parallel to the guideway and to themselves inside said guideway, characterized in that the inductor comprises a curved loop having two arms and surrounding said guideway, said loop consisting of at least one main portion in which the area located between said two arms is crossed by the guideway; at least two secondary portions which are parallel to the lateral edges of said guideway and run along said lateral edges at a predetermined distance therefrom; one said secondary portion being adjacent to each extremity of each said main portion; and the main portion of the inductor consisting of flat strips of metal of which the flat strip sides face the guideway, each said flat strip having a median part shorter than the breadth of the guideway disposed close to the guideway and end parts bent to a greater distance from the guideway and connected to said secondary portions.
Claim 2
Dependent Claim
194 words
Apparatus for the induction heating of metal sheets comprising an alternating current generator, an inductor connected to said generator, a guideway for a metal sheet to be heated passing through said inductor in a direction such that the lines of force of the magnetic field are parallel to the guideway and to themselves inside said guideway, characterized in that the inductor comprises a curved loop having two arms and surrounding said guideway, said loop consisting of at least one main portion in which the area located between said two arms is crossed by the guideway; at least two secondary portions which are parallel to the lateral edges of said guideway and run along said lateral edges at a predetermined distance therefrom; one said secondary portion being adjacent to each extremity of each said main portion; and the main portion of the inductor consisting of flat strips of metal of which the flat strip sides face the guideway, each said flat strip having a median part shorter than the breadth of the guideway disposed close to the guideway and end parts bent to a greater distance from the guideway and connected to said secondary portions.
Claim 3
Dependent Claim
204 words
Apparatus for the induction heating of metal sheets comprising an alternating current generator, an inductor connected to said generator, a guideway for a metal sheet to be heated passing through said inductor in a direction such that the lines of force of the magnetic field are parallel to the guideway and to themselves inside said guideway, characterized in that the inductor comprises a curved loop having two arms and surrounding said guideway, said loop consisting of at least one main portion in which the area located between said two arms is crossed by the guideway; at least two secondary portions which are parallel to the lateral edges of said guideway and run along said lateral edges at a predetermined distance therefrom; one said secondary portion being adjacent to each extremity of each said main portion; and the main portion of the inductor consisting of flat strips of metal of which the flat sides face the guideway, said flat strips being disposed in parallel planes and having metal bars shorter than the breadth of the guideway fixed on a median part of each strip on the sides of the strips facing the guideway, the extremities of said flap strips being connected to said secondary portions.
Claim 4
Dependent Claim
204 words
Apparatus for the induction heating of metal sheets comprising an alternating current generator, an inductor connected to said generator, a guideway for a metal sheet to be heated passing through said inductor in a direction such that the lines of force of the magnetic field are parallel to the guideway and to themselves inside said guideway, characterized in that the inductor comprises a curved loop having two arms and surrounding said guideway, said loop consisting of at least one main portion in which the area located between said two arms is crossed by the guideway; at least two secondary portions which are parallel to the lateral edges of said guideway and run along said lateral edges at a predetermined distance therefrom; one said secondary portion being adjacent to each extremity of each said main portion; and the main portion of the inductor consisting of flat strips of metal of which the flat sides face the guideway, said flat strips being disposed in parallel planes and having metal bars shorter than the breadth of the guideway fixed on a median part of each strip on the sides of the strips facing the guideway, the extremities of said flap strips being connected to said secondary portions.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-10-15 | 1977-04-16 | 1977-10-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-15 | 1981-04-16 | 1981-10-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-15 | 1985-04-16 | 1985-10-16 | $7700.00 | Window Closed / Lapsed |