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US 11,427,494 B2Granted
Tempering furnace and method for tempering a glass object
AssigneeVosstech AS
InventorStig Ove Bjørgum
Life of this patent
Estimating the term…
Abstract
A tempering furnace for tempering a glass object may include a housing, a heating device for heating the glass object, and a cooling device for cooling the glass object. Additionally, the tempering furnace may further include a turning device provided for turning the glass object inside the housing. The turning device is configured to counteract an effect of gravitational forces on the glass object when the glass object is heated to its softening phase.
Claims3
A method of tempering a glass object, wherein the glass object comprises a circular surface and chamfered surfaces, comprising:
- heating the glass object, wherein the heating comprises heating the glass object until the glass object reaches a softening phase;
- cooling the glass object;
- turning the glass object during heating of the glass object, wherein the turning of the glass object is performed to counteract an effect of gravitational forces on the glass object when the glass object is heated to the softening phase;
- and
- turning the glass object during the cooling of the glass object,
- wherein the turning during heating and cooling of the glass object comprises the chamfered surfaces of the glass object being in contact with first and second rotating rollers, and
- wherein the first and second rotating rollers have an hourglass shape for contact with the chamfered surfaces.
4 more elements
Dependencies are inferred from the claim text.