This application relates to a method and system for cutting a brittle body. In one aspect the method includes preparing a brittle body having a rotary shaft. The method may also include forming a scribing line by irradiating laser on the brittle body along a preset route by using a laser irradiation unit. The method may further include cutting the brittle body by bringing a vibration unit that vibrates at a preset frequency in contact with a first region of the brittle body, which is spaced apart from the scribing line.

A method of separating an edge strip of a sheet of brittle material using a handheld sheet edge strip separation device is provided. The method includes sliding an edge receiving channel of a separation body of the sheet edge strip separation device over an edge portion that includes an edge of the sheet of brittle material. The edge receiving channel has a fixed width and is integrally formed as part of the separation body. The sheet edge strip separation device is rotated to provide a force over an area of the edge portion. The edge strip is separated from a quality portion of the sheet of brittle material with the glass edge strip located in the edge receiving channel.

A method of separating an edge strip of a sheet of brittle material using a handheld sheet edge strip separation device is provided. The method includes sliding an edge receiving channel of a separation body of the sheet edge strip separation device over an edge portion that includes an edge of the sheet of brittle material. The edge receiving channel has a fixed width and is integrally formed as part of the separation body. The sheet edge strip separation device is rotated to provide a force over an area of the edge portion. The edge strip is separated from a quality portion of the sheet of brittle material with the glass edge strip located in the edge receiving channel.

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.

Method and apparatus for removing a peripheral portion of a glass sheet. The glass sheet is placed in a predetermined position. A score line is formed on a major surface of the glass sheet. The score line demarcates a central region and a peripheral portion. A push bar is moved in a direction of a back-up bar assembly such to contact the major surface along the peripheral portion. The push bar is further moved in the direction to cause the peripheral portion to separate from the central region, and then become captured between the push bar and the back-up bar assembly. With some embodiments, the glass sheet is vertically oriented and the peripheral portion is not constrained during formation of the score line.

Method and apparatus for removing a peripheral portion of a glass sheet. The glass sheet is placed in a predetermined position. A score line is formed on a major surface of the glass sheet. The score line demarcates a central region and a peripheral portion. A push bar is moved in a direction of a back-up bar assembly such to contact the major surface along the peripheral portion. The push bar is further moved in the direction to cause the peripheral portion to separate from the central region, and then become captured between the push bar and the back-up bar assembly. With some embodiments, the glass sheet is vertically oriented and the peripheral portion is not constrained during formation of the score line.

Provided is a method of manufacturing a glass sheet, which comprises a conveying step of conveying a glass sheet (G3) by holding an upper part of the glass sheet (G3) in a vertical posture. The conveying step comprises a first conveying step of conveying the glass sheet (G3) in a first direction along a direction perpendicular to a main surface of the glass sheet (G3), and a second conveying step of conveying the glass sheet (G3) in a second direction along a direction parallel to the main surface after the first conveying step. When a conveying direction of the glass sheet is changed from the first direction to the second direction, a lower part of the main surface (G3y) is supported by a roller (41) of a support portion (4) from a forward side in the conveying direction of the glass sheet (G3) conveyed in the first direction.

A method for producing ultra-thin glass sheets is provided that results in glass sheets with high edge strength. The method includes: hot forming a continuous glass ribbon with a glass thickness from molten glass; annealing the glass ribbon with an annealing rate chosen based on the glass thickness; producing a laser beam focus area that is longer than the glass thickness; introducing filamentary defects into the glass ribbon using the laser beam so that the filamentary defects extend from one face to the opposite face and are spaced apart from one another along the breaking lines to produce transverse breaking lines and longitudinal breaking lines with margins each comprising a thickened bead; separating the beads along the longitudinal breaking lines and separating glass sheets by severing along the transverse breaking lines.

A method for breaking out a sheet of glass includes tracing a score line on a first face of the sheet of glass, the score line delimiting an exterior part and an interior part of the sheet of glass, positioning a support facing the score line on the side of the sheet of glass opposite to the first face, and breaking out by simultaneous application of at least a first force on the exterior part of the sheet of glass and of at least a second force on the interior part of the sheet of glass.