Plastic article or earthenware shaping or treating: apparatus – Distinct means to feed – support or manipulate preform stock... – Extrusion shaping means
Patent
1988-03-11
1989-10-10
Housel, James C.
Plastic article or earthenware shaping or treating: apparatus
Distinct means to feed, support or manipulate preform stock...
Extrusion shaping means
226177, 264 15, 425321, 425380, 425391, 425467, B29C 4702, G02B 644
Patent
active
048728241
ABSTRACT:
Apparatus for making a grooved support member for carrying optical fibers having an extrusion die for forming a plastics sheath upon a strength member so as to form the support member. The die aperture has projections extending into it so as to form the grooves in the support member. To form the grooves into sinuous configuration, a twisting device is located upstream from the die. The twisting device comprises a plurality of gripping wheels on each side of the passline of the strength member, the gripping wheels staggered along the passline. The gripping wheels are rotatable alternately in opposite directions around the passline.
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Smith Randall J.
Williams Robert J.
Austin R. J.
Housel James C.
Northern Telecom Limited
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