Disc record preparation

Details Disc record preparation Disc record preparation

1980-12-11

1982-09-14

Pavelko, Thomas P.

Plastic and nonmetallic article shaping or treating: processes

Forming sound grooves in records

Die pressing disk type records

425810, B29D 1700

Patent

active

043494994

ABSTRACT:
A method for manufacturing modulated disc records (i.e. video or audio records) including bonding a plastics material foil to the unmodulated face of a stamper plate before the stamper plate is secured between the rams of the record press. This method obviates the necessity for backsanding the stamper plate, as hitherto adopted procedure which was time consuming, unreliable and often hazardous.

REFERENCES:
patent: 4231730 (1980-11-01), Birt
patent: 4238179 (1980-12-01), Llobres et al.
patent: 4243367 (1981-01-01), Renoux

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