Charles Warren Lindeman

US Patent:

49467379, Aug 7, 1990

Filed:

Sep 3, 1987

Appl. No.:

7/092721

Inventors:

Charles M. Lindeman - Lancaster PA
Ralph D. Andrew - Lancaster PA

Assignee:

Armstrong World Industries, Inc. - Lancaster PA

International Classification:

B65D 5300
F16J 1500

US Classification:

428283

Abstract:

A gasket is described which contains microspheres which expand inside the gasket sheet material after the gasket sheet is formed. Such gaskets are especially useful to provide a seal against fluid leaks at significantly lower pressures due to the presence of the microspheres. Some microspheres can expand during use.

US Patent:

43304427, May 18, 1982

Filed:

May 7, 1980

Appl. No.:

6/148669

Inventors:

Charles M. Lindeman - Lancaster PA
Ralph D. Andrew - Lancaster PA

Assignee:

Armstrong World Industries, Inc. - Lancaster PA

International Classification:

C08K 708
C08K 710
C08K 704
C08K 702

US Classification:

524 16

Abstract:

An asbestos-free gasket forming composition is disclosed. The composition is preferably produced by removing water from an aqueous furnish composition comprising phenolic fibers, aromatic polyamide fibers, an inorganic or cork filler, a synthetic rubber binder, and a water insoluble hydroxide produced from a soluble salt selected from the group consisting of aluminum salts, ferric salts and stannic salts, by reaction with a sufficient amount of an alkaline hydroxide to provide a furnish pH within the range of from about 6 to about 10, and preferably of from about 7 to 8.

US Patent:

51320614, Jul 21, 1992

Filed:

May 29, 1990

Appl. No.:

7/529582

Inventors:

Charles M. Lindeman - Lancaster PA
Ralph D. Andrew - Lancaster PA

Assignee:

Armstrong World Industries, Inc. - Lancaster PA

International Classification:

B29C 6722

US Classification:

264 453

Abstract:

A gasket which contains microspheres which expand inside the gasket sheet material after the gasket sheet is formed. Such gaskets are especially useful to provide a seal against fluid leaks at significantly lower pressures due to the presence of the microspheres. Some microspheres can expand during use.