Die assembly and process for production of multilayer...

Details Die assembly and process for production of multilayer... Die assembly and process for production of multilayer...

2011-04-19

2011-04-19

Del Sole, Joseph S (Department: 1743)

Plastic article or earthenware shaping or treating: apparatus

Means feeding fluent stock from plural sources to common...

Extrusion shaping means

C425S38200R, C425S463000, C425S466000

Reexamination Certificate

active

07927088

ABSTRACT:
In a die assembly, plural pairs of extrusion ports are set up on concentric circles different in diameter. The die assembly is also provided with a core material feeding layer which spreads in such a planar state as to be connected to all core material extruding passageways and a sheath material feeding layer which spreads in such a planar state as to be connected to all sheath material extruding passageways and the core material and the sheath material are fed through the passageways. This constitution makes it possible to set up extrusion ports in arbitrary positions corresponding to the core material feeding layer and the sheath material feeding layer which each spread in a planar state, which enables simultaneous production of more multilayer extrusions while inhibiting the enlargement of the assembly.

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Office Action issued on Aug. 17, 2010 for Japanese Application No. 2005-092272.

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