Elizabeth H W Hamilton

US Patent:

54784239, Dec 26, 1995

Filed:

Apr 28, 1994

Appl. No.:

8/235021

Inventors:

Robert L. Sassa - Newark DE
Alex R. Hobson - Elkton MD
Elizabeth M. Hamilton - Elkton MD
Kristin E. Wiliamson - Bear DE

Assignee:

W. L. Gore & Associates, Inc. - Newark DE

International Classification:

B31C 1300

US Classification:

156187

Abstract:

An improved method for making a release agent delivery device for delivery of release agent to a roller is disclosed for use in laser printers, plain paper copiers, facsimile machines, and similar printing apparatus. The delivery apparatus comprises an absorbent textile core filled with release agent, a permeable membrane surrounding the textile core to form a sheathed wick member, and a mounting sleeve adapted to attach the sheathed wick member in operative contact with the printer. The apparatus has numerous operational advantages over existing oil delivery apparatus, including providing multiple contact surfaces for longer operational life before replacement, ease in cleaning and regeneration, improved durability and reduced wear, and more compact and versatile operation.

US Patent:

54860105, Jan 23, 1996

Filed:

Sep 8, 1993

Appl. No.:

8/118372

Inventors:

Elizabeth M. Hamilton - Elkton MD
Eric W. Lalli - Elkton MD
Cindy B. Lubin - Towson MD
Wanda F. Sparks - Elkton MD
Alfred F. Waterland - Elkton MD

Assignee:

W. L. Gore & Associates, Inc. - Newark DE

International Classification:

F16J 1510

US Classification:

277 1

Abstract:

Improved material and method for use in sealing plate and frame apparatus, such as a plate and frame heat exchanger, are provided. The gasket material comprises a core of elongated polytetrafluoroethylene (PTFE) contained within a tight wrap of high strength film. The gasket material has the exceptional operational properties of PTFE, while being resistant to cold flow or "creep" which distorts most PTFE seals under heavy unconfined compression. The preferred material is pre-compressed to aid in installation.

US Patent:

54943019, Feb 27, 1996

Filed:

Apr 20, 1993

Appl. No.:

8/050903

Inventors:

Elizabeth M. Hamilton - Elkton MD
Eric W. Lalli - Elkton MD
Cindy B. Lubin - Phoenixville PA
Wanda F. Sparks - Elkton MD
Alfred F. Waterland - Elkton MD

Assignee:

W. L. Gore & Associates, Inc. - Newark DE

International Classification:

F16J 1510

US Classification:

277227

Abstract:

A composite gasket material composed of a core of elongated polytetrafluoroethylene wrapped with a high strength porous expanded polytetrafluoroethylene film is provided. The composite gasket material exhibits increased resistance to creep while in use so that thickness of the composite gasket material and thus gasket stress is maintained.