Stock material or miscellaneous articles – Structurally defined web or sheet – Including aperture
Reexamination Certificate
2011-08-02
2011-08-02
Kruer, Kevin R. (Department: 1787)
Stock material or miscellaneous articles
Structurally defined web or sheet
Including aperture
C428S213000, C428S218000, C428S408000, C428S461000, C428S463000, C277S936000, C277S939000, C277S945000, C277S312000
Reexamination Certificate
active
07989049
ABSTRACT:
The present invention relates generally to a composite plate produced by an alternating stack of (n+1) flexible graphite foils and (n) perforated metal reinforcing foils with spurs (where n≧2). The thicknesses of the flexible graphite foils used are preferably such that any 2 mm slice of thickness of the composite plate comprises at least 3 layers of flexible graphite, and has a graphite density per unit area of at least 2.34 kg/m2. For each perforated metal reinforcing foil, the spurs present on the foil generally have a height in relation to the surface of that foil that does not exceed about 1.3 times the thickness of the thinnest of the flexible graphite layers to which it is attached. A composite plate of the present invention enables the manufacture of gaskets that resist temperatures up to 550° C. under continuous service.
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Sigraflex Universal; “Sealing Sheet Made From Impregnated Graphite With Perforated Stainless Steel Sheet Reinforcement”; SGL Carbon Group.
Sigraflex; “Produkte Aus Flexibler Graphitfolie”; SGL Carbon Group.
Sigraflex University; “Verstaerkte Dichtungsplatte Aus Impraegniertem Graphit Mit Einer Einlage Aus Edelstahl Spiessblech”; SGL Carbon Group.
Baker Donelson Bearman Caldwell & Berkowitz PC
Carbone Lorraine Composants
Kruer Kevin R.
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