Process for producing leaves for leaf seal

Metal working – Method of mechanical manufacture – Prime mover or fluid pump making

Reexamination Certificate

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C029S557000, C216S056000, C216S100000, C277S355000, C277S412000

Reexamination Certificate



In a process for producing leaves (20, 20′) for a leaf seal, in particular as a seal for a gas turbine, which leaves (20, 20′) are laterally delimited by a peripheral edge contour and have regions of different thicknesses (d1, d2), a simplification, without sacrificing precision, is achieved by virtue of the edge contour of the leaves (20, 20′) being cut out of a metal sheet (28) by an etching process and the regions of different thicknesses (d1, d2) also being produced simultaneously as part of the etching process.

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patent: 2004/0232621 (2004-11-01), Kono
patent: 2007/0102886 (2007-05-01), Uehara et al.
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patent: 2021210 (1979-11-01), None
patent: WO03/072287 (2003-09-01), None
patent: WO2005/103534 (2005-11-01), None
patent: WO2005/103535 (2005-11-01), None
patent: WO2005/103536 (2005-11-01), None
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