Plastic and nonmetallic article shaping or treating: processes – Pore forming in situ – By gas forming or expanding
Patent
1984-03-29
1986-03-18
Anderson, Philip
Plastic and nonmetallic article shaping or treating: processes
Pore forming in situ
By gas forming or expanding
131345, 264321, 264DIG66, 425308, 425325, 425328, 425374, 425392, 425402, 425817R, B29C 6722, B29C 5904
Patent
active
045767696
ABSTRACT:
A method of sizing thermoplastic foamed cigarette filter rods and apparatus therefore. The apparatus comprises a rotating drum member having a plurality of stationary heated block members mounted about the periphery thereof. The block members are positioned such that a specific gap is created through which the thermoplastic polymeric filter rods are rolled and compressed to a uniform circumference.
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Anderson Philip
Blanke Robert J.
Celanese Corporation
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