Walter B Davis

US Patent:

7399438, Jul 15, 2008

Filed:

Feb 24, 2004

Appl. No.:

10/785559

Inventors:

Randy Jon Clark - Klamath Falls OR, US
Walter B. Davis - Klamath Falls OR, US
Jonathan Philip Alexander - Edinburgh, GB

Assignee:

JELD-WEN, inc. - Klamath Falls OR

International Classification:

B29C 5/00

US Classification:

264120, 264109

Abstract:

A method to produce thin-layer lignocellulosic composites, such as wood-based doorskins, that exhibit substantial resistance to moisture is disclosed. In an embodiment, the method includes the steps of forming a mixture including a refined lignocellulosic fiber, wax, and an organic isocyanate resin. The mixture is initially pressed to form a loose mat. Subsequently, the mat is pressed between two dies at an elevated temperature and pressure to further reduce the thickness of the mat and to promote the interaction of the resin with the lignocellulosic fibers. In an embodiment, a release agent is included as part of the fiber mixture, or sprayed onto the surface of the mat. The thin-layer lignocellulosic composites of the present invention exhibit strong surface strength, high adhesiveness, and a 50% reduction in linear expansion and thickness swelling upon exposure to a high moisture environment as compared to thin-layer composites that do not include the isocyanate resin.

US Patent:

7449229, Nov 11, 2008

Filed:

Nov 1, 2002

Appl. No.:

10/285449

Inventors:

Sean Robert Broker - Keno OR, US
Jonathan Philip Alexander - Klamath Falls OR, US
David J. Bleha - Klamath Falls OR, US
Randy Jon Clark - Klamath Falls OR, US
Walter B. Davis - Klamath Falls OR, US

Assignee:

Jeld-Wen, inc. - Klamath Falls OR

International Classification:

B32B 5/12

US Classification:

428106, 428113, 428220, 4282974, 428326, 428332, 428401, 4284841, 524 14, 524 16, 524 27

Abstract:

Systems and methods for making a material composition are disclosed. The method includes mixing a thermoset polymer, a petroleum distillate, a release agent, and a catalyst to form an admixture. A cellulosic material is mixed with the admixture to form a generally homogenous furnish. The system includes a mixing chamber, a feeding chamber, and a die. The die includes a pressing chamber, which has a volume formed by first and second platens. The platens are in facing opposition to one another and have a length extending continuously from an entrance to an exit of the die. The platens have a plurality of orifices and heating elements disposed along the length. The platens are disposed in first and second positions. The first position forms a first volume and the second position forms a second volume.

US Patent:

7919186, Apr 5, 2011

Filed:

May 16, 2008

Appl. No.:

12/152902

Inventors:

Randy Jon Clark - Klamath Falls OR, US
Walter B. Davis - Klamath Falls OR, US
Jonathan Philip Alexander - West Kirby, GB

Assignee:

JELD-WEN, inc. - Klamath Falls OR

International Classification:

B32B 27/40
B32B 21/04
B32B 21/14

US Classification:

4284251, 428339

Abstract:

A method to produce thin-layer lignocellulosic composites, such as wood-based doorskins, that exhibit substantial resistance to moisture is disclosed. In an embodiment, the method includes the steps of forming a mixture including a refined lignocellulosic fiber, wax, and an organic isocyanate resin. The mixture is initially pressed to form a loose mat. Subsequently, the mat is pressed between two dies at an elevated temperature and pressure to further reduce the thickness of the mat and to promote the interaction of the resin with the lignocellulosic fibers. In an embodiment, a release agent is included as part of the fiber mixture, or sprayed onto the surface of the mat. The thin-layer lignocellulosic composites of the present invention exhibit strong surface strength, high adhesiveness, and a 50% reduction in linear expansion and thickness swelling upon exposure to a high moisture environment as compared to thin-layer composites that do not include the isocyanate resin.

US Patent:

20090001628, Jan 1, 2009

Filed:

Aug 26, 2008

Appl. No.:

12/229742

Inventors:

Sean Robert Broker - Keno OR, US
Jonathan Philip Alexander - Klamath OR, US
David J. Bleha - Klamath Falls OR, US
Randy Jon Clark - Klamath Falls OR, US
Walter B. Davis - Klamath Falls OR, US

Assignee:

JELD-WEN, inc. - Klamath Falls OR

International Classification:

B29C 47/00
C08K 5/05
B29C 43/00

US Classification:

2641761, 524 35, 26433111

Abstract:

Systems and methods for making a material composition are disclosed. The method includes mixing a thermoset polymer, a petroleum distillate, a release agent, and a catalyst to form an admixture. A cellulosic material is mixed with the admixture to form a generally homogenous furnish. The system includes a mixing chamber, a feeding chamber, and a die. The die includes a pressing chamber, which has a volume formed by first and second platens. The platens are in facing opposition to one another and have a length extending continuously from an entrance to an exit of the die. The platens have a plurality of orifices and heating elements disposed along the length. The platens are disposed in first and second positions. The first position forms a first volume and the second position forms a second volume.

US Patent:

20090004315, Jan 1, 2009

Filed:

Aug 26, 2008

Appl. No.:

12/229744

Inventors:

Sean Robert Broker - Keno OR, US
Jonathan Philip Alexander - Klamath Falls OR, US
David J. Bleha - Klamath Falls OR, US
Randy Jon Clark - Klamath Falls OR, US
Walter B. Davis - Klamath Falls OR, US

Assignee:

JELD-WEN, inc. - Klamath Falls OR

International Classification:

B29C 47/50

US Classification:

425205

Abstract:

Systems and methods for making a material composition are disclosed. The method includes mixing a thermoset polymer, a petroleum distillate, a release agent, and a catalyst to form an admixture. A cellulosic material is mixed with the admixture to form a generally homogenous furnish. The system includes a mixing chamber, a feeding chamber, and a die. The die includes a pressing chamber, which has a volume formed by first and second platens. The platens are in facing opposition to one another and have a length extending continuously from an entrance to an exit of the die. The platens have a plurality of orifices and heating elements disposed along the length. The platens are disposed in first and second positions. The first position forms a first volume and the second position forms a second volume.

US Patent:

20110165375, Jul 7, 2011

Filed:

Mar 15, 2011

Appl. No.:

13/048672

Inventors:

Randy Jon Clark - Klamath Falls OR, US
Walter B. Davis - Klamath Falls OR, US
Jonathan Phillip Alexander - West Kirby, GB

Assignee:

JELD-WEN, INC. - Portland OR

International Classification:

B32B 27/04
B27N 3/02
B32B 27/40
B32B 21/02

US Classification:

428141, 264109, 428220, 428156

Abstract:

A method to produce thin-layer lignocellulosic composites, such as wood-based doorskins, that exhibit substantial resistance to moisture is disclosed. In an embodiment, the method includes the steps of forming a mixture including a refined lignocellulosic fiber, wax, and an organic isocyanate resin. The mixture is initially pressed to form a loose mat. Subsequently, the mat is pressed between two dies at an elevated temperature and pressure to further reduce the thickness of the mat and to promote the interaction of the resin with the lignocellulosic fibers. In an embodiment, a release agent is included as part of the fiber mixture, or sprayed onto the surface of the mat. The thin-layer lignocellulosic composites of the present invention exhibit strong surface strength, high adhesiveness, and a 50% reduction in linear expansion and thickness swelling upon exposure to a high moisture environment as compared to thin-layer composites that do not include the isocyanate resin.

US Patent:

40272710, May 31, 1977

Filed:

Nov 6, 1975

Appl. No.:

5/629728

Inventors:

David L. Cave - Mesa AZ
Walter R. Davis - Tempe AZ

Assignee:

Motorola, Inc. - Chicago IL

International Classification:

H03F 304

US Classification:

330 22

Abstract:

A stabilizing circuit which increases the effective value of a capacitor and the structure of a monolithic capacitor are disclosed. The stabilizing circuit includes a transistor having a base electrode connected to the capacitor and an emitter electrode connected to a point at which it is desired to provide an increased effective capacitance. The capacitor structure is suitable for being included in monolithic integrated circuits having diffused isolation regions. A first plate of the capacitor is formed by a metallization layer, the second plate of the capacitor may be formed by an emitter diffusion into the isolation diffusion. A base diffusion which is conductively connected to the emitter diffusion and to the isolation diffusion facilitates connection of the second plate of the capacitor to the substrate.

US Patent:

39538753, Apr 27, 1976

Filed:

Jan 2, 1974

Appl. No.:

5/430267

Inventors:

David L. Cave - Mesa AZ
Walter R. Davis - Tempe AZ

Assignee:

Motorola, Inc. - Chicago IL

International Classification:

H01L 2702

US Classification:

357 51

Abstract:

A stabilizing circuit which increases the effective value of a capacitor and the structure of a monolithic capacitor are disclosed. The stabilizing circuit includes a transistor having a base electrode connected to the capacitor and an emitter electrode connected to a point at which it is desired to provide an increased effective capacitance. The capacitor structure is suitable for being included in monolithic integrated circuits having diffused isolation regions. A first plate of the capacitor is formed by a metallization layer, the second plate of the capacitor may be formed by an emitter diffusion into the isolation diffusion. A base diffusion which is conductively connected to the emitter diffusion and to the isolation diffusion facilitates connection of the second plate of the capacitor to the substrate.