Cast molding die and process for producing information recording

Details Cast molding die and process for producing information recording Cast molding die and process for producing information recording

1991-12-20

1993-08-10

Chiesa, Richard L.

Plastic and nonmetallic article shaping or treating: processes

Optical article shaping or treating

Utilizing plasma, electric, electromagnetic, particulate, or...

249116, 249135, 264107, 425394, 425411, 425542, 425810, B29C 3342

Patent

active

052346331

ABSTRACT:
There is provided a cast molding die for an information recording medium, having a mold surface with a prescribed unevenness pattern including a projection; wherein the projection has at least one pair of opposite side slopes each of which forms an acute angle with respect to the extension of the mold surface. By using the cast molding die having the above-mentioned projection with a three-dimensional shape, a defect such as lack in the resultant information recording medium is prevented.

REFERENCES:
patent: 4230915 (1980-10-01), Dil et al.
patent: 4408319 (1983-10-01), Tsunoda
patent: 4478768 (1984-10-01), Takeoka
patent: 4565772 (1986-01-01), Takeoka
IBM Technical Disclosure Bulletin, vol. 30, No. 5 (1987), 306:311.
Patent Abstracts of Japan, vol. 9, No. 111 (M-379) (1985).
Ahrens, Funkschau, No. 21 (1982), Herstellung einer LV-Bildplatte, 65:68.
M. Echlseder et al, Ind & Prod. Eng, vol. 11, No. 3 (1987), 150:153.

Affiliated with

Also associated with

Rating

Cast molding die and process for producing information recording does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Cast molding die and process for producing information recording, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Cast molding die and process for producing information recording will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1723401