Plastic article or earthenware shaping or treating: apparatus – Including ventilating type hood or chamber encasing a... – Material handler is endless casting surface
Reexamination Certificate
2006-02-07
2006-02-07
Del Sole, Joseph S. (Department: 1722)
Plastic article or earthenware shaping or treating: apparatus
Including ventilating type hood or chamber encasing a...
Material handler is endless casting surface
C425S224000
Reexamination Certificate
active
06994533
ABSTRACT:
A method and apparatus for producing microporous films. The method utilizes a casting surface and a condensing surface. The condensing surface is spaced from the casting surface to form a gap. The distance between the surfaces forming the gap is relatively small and is preferably less than 3 cm. A material, capable of forming microporous films through thermally induced phase separation processes, is cast onto the casting surface, preferably through conventional extrusion practices. The material contains at least one evaporative component that generally flashes off upon formation of the microporous material and condenses on the condensing surface.
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Hughes Shannon K.
Kolb William Blake
Yapel Robert A.
3M Innovative Properties Company
Del Sole Joseph S.
Szymanski Brian E.
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