Deformable vacuum holder with helical coil springs for shaping g

Details Deformable vacuum holder with helical coil springs for shaping g Deformable vacuum holder with helical coil springs for shaping g

1983-05-24

1984-11-20

Kellogg, Arthur

Glass manufacturing

Glassworking or preform by or with reheating means

Planar sheet preform

65106, 65287, 294 64R, 414121, C03B 23035

Patent

active

044837038

ABSTRACT:
A deformable vacuum holder used in the shaping of sheets of glass or other deformable materials is provided with a plurality of longitudinally extending helical coil springs that enhance the durability of the deformable vacuum holder. When the outer diameter of the springs approximates the thickness of a chamber comprising said holder, the springs improve the resistance of the holder to collapse in response to the application of vacuum to said holder.

REFERENCES:
patent: 4277276 (1981-07-01), Kellar et al.
patent: 4297118 (1981-10-01), Kellar et al.
patent: 4349375 (1982-09-01), Kellar et al.
patent: 4430110 (1984-02-01), Frank et al.

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