Thomas R Szczepanski

US Patent:

59429615, Aug 24, 1999

Filed:

Mar 22, 1995

Appl. No.:

8/407963

Inventors:

Raymond Charles Srail - Parma OH
Richard August Glover - Brookpark OH
Thomas Raymond Szczepanski - North Royalton OH
Eric Martin Weissman - Chagrin Falls OH
Frederic William Kunig - Akron OH

Assignee:

Flexmag Industries, Inc. - Marietta OH

International Classification:

H01F 720

US Classification:

335284

Abstract:

A process and apparatus for permitting the magnetization of flexible hard magnetic materials in the form of sheets or strips, such as magnetic rubber, wherein opposing arrays formed from alternating magnetic disks and flux conducting elements are use in sets of two with opposing polar moments such as to induce a magnetic flux in the gap between the discs. The width of the magnetic disk and flux conducting elements, respectively, are selected to optimize the magnetic pull strength of the material. At the array ends are flux conducting elements that are about 1/2 (i. e. , from about 0. 25 to about 0. 75, and preferably from about 0. 4 to 0. 6) of the width of the internal flux conducting elements. A material to be magnetized is passed between the array sets in contrast with both disks and consequently imprinted with magnetic poles. The magnetized properties of the material is enhanced by passing the material through a second set of arrays which are axially offset with respect to the first set of arrays.

US Patent:

48914096, Jan 2, 1990

Filed:

May 3, 1988

Appl. No.:

7/189937

Inventors:

Tiong H. Kuan - Hudson OH
Raymond C. Srail - Parma OH
Thomas R. Szczepanski - North Royalton OH

Assignee:

R.J.F. International - Brecksville OH

International Classification:

C09L 902
C09L 906

US Classification:

525237

Abstract:

Crystalline elastomeric network compositions are transformable from their original cured shape into an altered shape and subsequently back to their original shape. The transformation process, which is repeatable, is effected by the simultaneous application of heat and deformation forces. The amount of heat required, expressed in terms of temperature, is relatively low. The shape-transformable compositions of the present invention are single phase blends of one or more crystalline polymers and one or more elastomer polymers. The compositions generally have a single broad endotherm due probably to the co-crystallization of the different crystalline segments, a low glass transition temperature, and a low transformation temperature, that is generally less than 100. degree. C.

US Patent:

54283329, Jun 27, 1995

Filed:

May 26, 1994

Appl. No.:

8/249668

Inventors:

Raymond C. Srail - Parma OH
Richard A. Glover - Brookpark OH
Thomas R. Szczepanski - North Royalton OH
Eric M. Weissman - Chagrin Falls OH
Frederic W. Kunig - Akron OH

Assignee:

RJF International Corporation - Brecksville OH

International Classification:

H01F 702
H01F 720
H01H 4700

US Classification:

335302

Abstract:

A process and apparatus for permitting the magnetization of flexible hard magnetic materials in the form of sheets or strips, such as magnetic rubber, wherein opposing arrays formed from alternating magnetic disks and flux conducting elements are use in sets of two with opposing polar moments such as to induce a magnetic flux in the gap between the discs. The width of the magnetic disk and flux conducting elements, respectively, are selected to optimize the magnetic pull strength of the material. At the array ends are flux conducting elements that are about 1/2 (i. e. , from about 0. 25 to about 0. 75, and preferably from about 0. 4 to 0. 6) of the width of the internal flux conducting elements. A material to be magnetized is passed between the array sets in contrast with both disks and consequently imprinted with magnetic poles. The magnetized properties of the material is enhanced by passing the material through a second set of arrays which are axially offset with respect to the first set of arrays.

US Patent:

55677576, Oct 22, 1996

Filed:

Jul 18, 1995

Appl. No.:

8/503870

Inventors:

Thomas R. Szczepanski - North Royalton OH

Assignee:

RJF International Corporation - Fairlawn OH

International Classification:

C08K 310
C08L 2304
H01F 1117
H01F 1113

US Classification:

524435

Abstract:

Magnetic or magnetizable composites contain ferrite or rare earth particles in a lightweight flexible binder blend of a semicrystalline polyolefin dispersed within a rubbery matrix. Small but effective amounts of lubricating agents are utilized to improve the processability of the composite which generally lacks any halogen and is environmentally friendly.

US Patent:

50512005, Sep 24, 1991

Filed:

Sep 19, 1989

Appl. No.:

7/409539

Inventors:

Raymond C. Srail - Parma OH
Richard A. Glover - Brookpark OH
Tiong H. Kuan - Hudson OH
Thomas R. Szczepanski - North Royalton OH

Assignee:

The B. F. Goodrich Company - Brecksville OH

International Classification:

C04B 3550
C08J 320
C08K 308
C08L 902

US Classification:

252 6254

Abstract:

A flexible magnetic blend composition is provided which is comprised of high energy rare earth magnetic particles in a flexible high temperature resistant and oil resistant polymer binder. The binder system preferably comprises a highly saturated nitrile rubber (HSN) or a polymer alloy of the same in which a HSN is the major polymer and also contains additives which are compatible with processing, subsequent electron beam curing, and final product performance. The binder system is high loaded, usually from about 50 to about 70 volume percent, with the high energy rare earth magnetic particles, which can produce bonded magnets with a maximum energy product of at least 2. 5 megagauss-oersteds, a remenance, B. sub. r of at least 3400 gauss, a coercive force, Hc, of at least 2900 oersteds and an intrinsic coercivity, Hci, of at least 5000 oersteds. The process for production of this system involves the binder system and rare earth magnetic particles being mixed and then formed into a final geometry before being cured by high voltage electron beam radiation.

US Patent:

50026771, Mar 26, 1991

Filed:

Sep 19, 1989

Appl. No.:

7/409491

Inventors:

Raymond C. Srail - Parma OH
Richard A. Glover - Brookpark OH
Tiong H. Kuan - Hudson OH
Thomas R. Szczepanski - North Royalton OH

Assignee:

The B. F. Goodrich Company - Akron OH

International Classification:

C04B 3504

US Classification:

252 6254

Abstract:

A flexible magnetic blend composition is provided which is comprised of high energy ferrite magnetic particles in a flexible high temperature resistant and oil resistant polymer binder. The binder system is preferably a highly saturated nitrile rubber (HSN) or a polymer alloy of the same in which a HSN is the major polymer containing alloying polymers and/or additives which are compatible with processing, subsequent electron beam curing, and final product performance. The binder system is highly loaded usually from 55 to 65 volume percent with the high energy ferrite particles, i. e. , barium and/or strontium ferrite particles, which can produce bonded magnets with a maximum energy product of at least 1. 0 megagauss-oersteds, a remenance, Br, of at least 2000 gauss, a coercive force, H. sub. c, of at least 1800 oersteds, and an intrinsic coercivity, H. sub.