Method for vacuum forming dishes from a ribbon
US5460638A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 30, 1993 |
| Grant date | Oct 24, 1995 |
| Priority date | — |
| Expiry date | Sep 30, 2013 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P40/57
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.