Metal working – Method of mechanical manufacture – Electrical device making
Reexamination Certificate
2004-03-09
2009-08-04
Phan, Thiem (Department: 3729)
Metal working
Method of mechanical manufacture
Electrical device making
C029S411000, C029S623300, C029S623500, C029S730000, C029S832000, C198S449000, C271S005000, C271S009040, C414S789600, C414S793100, C430S256000, C430S258000
Reexamination Certificate
active
07569081
ABSTRACT:
A method is provided for automated converting of a web of a thin patterned catalyst-coated membrane to separate membrane sheets for fuel cell assembly. The membrane typically has a thickness of about one thousandth of an inch. Automated web converting involves transporting, with use of a movable vacuum, an end portion of the membrane web from a first location to a second location. With use of respective first and second vacuums at the first and second locations, and after removal of the movable vacuum, the end portion of the membrane web is releasably secured at the first and second locations. The membrane web is cut within a gap defined between a single catalyst pattern of the membrane web end portion and an adjacent catalyst pattern to produce a membrane sheet. The membrane sheet is precisely positioned to a desired orientation to facilitate subsequent processing of the membrane sheet.
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Mlinar John Russell
Schukar Gary William
Smith Mark Hyland
Spicer Steven Mark
3M Innovative Properties Company
Dahl Philip Y.
Phan Thiem
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