Plastic article or earthenware shaping or treating: apparatus – Preform severing means – Rotating means comprising circumferentially extending...
Reexamination Certificate
2006-02-14
2006-02-14
Heckenberg, Donald (Department: 1722)
Plastic article or earthenware shaping or treating: apparatus
Preform severing means
Rotating means comprising circumferentially extending...
C425S299000, C425S363000, C425S411000, C083S598000, C083S669000, C083S863000
Reexamination Certificate
active
06997696
ABSTRACT:
In a method and apparatus for cutting expanded graphite sheet material, at least one cutting tool is urged against the sheet(s). The cutting tool has at least one ridge extending therefrom that includes a substantially tapered cross-section having sloping sides and an edge surface. At least a portion of the sheet material is displaced as the ridge is urged against the sheet. A region of the sheet material in contact with the ridge is compressed so that the density of the region reaches or exceeds the breaking density of the sheet.
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Brown David
Davis Neil V.
Ballard Power Systems Inc.
Seed IP Law Group PLLC
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