Glasses with improved ion exchangeability
US-12570570-B2 · Mar 10, 2026 · US
Process and apparatus for producing flat glass
US2026092002A1 · US · A1
| Field | Value |
|---|---|
| Publication number | US-2026092002-A1 |
| Application number | US-202519341153-A |
| Country | US |
| Kind code | A1 |
| Filing date | Sep 26, 2025 |
| Priority date | Sep 27, 2024 |
| Publication date | Apr 2, 2026 |
| Grant date | — |
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Abstract
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A process includes directing a laser beam at a glass strip so it traverses a line in a drawing direction of the horizontally moving glass strip. A point of incidence of the laser beam is chosen so the line forms an envisaged dividing line between a useful region and a thickened edge region and the point of incidence on the glass is at a position where a temperature of the glass is within a range between an upper viscosity of 10 10 dPas and a lower viscosity of 10 15 dPas. The laser beam photothermally processes the glass strip so a gap is formed along the line between the useful region and the thickened edge region to obtain a glass strip with a homogeneous glass thickness and a new edge parallel to the drawing direction and a separated thickened edge region. The glass strip with homogeneous thickness is cooled after separation.
First claim
Opening claim text (preview).
What is claimed is: 1 . A process for producing a glass strip with homogeneous glass thickness, the process comprising: obtaining a glass strip from a melt by a drawing process, wherein the glass strip has a useful region and thickened edge regions with respect to the useful region which extend along edges of the glass strip in a drawing direction; cooling the glass strip, wherein during the cooling, a laser beam is directed at the glass strip by at least one laser such that it traverses a line in the drawing direction of the horizontally moving glass strip owing to a movement of the glass strip, wherein a point of incidence of the laser beam is chosen such that the line forms an envisaged dividing line between the useful region and the thickened edge region and the point of incidence on the glass is at a position where a temperature of the glass is within a range between an upper viscosity of 10 10 dPas and a lower viscosity of 10 15 dPas, wherein the laser beam photothermally processes the glass strip in an irradiated region such that a gap is formed along the line between the useful region and the thickened edge region and a glass strip with a homogeneous glass thickness and a new edge parallel to the drawing direction and a separated thickened edge region is obtained, and wherein the cooling of the glass strip with homogeneous thickness is continued after separation; wherein the useful region of the glass strip has a thickness of more than 0.3 mm, or wherein the useful region of the glass strip has a thickness of more than 0.1 mm and the drawing process comprises a float process and the glass strip is lifted from a float bath, or wherein the glass strip is subject to the following condition: F B = α l i q + α 2 0 - 3 0 0 30 · 10 - 6 / K · ( 4 . 6 log ( η l i q / dPas ) ) 2 · d T d log ( η ) ( log ( η / dPas ) = 1 3 ) - 28 ° C . · T 1 3 650 ° C . > 1 where α liq =a linear coefficient of thermal expansion above a glass transformation temperature of the glass, α 20-300 =a linear coefficient of thermal expansion of the glass at temperatures between 20° C. and 300° C., η liq =a liquidus viscosity of the glass, d T d log ( η ) ( log ( η ) = 13 ) = a
Assignees
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Classifications
Scoring using a focussed radiation beam, e.g. laser · CPC title
involving a focussed radiation beam, e.g. lasers · CPC title
- C03B15/02Primary
Drawing glass sheets · CPC title
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- What does patent US2026092002A1 cover?
- A process includes directing a laser beam at a glass strip so it traverses a line in a drawing direction of the horizontally moving glass strip. A point of incidence of the laser beam is chosen so the line forms an envisaged dividing line between a useful region and a thickened edge region and the point of incidence on the glass is at a position where a temperature of the glass is within a rang…
- Who is the assignee on this patent?
- Schott Ag, Schott Technical Glass Solutions Gmbh
- What technology area does this patent fall under?
- Primary CPC classification C03B15/02. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Thu Apr 02 2026 00:00:00 GMT+0000 (Coordinated Universal Time) (A1). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).