Method for vacuum forming dishes from a ribbon

Details Method for vacuum forming dishes from a ribbon Method for vacuum forming dishes from a ribbon

1993-09-30

1995-10-24

Alvo, Steve

Glass manufacturing

Processes

Forming product or preform from molten glass

65101, 65177, 65 97, 65 70, 65 71, C03B 1301

Patent

active

054606381

ABSTRACT:
A method and apparatus for producing a glass ware, such as a bowl or plate, via vacuum forming. A deformable glass ribbon is passed through a pair of parallel rolls or rollers, one of the rollers having a recessed cavity thereon for forming a thicker product zone and a thinner cullet zone on the glass ribbon. The product zone may be specifically configured to compensate for process stretching of the glass ribbon during the vacuum forming process. The product zone is registered over a vacuum mold, and a vacuum is applied to the mold to thereby deform the glass to a concave shape and thus form the dish. The dish is separated from the glass ribbon by trimming at the periphery of the dish.

REFERENCES:
patent: 1178257 (1916-04-01), Haley
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patent: 3231356 (1966-01-01), Giffen
patent: 3528791 (1970-09-01), Giffen
patent: 3552941 (1971-01-01), Giffen
patent: 3582454 (1971-06-01), Giffen
patent: 4361429 (1982-11-01), Anderson
patent: 4605429 (1986-08-01), Rajnik

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