Method for changing the boundary surface tension of a liquid glass piece and apparatus for performing said method
AssigneeSchott AG
InventorsUlrike Stoehr, Olaf Claussen, Ralf-Dieter Werner
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Abstract
The process according to the invention reduces the effort required to shape a glass piece. In this process a liquid glass piece is provided on a structured supporting surface of an electrically conducting base. A voltage is applied across the liquid glass piece by connecting a voltage source between a contact position on the liquid glass piece and the electrically conducting base. The apparatus for performing the process has an electrically conducting base on which the liquid glass piece is supported and a device for applying a voltage between a contact position on the liquid glass piece and the electrically conducting base.
Claims6
A process for changing a boundary surface tension of a liquid glass piece, said process comprising the steps of:
- a) placing the liquid glass piece on an electrically conducting base;
- b) applying an electrical potential to the liquid glass piece resting on the electrically conducting base at a contact position on the liquid glass piece;
- and
- c) heating the liquid glass piece on the electrically conducting base.
An apparatus for changing a boundary surface tension of a liquid glass piece, said apparatus comprising
- an electrically conducting base on which the liquid glass piece rests;
- and
- electrical contacting means connectable electrically to the liquid glass piece to apply an electrical potential to the liquid glass piece;
- wherein the electrical conducting base is formed for heating the liquid glass piece.
Dependencies are inferred from the claim text.