Neil R Manning

US Patent:

54317460, Jul 11, 1995

Filed:

Aug 30, 1993

Appl. No.:

8/114439

Inventors:

Neil R. Manning - Marengo IL
Richard L. Anderson - Marengo IL

Assignee:

SPS Technologies, Inc. - Newtown PA

International Classification:

C23C 822

US Classification:

148122

Abstract:

Methods for preparing magnetic strips are provided in which the strips are manufactured to a thickness of less than about 0. 005 inches and are made of a ferrous alloy having a carbon content of from about 0. 4 to about 1. 2 weight percent. The strips are prepared by first manufacturing an alloy having a carbon content below about 0. 5 weight percent to the desired thickness and then subjecting the strip to a carburizing step to raise the carbon content in the strip.

US Patent:

55273998, Jun 18, 1996

Filed:

Feb 27, 1995

Appl. No.:

8/394705

Inventors:

Neil R. Manning - Marengo IL
Richard L. Anderson - Marengo IL

Assignee:

The Arnold Engineering Company - Marengo IL

International Classification:

H01F 1147
H01F 4102

US Classification:

148120

Abstract:

Methods for preparing magnetic strips are provided in which the strips are manufactured to a thickness of less than about 0. 005 inches and are made of a ferrous alloy having a carbon content of from about 0. 4 to about 1. 2 weight percent. The strips can be prepared by first manufacturing an alloy having a carbon content below about 0. 5 weight percent to the desired thickness and then subjecting the strip to a carburizing step to raise the carbon content in the strip. The strips can also be prepared by controlling the chemistry of the initial alloy and controlling the processing of that alloy until the desired thickness and requisite magnetic properties are obtained. The strips are particularly useful in EAS systems.

US Patent:

56538243, Aug 5, 1997

Filed:

Feb 26, 1996

Appl. No.:

8/605463

Inventors:

Neil R. Manning - Marengo IL
Richard L. Anderson - Marengo IL

Assignee:

The Arnold Engineering Company - Marengo IL

International Classification:

H01F 1147

US Classification:

148306

Abstract:

Methods for preparing magnetic strips are provided in which the strips are manufactured to a thickness of less than about 0. 005 inches and are made of a ferrous alloy having a carbon content of from about 0. 4 to about 1. 2 weight percent. The strips can be prepared by first manufacturing an alloy having a carbon content below about 0. 5 weight percent to the desired thickness and then subjecting the strip to a carburizing step to raise the carbon content in the strip. The strips can also be prepared by controlling the chemistry of the initial alloy and controlling the processing of that alloy until the desired thickness and requisite magnetic properties are obtained. The strips are particularly useful in EAS systems.

US Patent:

57164606, Feb 10, 1998

Filed:

May 8, 1996

Appl. No.:

8/646986

Inventors:

Neil R. Manning - Marengo IL
Richard L. Anderson - Marengo IL

Assignee:

The Arnold Engineering Company - Marengo IL

International Classification:

H01F 1147

US Classification:

148120

Abstract:

Methods for preparing magnetic strips are provided in which the strips are manufactured to a thickness of less than about 0. 005 inches and are made of a iron-based alloy having a manganese content of from about 8 to about 18 weight percent. The thin strips can be prepared by annealing the alloy, then cold rolling the alloy to reduce its thickness by at least about 40% to produce an initial strip, thermally treating the initial strip between about 400. degree. C. and its austenitizing temperature, cold rolling the initial strip to reduce its thickness by at least 75% to below about 0. 005 inches, and thermally treating this strip at a temperature of at least 525. degree. C. for a period of time between about 0. 1 and about 3 minutes. The strips are particularly useful in electronic article surveillance systems.

US Patent:

56118724, Mar 18, 1997

Filed:

Mar 28, 1995

Appl. No.:

8/412165

Inventors:

Neil R. Manning - Marengo IL
Richard L. Anderson - Marengo IL

Assignee:

The Arnold Engineering Company - Marengo IL

International Classification:

H01F 1147

US Classification:

148306

Abstract:

Methods for preparing magnetic strips are provided in which the strips are manufactured to a thickness of less than about 0. 003 inches and are made of a ferrous alloy having a carbon content of from about 0. 4 to about 1. 2 weight percent. The strips are prepared by first manufacturing an alloy having a carbon content below about 0. 5 weight percent to the desired thickness and then subjecting the strip to a carburizing step to raise the carbon content in the strip.