Method of producing records

Details Method of producing records Method of producing records

G - Physics

11

B

G11B 3/68 (2006.01) B29C 59/02 (2006.01) G11B 3/70 (2006.01) B29C 43/00 (2006.01) B29C 43/24 (2006.01)

Patent

CA 2343196

The front surface of a calendar-formed sheet mainly consisting of vinyl resin is hardening-mirror-finished by press working and sound grooves are engraved in the finished front surface by cutting.

L'invention concerne la surface frontale d'une feuille en forme de calendrier constituée essentiellement de résine vinylique durcie et polie miroir à la presse. Les sillons sonores sont gravés par découpage sur la surface avant finie.

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