Curtis E Brown

US Patent:

60188596, Feb 1, 2000

Filed:

Jun 3, 1998

Appl. No.:

9/089761

Inventors:

John J. Borzym - Northville MI
Theodore H. Krengel - Flossmoor IL
Charles A. Willetts - Stourbridge, GB
Curtis R. Brown - Novi MI
Edward Wiesenthal - Novi MI

Assignee:

The Idod Trust - Warren MI

International Classification:

B25P 2500

US Classification:

29458

Abstract:

The method of forming a seamed metal tube having a metal coating of this invention includes applying a metal coating to the upper face of a metal strip prior to welding. The strip is then formed into an open seam tube and welded, preferably in a non-oxidizing atmosphere with the seam preferably located in the lower portion of the tube. Finally, at least a lower portion of said tube is reheated with the seam located in the lower portion of the tube, thereby causing the metal coating to flow downwardly over the seam, coating the seam. In one embodiment, the strip is preformed into an arcuate shape and coated, wherein the metal coating increases in thickness toward the lateral strip edges, such that the coating will flow over the seam following welding. The inside coated seamed tube may also be immersed in a galvanizing or metal coating bath to coat the outside of the tube. In a preferred embodiment, the inside and outside coatings comprise substantially the same metal and a single galvanizing bath apparatus is used to coat the inside and outside surfaces of the seamed tube.

US Patent:

59154217, Jun 29, 1999

Filed:

Jul 10, 1997

Appl. No.:

8/891111

Inventors:

John J. Borzym - Northville MI
Theodore H. Krengel - Flossmoor IL
Charles A. Willetts - West Midland, GB
Curtis R. Brown - Novi MI
Edward Wiesenthal - Novi MI

Assignee:

The IDOD Trust - Novi MI

International Classification:

F16L 914

US Classification:

138142

Abstract:

The method of forming a seamed metal tube having a metal coating of this invention includes applying a metal coating to the upper face of a metal strip prior to welding. The strip is then formed into an open seam tube and welded, preferably in a non-oxidizing atmosphere with the seam preferably located in the lower portion of the tube. Finally, at least a lower portion of said tube is reheated with the seam located in the lower portion of the tube, thereby causing the metal coating to flow downwardly over the seam, coating the seam. In one embodiment, the strip is preformed into an arcuate shape and coated, wherein the metal coating increases in thickness toward the lateral strip edges, such that the coating will flow over the seam following welding. The inside coated seamed tube may also be immersed in a galvanizing or metal coating bath to coat the outside of the tube. In a preferred embodiment, the inside and outside coatings comprise substantially the same metal and a single galvanizing bath apparatus is used to coat the inside and outside surfaces of the seamed tube.

US Patent:

57328749, Mar 31, 1998

Filed:

Mar 8, 1995

Appl. No.:

8/399054

Inventors:

John J. Borzym - Northville MI
Theodore H. Krengel - Flossmoor IL
Charles A. Willetts - West Midland, GB2
Curtis R. Brown - Novi MI
Edward Wiesenthal - Novi MI

Assignee:

The IDOD Trust - Novi MI

International Classification:

B21C 3709
B23K 902

US Classification:

228147

Abstract:

The method of forming a seamed metal tube having a metal coating of this invention includes applying a metal coating to the upper face of a metal strip prior to welding. The strip is then formed into an open seam tube and welded, preferably in a non-oxidizing atmosphere with the seam preferably located in the lower portion of the tube. Finally, at least a lower portion of said tube is reheated with the seam located in the lower portion of the tube, thereby causing the metal coating to flow downwardly over the seam, coating the seam. In one embodiment, the strip is preformed into an arcuate shape and coated, wherein the metal coating increases in thickness toward the lateral strip edges, such that the coating will flow over the seam following welding. The inside coated seamed tube may also be immersed in a galvanizing or metal coating bath to coat the outside of the tube. In a preferred embodiment, the inside and outside coatings comprise substantially the same metal and a single galvanizing bath apparatus is used to coat the inside and outside surfaces of the seamed tube.