Vacuum holder with anti-bulging means used to shape glass sheets

Details Vacuum holder with anti-bulging means used to shape glass sheets Vacuum holder with anti-bulging means used to shape glass sheets

1983-05-24

1985-04-16

Kellogg, Arthur

Glass manufacturing

Preform reshaping means

Sheet bending mold

65104, 65106, 65273, 294 641, 414121, C03B 23035

Patent

active

045113874

ABSTRACT:
A vacuum holder for holding sheets of heat-softenable material such as glass thereagainst by vacuum during their fabrication into shaped sheets comprising a lower sheet wall that has flanking portions slit longitudinally to provide strips extending longitudinally from a central portion, the width of the strips being limited to limit transverse bulging as the holder becomes hot during a sheet shaping campaign. Longitudinal slots of increasing length from a selected transverse line, preferably one traversing the geometric center of the sheet, control longitudinal bulging of the holder.

REFERENCES:
patent: 3477839 (1969-11-01), Misson
patent: 4229199 (1980-10-01), Seymour
patent: 4277276 (1981-07-01), Kellar et al.
patent: 4282026 (1981-08-01), McMaster et al.
patent: 4297118 (1981-10-01), Kellar et al.
patent: 4349375 (1982-09-01), Kellar et al.

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