Harold C Overton

US Patent:

44181000, Nov 29, 1983

Filed:

Feb 2, 1982

Appl. No.:

6/344998

Inventors:

Junion L. Bedwell - Gadsden AL
Harold C. Overton - Gadsden AL

Assignee:

Republic Steel Corporation - Cleveland OH

International Classification:

B05D 304
B05D 312
B05D 118

US Classification:

427348

Abstract:

A method and apparatus are disclosed for reducing spangle in a galvanization system that utilizes air knives to control coating thickness and distribution. Cooling nozzles are located downstream of the air knives along the feed path of the substrate being coated. The cooling nozzles direct an air and water mixture against the substrate at approximately the location the air from the air knives impinge the substrate. The air from the air knives force the air and water mixture to be carried along the substrate surface in a direction of the substrate feed path.

US Patent:

40418952, Aug 16, 1977

Filed:

Sep 29, 1975

Appl. No.:

5/617742

Inventors:

Harold C. Overton - Gadsden AL
Theodore L. Page - Gadsden AL

Assignee:

Republic Steel Corporation - Cleveland OH

International Classification:

B05C 1106

US Classification:

118 7

Abstract:

A system for controlling the thickness and distribution of a coating applied to a moving substrate includes a pair of "air knives" which discharge pressurized fluid onto a moving substrate as it emerges from a coating bath to screed excess coating from the substrate and leave a coating deposit having a desired thickness and distribution. Each air knife has a plenum chamber which supplies pressurized fluid to a pair of nozzle lips that define an elongated nozzle opening. Fluid flow influencing devices are provided between the plenum and the nozzle lips of each air knife. The flow influencing devices preferably include a baffle plate, a screen assembly, a shutter plate, and a vane assembly. The baffle plate and the screen assembly help assure that a laminar, equally pressurized flow is supplied to the shutter plate. The shutter plate has specially configured flow restricting openings that cause the pressure profile of fluid discharging from the air knives to vary in a predetermined manner along the length of their nozzle openings, whereby coating profiles are caused to vary in a predetermined manner across the width of the substrate.