B - Operations – Transporting – 29 – C
Patent
B - Operations, Transporting
29
C
18/509
B29C 49/48 (2006.01) B29C 49/76 (2006.01)
Patent
CA 1202156
ABSTRACT There is provided a new and useful method for producing in a cylindrical thermoplastic material an internal thread comprising blow molding the thermoplastic material in a mold in which the surface of the mold defining the outer face of the thread is at a negative angle of at least 5 degrees to the planes perpendicular to the axis of the cylindrical material.
449463
Biermann Paul J.
Ridout & Maybee Llp
LandOfFree
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