Four layer nozzle for forming four layer articles
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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Issued Date -
Aug 28, 2003
app pub date -
Jan 31, 2003
filing date -
Apr 6, 2001
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A nozzle for extruding an article has at least three layers of thermoplastic materials. A housing has a longitudinal axis. At least three extrusion dies are contained in the housing and aligned with the longitudinal axis. Each die has a face with a die channel in the face. Each die channel is a closed geometric figure. Each die channel has at least one inlet for receiving a respective thermoplastic material. Each die channel provides a respective outlet for feeding a respective one of the plurality of layers of thermoplastic materials to a respective flow channel within the housing. The flow channels deliver the plurality of layers so that at least three of the layers combine within the nozzle at substantially the same coordinate measured along the longitudinal axis.
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