Method of fabricating a light duct of thermoplastic material

Details Method of fabricating a light duct of thermoplastic material Method of fabricating a light duct of thermoplastic material

2004-11-02

2010-06-01

Nguyen, Khanh (Department: 1791)

Plastic and nonmetallic article shaping or treating: processes

Optical article shaping or treating

C264S328120, C264S328100, C264S001240

Reexamination Certificate

active

07727427

ABSTRACT:
A method of fabricating a light duct includes making the light duct as a single piece by injection molding a thermoplastic material in a mold (1) presenting a cavity of shape identical to that of the duct, the injection taking place through a feed orifice disposed on one side of said cavity over a face that is substantially parallel to the plane defined by axes (A-A′, B-B′), the feed orifice presenting a height h lying in the range 0.2 Hmaxand Hmax, and a length l lying in the range 0.2 Lmoyand 0.8 Lmoy, the thermoplastic material being injected at a rate lying in the range 400 mm3/s to 1500 mm3/s.

REFERENCES:
patent: 4778632 (1988-10-01), Bakalar
patent: 5415817 (1995-05-01), Shiao et al.
patent: 6023372 (2000-02-01), Spitzer et al.
patent: 6356392 (2002-03-01), Spitzer
patent: 2002/0091174 (2002-07-01), Soane et al.
patent: WO0079329 (2000-12-01), None
PCT Search Report- Mar. 30, 2005.

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