B - Operations – Transporting – 29 – C
Patent
B - Operations, Transporting
29
C
18/756
B29C 47/06 (2006.01) B29C 44/22 (2006.01) B29C 47/00 (2006.01)
Patent
CA 1205265
COEXTRUSION FEEDBLOCK FOR MAKING LIGHTWEIGHT, RIGID THERMOPLASTIC PIPE ABSTRACT Coextrusion feedblock apparatus for making multi- layer, lightweight pipe wherein means are provided to convert thermoplastic material into pipe or tubing having a plurality of layers. Means (12,28) are provid- ed for adjusting the feedblock apparatus to assure thickness uniformity of the inner layer of the pipe or tubing and further, means (13,30) are provided for adjusting overall wall thickness of the multilayer pipe or tubing.
442637
Borg-Warner Chemicals Inc.
Macrae & Co.
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