A strengthened glass sheet is separated into undamaged sheet segments by mechanically scribing one or more vent lines of controlled depth into the sheet surface, the depths of the scribed lines being insufficient to effect sheet separation, and then applying a uniform bending moment across the vent lines to effect separation into multiple sheet segments, the vent lines being scribed from crack initiation sites comprising surface indentations formed proximate to the edges of the glass sheet.

A strengthened glass sheet is separated into undamaged sheet segments by mechanically scribing one or more vent lines of controlled depth into the sheet surface, the depths of the scribed lines being insufficient to effect sheet separation, and then applying a uniform bending moment across the vent lines to effect separation into multiple sheet segments, the vent lines being scribed from crack initiation sites comprising surface indentations formed proximate to the edges of the glass sheet.

An edge defect gauge that measures a size of edge defects of glass sheets, the edge defect gauge comprising: a body including opposite end edges and opposite side edges that extend between the end edges forming a body, the body having opposite flat faces; and at least one of (i) a dog ear measuring projection extending outward from one of the end edges at one of the side edges, the dog ear measuring projection having a predetermined height and a predetermined length or (ii) a cantilever measuring recess extending inward from the other end edge at the one of the side edges, the cantilever measuring recess having a predetermined height and a predetermined length.

Methods of processing a glass ribbon are provided. The method includes the step of traversing the glass ribbon through a travel path at a predetermined velocity and severing the glass ribbon to create an upstream web and a downstream web. The method further includes the step of increasing a relative velocity of a downstream edge portion with respect to an upstream edge portion to create a gap between an upstream severed edge and a downstream severed edge. In other example methods, a segment of the glass ribbon is removed to create a gap between an upstream severed edge and a downstream severed edge. In still further example methods, an upstream severed edge is directed along a second travel path to create a gap between the upstream severed edge and a downstream severed edge.

Methods of processing a glass ribbon are provided. The method includes the step of traversing the glass ribbon through a travel path at a predetermined velocity and severing the glass ribbon to create an upstream web and a downstream web. The method further includes the step of increasing a relative velocity of a downstream edge portion with respect to an upstream edge portion to create a gap between an upstream severed edge and a downstream severed edge. In other example methods, a segment of the glass ribbon is removed to create a gap between an upstream severed edge and a downstream severed edge. In still further example methods, an upstream severed edge is directed along a second travel path to create a gap between the upstream severed edge and a downstream severed edge.

The present application discloses a cutting method and a cutting machine table for cutting a substrate, where the cutting method includes following steps: cutting a large substrate to be cut to obtain a finished substrate falling on a second cutting machine table; after the cutting, driving the second cutting machine table according to a preset parameter to enable a driving-away height difference to be formed between the second cutting machine table and the first cutting machine table; driving the second cutting machine table away from the first cutting machine table; and resetting the second cutting machine table to an initial state.

The invention discloses a liquid crystal screen glass cutting method and apparatus to solve the unhealthy problem of being broken or serrated to be produced for the liquid crystal screen glass at intersections of cutting marks in different directions in the cutting procedure. This liquid crystal screen glass cutting method comprises: a cutter wheel cutting a first surface of the liquid crystal screen glass along a first direction for the first time to form first cutting marks on the liquid crystal screen glass; and after the completion of the first-time cutting, the cutter wheel cutting the first surface of the liquid crystal screen glass along a second direction for the second time, wherein when the distance from a first cutting mark equals a cutter-out distance, the cutter wheel rises a jump height perpendicularly to the liquid crystal screen glass and keeping the jump height, travels a stroke along the second direction which is a sum of the cutter-out distance and a cutter-in distance, then descends perpendicularly to the liquid crystal screen glass to the liquid crystal screen glass and continues to cut the liquid crystal screen glass along the second direction, until second cutting marks are formed on the first surface, wherein the second direction is perpendicular to the first direction.

The invention discloses a liquid crystal screen glass cutting method and apparatus to solve the unhealthy problem of being broken or serrated to be produced for the liquid crystal screen glass at intersections of cutting marks in different directions in the cutting procedure. This liquid crystal screen glass cutting method comprises: a cutter wheel cutting a first surface of the liquid crystal screen glass along a first direction for the first time to form first cutting marks on the liquid crystal screen glass; and after the completion of the first-time cutting, the cutter wheel cutting the first surface of the liquid crystal screen glass along a second direction for the second time, wherein when the distance from a first cutting mark equals a cutter-out distance, the cutter wheel rises a jump height perpendicularly to the liquid crystal screen glass and keeping the jump height, travels a stroke along the second direction which is a sum of the cutter-out distance and a cutter-in distance, then descends perpendicularly to the liquid crystal screen glass to the liquid crystal screen glass and continues to cut the liquid crystal screen glass along the second direction, until second cutting marks are formed on the first surface, wherein the second direction is perpendicular to the first direction.

The method includes tracing a score line on the surface of the glass, using a scoring tool, and breaking out using a local pressure system applied on the opposite face and opposite the score line, the local pressure system being moved and pressed along the score line on the opposite face.

The method includes tracing a score line on the surface of the glass, using a scoring tool, and breaking out using a local pressure system applied on the opposite face and opposite the score line, the local pressure system being moved and pressed along the score line on the opposite face.