Method and knife for separating a glass pane from a spacer

The oscillating knife method effectively separates spacers from glass panes by minimizing glass contact, addressing inefficiencies and breakage in existing methods, ensuring quick and residue-free spacer removal for both tempered and untempered glass.

EP4563784B1Active Publication Date: 2026-06-17SYN2TEC EU
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Patent Information

Authority / Receiving Office
EP · EP
Patent Type
Patents
Current Assignee / Owner
SYN2TEC EU
Filing Date
2024-11-29
Publication Date
2026-06-17

AI Technical Summary

Technical Problem

Existing methods for separating glass panes from spacers in insulating glass units are inefficient, time-consuming, prone to breakage, and often damage the glass surfaces, especially when dealing with coated or tempered glass.

Method used

A method using an oscillating knife positioned outside the spacer and pivoted at an acute angle to the glass surface, which penetrates the spacer along its longitudinal extent while oscillating, minimizing contact with the glass to reduce breakage and residue.

Benefits of technology

The method allows for quick, residue-free separation of spacers from glass panes without damaging the glass, suitable for both tempered and untempered glass, and can handle spacers with flexible or rigid frames, reducing the risk of glass breakage and preserving sensitive coatings.

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Abstract

A method for separating a glass pane (1) of an insulating glass element from a spacer (2) arranged laterally on an inner surface (5) of the glass pane (1), wherein the spacer (2) is glued to the inner surface (5) of the glass pane (1), comprising: • a separating step in which the spacer (2) is severed at least partially, preferably entirely, by an oscillating knife (8) penetrating the spacer (2) along a longitudinal extent (L) of the spacer (2) and transversely to the longitudinal extent (L), while the oscillating knife (8) moves in the cutting direction (S) of the knife (8) along the longitudinal extent (L) of the spacer (2) relative to the glass pane (1), • positioning the knife (1) before penetrating the spacer (2), wherein the knife (8) is positioned outside the spacer (2) and at a distance from the inner surface (5). or• and moving the oscillating knife (8) penetrating into the spacer (2) with its knife blade (13) in the direction of the inner surface (5) until a predefined distance of the knife blade (13) to the inner surface (5) is reached.
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