Plastic article or earthenware shaping or treating: apparatus – Air felting type shaping means
Reexamination Certificate
2006-01-10
2006-01-10
Davis, Robert (Department: 1722)
Plastic article or earthenware shaping or treating: apparatus
Air felting type shaping means
C425S355000, C425S408000, C425S416000
Reexamination Certificate
active
06984117
ABSTRACT:
An apparatus and methods of manufacturing seamless gaskets using expanded intercalated graphite worms, in which an annular die cavity has a central column with a charge inlet in a perimeter wall. Expanded intercalated graphite worms communicate from a source through the charge inlet in the annular die cavity for depositing a charge of expanded intercalated graphite worms within the die cavity. An upper pusher is movable from a first position distally spaced from an open end of the die cavity to a second position within the die cavity for compressing a first charge of expanded intercalated graphite worms. A lower pusher is movable from a first position to a second position during the compressing of the first charge of expanded intercalated graphite worms in the die. The upper pusher causes the lower pusher to move to the second position, so that a second charge of expanded intercalated graphite worms is received in substantially the same volume as the first charge. The upper pusher then compresses the second charge to form a seamless gasket.
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Supplemental European Search Report; Application NO. EP 99 93 2996.
Meyer Reid M.
Suggs Steven M.
Acadia Elastomers Corporation
Baker Donelson Bearman Caldwell & Berkowitz
Davis Robert
Nguyen Thu Khanh T.
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