Method of molding optical recording drums

Details Method of molding optical recording drums Method of molding optical recording drums

1990-09-17

1992-03-17

Lowe, James

Plastic and nonmetallic article shaping or treating: processes

Optical article shaping or treating

Composite or multiple layer

264 21, 264102, 264135, 264255, 264270, 264278, 264311, 264DIG6, B29D 1100, B29C 3908, B29C 3910, B29C 3912

Patent

active

050966278

ABSTRACT:
A method for fabricating in a mold a rotatable recording drum. Initially, the mold is rotated and a predetermined quantity of a flowable substance is poured into the mold cavity and is centrifugally flung against the mold wall to form a mold layer with a smooth inner surface. Next, a surface substance is poured into the mold cavity and is allowed to harden against the mold layer. A core outer layer substance is then poured into the mold cavity and allowed to harden against the surface substance, and rotation of the mold is stopped. The mold layer fluid is removed, and the cavity inside the outer layer is filled with a core inner layer substance which is allowed to harden before the drum core is removed from the mold cavity. Following removal of the core from the mold cavity, the hardened surface substance may be vacuum coated, and a protective overcoat applied to the core. The drum core and the surface substance can also be formed separately.

REFERENCES:
patent: 3365351 (1968-01-01), Maaz et al.
patent: 3383662 (1968-05-01), Spieker et al.
patent: 3408634 (1968-10-01), Lee et al.
patent: 3440119 (1969-04-01), Spieker
patent: 3500343 (1970-03-01), Spieker
patent: 3691263 (1972-09-01), Stoy et al.
patent: 4416837 (1983-11-01), Neefe
patent: 4534915 (1985-08-01), Neefe
patent: 4637791 (1987-01-01), Neefe
patent: 4659522 (1987-04-01), Neefe

Affiliated with

Also associated with

Rating

Method of molding optical recording drums does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method of molding optical recording drums, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method of molding optical recording drums will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1473898