Process for the manufacture of rods of thermoplastic material, h

Details Process for the manufacture of rods of thermoplastic material, h Process for the manufacture of rods of thermoplastic material, h

1974-05-13

1976-01-20

Cannon, J. C.

Plastic and nonmetallic article shaping or treating: processes

Forming continuous or indefinite length work

Shaping by extrusion

15445, 264150, 264151, 264209, 264210F, 401198, 401199, 401265, 401284, 401292, 428 36, 428376, 428397, 428398, B28B 2152, B43K 802, D01D 512

Patent

active

039339653

ABSTRACT:
Pen nibs are made by extruding rods from fused thermoplastic material, with a cavity in the rod of star-shaped cross-sectional configuration. The extruded rod is then cooled and mechanically drawn to reduce its diameter about 50%, which closes the inner ends of the arms of the star and brings them together at the center of the rod, while leaving the outer ends of the arms relatively large. The resulting product is then sharpened at both ends for use as a pen nib.

REFERENCES:
patent: 3113336 (1963-12-01), Langnickel
patent: 3338216 (1967-08-01), Roller
patent: 3518019 (1970-06-01), Kakamura
patent: 3520629 (1970-07-01), Otsuka
patent: 3538208 (1970-11-01), Otsuka
patent: 3586454 (1971-06-01), Funakashi
patent: 3604817 (1971-09-01), Funakashi
patent: 3614247 (1971-10-01), Otsuka
patent: 3614248 (1971-10-01), Otsuka
patent: 3687561 (1972-08-01), Phillips
patent: 3718401 (1973-02-01), Kiriu
patent: 3729270 (1973-04-01), Nakano
patent: 3744923 (1973-07-01), Bok
patent: 3778495 (1973-12-01), Woolley
patent: 3830576 (1974-08-01), Kohno et al.

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