Apparatus for manufacturing a disc-shaped information carrier

Details Apparatus for manufacturing a disc-shaped information carrier Apparatus for manufacturing a disc-shaped information carrier

1992-11-23

1994-02-08

Bushey, Charles S.

Plastic article or earthenware shaping or treating: apparatus

Preform reshaping or resizing means: or vulcanizing means...

Surface deformation means only

264107, 425394, 425396, 425810, B29C 5902

Patent

active

052844358

ABSTRACT:
An apparatus for manufacturing an object having a relief structure on a surface thereof by pressing a first element provided with a negative of the relief structure against a second element to form the relief structure in the surface of the second element. The apparatus includes the first element and two pressure members having pressure surfaces facing each other and opposing both of the elements, the pressure members being moveable relative to each other in a direction transverse to the pressure surfaces. The apparatus also has a pressure body secured to the pressure surface of at least one of the pressure member, having a contact surface for cooperation with one of the elements and being formed of a material whose quotient of its Poissons' ratio to its modules of elasticity differs less from the corresponding quotient of the material of the element cooperating with said contact surface in operation than from the corresponding quotient of the material of the pressure member to which the pressure body is secured.

REFERENCES:
patent: 4302175 (1981-11-01), McNeely
patent: 4312823 (1982-01-01), Kraakman et al.
patent: 4315723 (1982-02-01), Antoine et al.
patent: 4783041 (1988-11-01), Sakaida et al.
patent: 4954841 (1990-09-01), Ichihara et al.
patent: 5174937 (1992-12-01), Tamura et al.
patent: 5180595 (1993-01-01), Kinoshita

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