Back to results
US 3,945,790 AGranted
Pressing device for manufacturing of storage substrates
AssigneeThomson-CSF
InventorClaude Puech
Life of this patent
Estimating the term…
Abstract
A device for pressing storage substrates made of thermoplastic material. It comprises: a press having two plates, a matrix attached to one of the plates, the matrix carrying the data to be stored in said substrate, and, arranged between the plates, one rubber sheet, on polyethyleneterephtalate sheet and a metal film. The superimposition of these different materials ensuring a properly uniform pressure over the substrate.
Claims13
A device for pressing thermoplastic material, designed to transfer to said thermoplastic material an impression carried by a rigid matrix, and comprising:
- a press having two rigid, first and second parallel plates, said matrix being attached to the first of said plates;
- heater means designed to raise said thermoplastic material to its impression temperature;
- means for uniformly distributing a pressure over the whole surface of said thermoplastic material, arranged between said thermoplastic material and the second of said plates, thus preventing any transverse displacements of said thermoplastic material during the pressing operation.
Dependencies are inferred from the claim text.