Paul M Swartz

US Patent:

8187418, May 29, 2012

Filed:

Jan 7, 2008

Appl. No.:

12/006901

Inventors:

Richard Emil Kajander - Toledo OH, US
Alan Michael Jaffee - Bowling Green OH, US
Paul Russell Swartz - Perrysburg OH, US
Richard Jon Kindle - Bowling Green OH, US

Assignee:

Johns Manville - Denver CO

International Classification:

D21H 27/38
D21H 13/40

US Classification:

162123, 162129, 162141, 162145, 162146, 162156, 162158, 156 60

Abstract:

A multilayer fibrous nonwoven mat containing at least one transition zone comprised of a mixture of the slurries used to form the layers on each side of the transition zone, the transition zone having a thickness of at least 1 percent of the thickness of the mat. At least one of the layers contains glass fibers. The multilayer mats are particularly useful as facers on gypsum wall board, insulating foam, a wood material and a broad range of other materials. The multilayer mats are made by a method that involves using a lamella in the forming box on a wet laid mat machine, between slurries, the lamella ending a significant distance prior to a moving forming wire. The transition zone or zones provide superior interlaminar shear strength and other properties compared to multilayer fibrous mats produced on wet laid machines having two or more separate forming boxes.

US Patent:

20070012414, Jan 18, 2007

Filed:

Jul 12, 2005

Appl. No.:

11/179393

Inventors:

Richard Kajander - Toledo OH, US
Alan Jaffee - Bowling Green OH, US
Paul Swartz - Perrysburg OH, US
Richard Kindle - Bowling Green OH, US

International Classification:

B32B 7/00
D21H 27/38
D21F 11/00

US Classification:

162129000, 162156000, 428537500

Abstract:

A multilayer fibrous nonwoven mat containing at least one transition zone comprised of a mixture of the slurries used to form the layers on each side of the transition zone, the transition zone having a thickness of at least 1 percent of the thickness of the mat. At least one of the layers contains glass fibers. The multilayer mats are particularly useful as facers on gypsum wall board, insulating foam, a wood material and a broad range of other materials. The multilayer mats are made by a method that involves using a lamella in the forming box on a wet laid mat machine, between slurries, the lamella ending a significant distance prior to a moving forming wire. The transition zone or zones provide superior interlaminar shear strength and other properties compared to multilayer fibrous mats produced on wet laid machines having two or more separate forming boxes.

US Patent:

58519335, Dec 22, 1998

Filed:

Sep 14, 1995

Appl. No.:

8/528284

Inventors:

Paul Russell Swartz - Perrysburg OH
George Nicholas Ello - Toledo OH

Assignee:

Johns Manville International, Inc. - Denver CO

International Classification:

B32B 516
B32B 1706

US Classification:

442180

Abstract:

Methods for making nonwoven fibrous mats that produce superior tear strengths in roofing products, and the mats produced by the method, are disclosed. The mats comprise glass fiber bonded together with a dried and cured mixture of aqueous urea formaldehyde resin and a self crosslinking copolymer of vinyl acrylic or polyvinyl acetate.