Plastic and nonmetallic article shaping or treating: processes – Forming continuous or indefinite length work – Layered – stratified traversely of length – or multiphase...
Patent
1997-06-10
1998-05-12
Tentoni, Leo B.
Plastic and nonmetallic article shaping or treating: processes
Forming continuous or indefinite length work
Layered, stratified traversely of length, or multiphase...
216 83, 425463, D01D 406, D01F 804
Patent
active
057500630
ABSTRACT:
A sheath/core-switching device contains a first plate(s) having a first flow path and a second plate(s) having a second flow path. The first flow path contains a first chamber, a first central-port, and multiple first channels with multiple first outer-ports radially disposed around the first central-port. The second flow path contains a second chamber, multiple second channels having multiple second outer-ports, and multiple third channels having multiple second central-ports which are radially disposed around the second central-ports. The sheath and core phases of a sheath/core fluid stream can be switched by means of the device by directing the stream axially to the first chamber where the stream is split into a core-stream and multiple sheath-substreams. The core-stream flows through the first central-port to the second chamber. The sheath-substreams flow through the first channels and first outer-ports to the third channels. In the second chamber, the core-stream splits into multiple core-substreams which flow through the second channels and second outer-ports. The sheath-substreams flow through the third channels and second central-ports. The core-substreams exiting the second outer-ports and the sheath-substreams exiting the second central-ports are disposed in a sheath/core configuration, the sheath-substreams forming the core and the core-substreams forming the sheath.
REFERENCES:
patent: 3787162 (1974-01-01), Cheetham
patent: 4381274 (1983-04-01), Kessler
patent: 4406850 (1983-09-01), Hills
patent: 4445833 (1984-05-01), Moriki et al.
patent: 5162074 (1992-11-01), Hills
BASF Corporation
Tentoni Leo B.
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