Global Patent Index - EP 0964759 B1

EP 0964759 B1 2002-11-13 - METHOD AND APPARATUS FOR ELECTROMAGNETIC CONFINEMENT OF MOLTEN METAL

Title (en)

METHOD AND APPARATUS FOR ELECTROMAGNETIC CONFINEMENT OF MOLTEN METAL

Title (de)

VERFAHREN UND VORRICHTUNG ZUM ELEKTROMAGNETISCHEN EINDÄMMEN SCHMELZFLÜSSIGER METALLE

Title (fr)

PROCEDE ET APPAREIL POUR LE CONFINEMENT ELECTROMAGNETIQUE DE METAL EN FUSION

Publication

EP 0964759 B1 (EN)

Application

EP 98904896 A

Priority

  • US 9802092 W
  • US 3867197 P
  • US 1541998 A

Abstract (en)

[origin: WO9836861A1] A method and apparatus for electromagnetic confinement of molten metal during strip casting of molten metal between two belts that wrap around entry pulleys to create a molding zone. The molten metal is delivered to a curved surface of each belt to form strip metal. The molten metal is contained within the molding zone by a pair of edge containment devices. The edge containment devices have a C-shaped magnetic member with an upper pole having an upper pole face and a lower pole face. Current flows through a coil wrapped around a core region of the magnetic member to create magnetic lines of force that flow between the upper pole face and the lower pole face. The C-shaped magnetic member is positioned such that magnetic lines of force pass through the edges of the two belts and the molten metal, and keep the molten metal within the molding zone. According to the present invention, the pole faces can have a positive angle, a negative angle, no angle relative to a horizontal, or a combination thereof. The pole faces have a curved shape to maintain a constant distance between the pole faces and the edges of the two belts. The magnetic member can be formed from a series of bonded elements, a series of elements mechanically held together, or from a solid core. In a particular embodiment, the magnetic member comprises two halves which are removably attached to the core to facilitate replacement of the coil wrapped around the core region.

IPC 1-7 (main, further and additional classification)

B22D 11/06

IPC 8 full level (invention and additional information)

B22D 11/06 (2006.01)

CPC (invention and additional information)

B22D 11/0662 (2013.01)

Designated contracting state (EPC)

DE FR GB

EPO simple patent family

WO 9836861 A1 19980827; AU 6266198 A 19980909; DE 69809398 D1 20021219; DE 69809398 T2 20030612; EP 0964759 A1 19991222; EP 0964759 B1 20021113; US 2004050530 A1 20040318

INPADOC legal status


2005-12-02 [REG FR ST] NOTIFICATION OF LAPSE

- Effective date: 20051031

2005-10-31 [PG25 FR] LAPSED IN A CONTRACTING STATE ANNOUNCED VIA POSTGRANT INFORM. FROM NAT. OFFICE TO EPO

- Ref Country Code: FR

- Free text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

- Effective date: 20051031

2005-10-05 [GBPC] GB: EUROPEAN PATENT CEASED THROUGH NON-PAYMENT OF RENEWAL FEE

- Effective date: 20050212

2005-09-01 [PG25 DE] LAPSED IN A CONTRACTING STATE ANNOUNCED VIA POSTGRANT INFORM. FROM NAT. OFFICE TO EPO

- Ref Country Code: DE

- Free text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

- Effective date: 20050901

2005-02-12 [PG25 GB] LAPSED IN A CONTRACTING STATE ANNOUNCED VIA POSTGRANT INFORM. FROM NAT. OFFICE TO EPO

- Ref Country Code: GB

- Free text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

- Effective date: 20050212

2004-02-27 [PGFP DE] POSTGRANT: ANNUAL FEES PAID TO NATIONAL OFFICE

- Ref Country Code: DE

- Payment date: 20040227

- Year of fee payment: 7

2004-02-02 [PGFP FR] POSTGRANT: ANNUAL FEES PAID TO NATIONAL OFFICE

- Ref Country Code: FR

- Payment date: 20040202

- Year of fee payment: 7

2004-01-07 [PGFP GB] POSTGRANT: ANNUAL FEES PAID TO NATIONAL OFFICE

- Ref Country Code: GB

- Payment date: 20040107

- Year of fee payment: 7

2003-11-05 [26N] NO OPPOSITION FILED

- Effective date: 20030814

2003-06-27 [ET] FR: TRANSLATION FILED

2002-12-19 [REF] CORRESPONDS TO:

- Document: DE 69809398 20021219

2002-11-13 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: B1

- Designated State(s): DE FR GB

2002-11-13 [REG GB FG4D] EUROPEAN PATENT GRANTED

2001-05-16 [17Q] FIRST EXAMINATION REPORT

- Effective date: 20010403

2000-07-12 [RAP1] TRANSFER OF RIGHTS OF AN APPLICATION

- Owner name: ALCOA INC.

1999-12-22 [17P] REQUEST FOR EXAMINATION FILED

- Effective date: 19990914

1999-12-22 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A1

- Designated State(s): DE FR GB