Process for producing information recording discs

Details Process for producing information recording discs Process for producing information recording discs

1988-07-27

1990-03-20

Wityshyn, Michael

Adhesive bonding and miscellaneous chemical manufacture

Methods

Surface bonding and/or assembly therefor

156292, 156300, 1565802, 3461351, 346137, 369286, B29C 6508, G11B 370

Patent

active

049098713

ABSTRACT:
A process for producing an information recording disc of an air sandwich structure by ultrasonic welding two disc substrates, at least one of which has a recording medium containing layer, to each other through outer and inner peripheral spacers lying therebetween, which process is characterized in that the outer peripheral spacer is first welded to the disc substrate on one side, the disc substrate on the other side is then superposed through the inner peripheral spacer on said outer peripheral spacer-welded disc substrate turned inside out, and said outer peripheral spacer and disc substrate on the other side, and said inner peripheral spacer and disc substrates on both sides are ultrasonic welded together simultaneously.

REFERENCES:
patent: 4564932 (1986-01-01), Lange 156 73.1

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