Jeremy H Klug

US Patent:

6604457, Aug 12, 2003

Filed:

May 11, 2001

Appl. No.:

09/853389

Inventors:

Jeremy H. Klug - Brunswick OH

Assignee:

GrafTech Inc. - Parma OH

International Classification:

B44C 124

US Classification:

101 32, 101 6, 101 23, 101 28, 264284, 72197, 83880, 83863, 83116

Abstract:

Apparatus and methods are provided for the embossing of a sheet of flexible graphite material between a pair of embossing rollers. The embossing rollers include a primary embossing roller and a backup roller. The primary embossing roller has an embossing pattern defined thereon. One or both of the rollers include a raised stabilization area adjacent a periphery of the embossing pattern. The raised stabilization area preferably has a roughened outer surface for better gripping the sheet of flexible graphite material. The raised stabilization areas apply a stabilizing force to the sheet adjacent the periphery of the embossing pattern, thereby limiting egress of the material laterally away from the embossing pattern. The roughened surfaces increase the grip of the raised areas upon the sheet, thus aiding in pulling the sheet between the rollers and also aiding in the application of lateral stabilization forces to the sheet.

US Patent:

6663807, Dec 16, 2003

Filed:

May 14, 2001

Appl. No.:

09/855066

Inventors:

Jeremy H. Klug - Brunswick OH

Assignee:

Advanced Energy Technology Inc. - Wilmington DE

International Classification:

B29C 5904

US Classification:

264105, 264136, 264160, 264283, 264293, 264296, 264175, 428408

Abstract:

Processes are provided for formation of complex shapes by embossing of a sheet of flexible graphite material. In one approach, a sheet of material is provided with a variable resin concentration across its width, and the position of the variable resin concentration is correlated with the position of embossing features which will result in thinner areas in the embossed articles. In a second approach, recesses are provided in the embossing rollers to accommodate material flow during embossing. These recesses result in protrusions formed on the articles, which protrusions must then be removed in a machining operation.

US Patent:

6702970, Mar 9, 2004

Filed:

May 3, 2001

Appl. No.:

09/848149

Inventors:

Jeremy H. Klug - Brunswick OH

Assignee:

Advanced Energy Technology Inc. - Wilmington DE

International Classification:

B29C 3358

US Classification:

264166, 264280, 264284, 2642971, 264316

Abstract:

Processes and systems to reduce sticking of graphite materials and particularly resin impregnated graphite materials to forming tools, such as an embossing roller, during a process of manufacturing articles from the graphite materials. In one embodiment, an aerosol spray non-stick material is intermittently sprayed upon the embossing rollers. In a second embodiment, one or more sheets of thin flexible solid non-stick material, such as polyethylene, are sandwiched between the graphite material and the embossing rollers. The system is particularly useful for manufacturing material useful in producing components of fuel cells.

US Patent:

6716381, Apr 6, 2004

Filed:

Apr 4, 2001

Appl. No.:

09/826228

Inventors:

Jeremy Klug - Brunswick OH

Assignee:

Advanced Energy Technology Inc. - Wilmington DE

International Classification:

B29C 5904

US Classification:

264134, 264137, 264280, 264284

Abstract:

A process for embossing a flexible graphite sheet, and the flexible graphite article produced thereby is presented. The inventive process includes the steps of providing an embossing apparatus which generally comprises two opposed elements, one of the two opposed elements comprising an embossing element having an embossing pattern thereon, the embossing pattern formed by arraying a series of lands having a predetermined height from the surface of the embossing element and channel floors, about the surface of the embossing element; and the other of the two opposed elements comprising a landing element, wherein the embossing element and landing element are arrayed in the embossing apparatus such that the surface of the landing element is separated from the channel floors of the embossing element by a distance âdâ which is at least equal to the height of the lands; and embossing a flexible graphite sheet by passing it between the embossing element and the landing element of the embossing apparatus such that the lands of the embossing element exert pressure on the flexible graphite sheet, wherein the flexible graphite sheet has a thickness in the region of the embossing pattern prior to embossing which is less than distance âdâ, but greater than the distance between the surface of the landing element and the lands of the embossing element, thus forming a gap between the flexible graphite sheet and the channel floors of the embossing element, further wherein embossing of the flexible graphite sheet in the embossing apparatus causes material to flow from the area of the flexible graphite sheet which encounters pressure from the lands of the embossing element to the gap between the flexible graphite sheet and the channel floors of the embossing element.

US Patent:

6777086, Aug 17, 2004

Filed:

Aug 31, 2001

Appl. No.:

09/943131

Inventors:

Julian Norley - Chagrin Falls OH 44023
John Joseph Brady - Cleveland OH 44144
George Getz - Parma Heights OH 44130
Jeremy Klug - Brunswick OH 44212

International Classification:

B32B 900

US Classification:

428408

Abstract:

Laminates are prepared from resin-impregnated flexible graphite sheets. Impregnated sheets are calendered and layers of the calendered sheets, which may also be coated with a resin adhesive, are stacked into structures which optionally contains layers of metals or plastics. After curing at elevated temperature and pressure, 2500 psi and 150Â C. , the laminates form dense machinable structures suitable for uses such as electronic thermal management (ETM) devices.

US Patent:

6841248, Jan 11, 2005

Filed:

Mar 29, 2002

Appl. No.:

10/113382

Inventors:

Jeremy H. Klug - Brunswick OH, US

Assignee:

Advanced Energy Technology Inc. - Wilmington DE

International Classification:

B32B 900

US Classification:

428408

Abstract:

A graphite article comprising a compressed mass of graphite particles and a reactive lubricant, and a method of producing a graphite articles comprising a compressed mass of graphite particles and a reactive lubricant. The compressed mass of graphite particles may be impregnated with a lubricant and a resin. The lubricant may be a functionalized wax, fatty ester, silicone, or fatty acid. The lubricant may also be partially or fully fluorinated.

US Patent:

7108917, Sep 19, 2006

Filed:

Jan 28, 2004

Appl. No.:

10/766420

Inventors:

Jeremy Klug - Brunswick OH, US

Assignee:

Advanced Energy Technology Inc. - Wilmington DE

International Classification:

B32B 9/00

US Classification:

428408

Abstract:

A flexible graphite sheet material having improved molding characteristics is provided by effecting resin impregnation such that the resin profile across one of the dimensions of the sheet is non-uniform.

US Patent:

7182898, Feb 27, 2007

Filed:

May 13, 2002

Appl. No.:

10/476251

Inventors:

Jeremy H. Klug - Brunswick OH, US

Assignee:

Advanced Energy Technology Inc. - Lakewood OH

International Classification:

B29C 59/04

US Classification:

264145, 264284, 264296

Abstract:

Processes are provided for formation of complex shapes by embossing of a sheet of flexible graphite material. In one approach, a sheet () of material is provided with a variable resin concentration across a selected dimension of the sheet, and the position of the variable which will result in thinner areas in the embossed articles. In a second approach, recesses are provided in the embossing rollers ( and/or ) to accomodate material flow during embossing. These recesses result in protrusions formed on the articles, which protrusions must then be removed in a machining operation.