Plastic and nonmetallic article shaping or treating: processes – Forming continuous or indefinite length work – Layered – stratified traversely of length – or multiphase...
Patent
1996-07-23
2000-01-25
Silbaugh, Jan H.
Plastic and nonmetallic article shaping or treating: processes
Forming continuous or indefinite length work
Layered, stratified traversely of length, or multiphase...
26417317, 26417719, 264237, 264348, 264568, B29C 4706, B29C 4720
Patent
active
060174773
ABSTRACT:
Extrusion apparatus is employed in a co-extrusion process to produce a triangular-shaped barrel for a writing instrument. An inner layer of material is extruded in tubular form having a substantially circular cross-section. A coating layer of three strips of material, equally spaced one from the other, is co-extruded about the outer periphery of the inner layer. A combination of forces produced during the process is effective to distort the inner layer to form a product having a substantially triangular shape.
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Lu Gary
Rao Ganesh V.
Tseng Mingchih M.
Brine Aubrey C.
Cekala Chester
Eashoo Mark
Silbaugh Jan H.
The Gillette Company
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