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US 5,902,368 AGranted
Method for the heat-softened severance of glass tubes or plates
AssigneeSchott Glaswerke
InventorsAndre Witzmann, Ulla Trinks
Life of this patent
Estimating the term…
Abstract
Disclosed is a method for the heat-softened severance of thin-walled glass tubes or plates with a wall thickness of no more than 0.2 mm, wherein the glass is softened on a width of no more than 0.4 mm, the softened area is reduced by drawing to a wall thickness of no more than 0.05 mm, and then is separated by additional heating in the drawn-out area.
Claims18
A method for heat-softened severance of a glass tube or plate comprising:
- providing a glass tube having a wall thickness of no more than about 0.2 mm or a glass plate having a thickness of no more than about 0.2 mm;
- heat-softening the glass tube or plate over an area having a severance point;
- forming a drawn area and reducing the tube wall thickness or plate thickness in the heat-softened area by drawing to a thickness of no more than about 0.05 mm;
- and severing said tube or plate in the drawn area by further heating without formation of a bead that has a thickness greater than the thickness of the plate or the wall of the tube.
1 more element
Dependencies are inferred from the claim text.