Patent · US Expired

Metal-reinforced graphite multilayer sheet

US6258457A · kind A · utility

50Cited by

5References

67Claims

0Family size

Assignee

SGL Technik GmbH · DE

Inventors

Oswin Öttinger · Meitingen, DE
Silvia Mechen · Meitingen, DE
Mike Rommler · Berlin, DE

Key dates

Filing date	Feb 4, 1999
Grant date	Jul 10, 2001
Priority date	—
Expiry date	Feb 4, 2019

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T428/30
WIPO fieldSurface technology, coating
WIPO sectorChemistry

Abstract

A multilayer sheet having high compressive strength, high heat resistance and low permeability relative to fluids, includes layers of graphite foils and metal foils disposed alternating one upon another and parallel, with the graphite foils joined to the metal foils. Each of two layers forming an upper and a lower boundary of the multilayer sheet is a metal foil having a flat outwardly-directed surface completely covered with and joined to a gas-tight foil made of an organic polymer having a long-term temperature stability of at least 150.degree. C. Preferably, no adhesives are used for joining the foils. The multilayer sheet is preferably used for producing flat gaskets.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.