Process for improving the surface finish of glass foils

Details Process for improving the surface finish of glass foils Process for improving the surface finish of glass foils

1986-01-15

1987-08-11

Lowe, James

Glass manufacturing

Processes

Reshaping or surface deformation of glass preform

65 92, 65104, 6537413, 65DIG5, C03B 2302

Patent

active

046859500

ABSTRACT:
In a process for improving the smoothness of the surfaces of foils made from thermoplastics materials, particularly glass, the foil is stretched in two directions or dimensions. In a particular method, the foil is laid on top of a first frame and subsequently heated to a temperature which lies in a temperature range within which the foil starts to soften. A second frame which is at the same temperature as that of the foil is then placed on top of the foil so that the latter is effectively clamped between the frames. The two frames and foil is then cooled. The material chosen for the frames is one having a coefficient of thermal expansion smaller than or equal to that of the material of the foil.

REFERENCES:
patent: 2897546 (1959-08-01), Clapp et al.
patent: 2918696 (1959-12-01), Bottoms et al.
patent: 3308215 (1967-03-01), Last
patent: 3894137 (1975-07-01), Moench
patent: 4278723 (1981-07-01), Moench et al.
patent: 4591373 (1986-05-01), Sato

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