A method and apparatus for cutting a glass laminate. A trench line is formed in a glass substrate that is an uppermost layer of a glass laminate by scoring a surface of the glass substrate. The glass laminate is cut in the direction parallel to the trench line. It is possible to prevent the propagation of cracks commonly formed during the cutting of glass laminates.

A method and apparatus for cutting a glass laminate. A trench line is formed in a glass substrate that is an uppermost layer of a glass laminate by scoring a surface of the glass substrate. The glass laminate is cut in the direction parallel to the trench line. It is possible to prevent the propagation of cracks commonly formed during the cutting of glass laminates.

A device for cutting a plate of a pre-determined thickness, preferably a glass plate, includes a frame; a support device for a cutting utensil, which is connected to the frame and adapted to have and upward and downward movement; and a hinged lever system, which has a feeler element and is kinematically coupable with the support device to bind it in a pre-determined initial position with respect to the frame. When the feeler element is pressed against a surface, the hinged lever system causes the support device with the cutting utensil to move downward from an initial position.

A device for cutting a plate of a pre-determined thickness, preferably a glass plate, includes a frame; a support device for a cutting utensil, which is connected to the frame and adapted to have and upward and downward movement; and a hinged lever system, which has a feeler element and is kinematically coupable with the support device to bind it in a pre-determined initial position with respect to the frame. When the feeler element is pressed against a surface, the hinged lever system causes the support device with the cutting utensil to move downward from an initial position.

The installation for producing a useful part from a glass pane by processing steps of cutting, breaking and grinding, includes cutting, breaking, and grinding tools, each with an associated device, and also a measuring device for generating measurement signals including a first measured variable and one of a second through fifth measured variable, and a control device with which the measurement signals can be received to form measurement data from the measured variables. The respective measured variable can be detected during the execution of one of the processing steps or specifies a process parameter of a component of the device or defines a state parameter of part of the glass pane. The control device forms correction signals from the measurement data, with which correction signals one of the devices can be controlled in an adapted manner during processing of the glass pane or of a subsequent one.

A bend-breaking system, after a cutter wheel forms an end cutting line at an edge portion of a glass plate, the cutter wheel is raised by a holder raising/lowering mechanism. A first pressing member is lowered by the first pressing member raising/lowering mechanism to sandwich a main body portion and the edge portion of the glass plate between the first pressing member and the first and second support members. A second support member is lowered by the second support member raising/lowering mechanism, and the second pressing member is lowered by the second pressing member raising/lowering mechanism to press the edge portion of the glass plate extending to an outer side of a contour cutting line downward while maintain the sandwiching of the main body portion and bend-breaks the edge portion. The bend-breaking system smoothly and reliably bend-breaks an edge portion of a glass plate to be processed in bend-breaking processing.

A bend-breaking system, after a cutter wheel forms an end cutting line at an edge portion of a glass plate, the cutter wheel is raised by a holder raising/lowering mechanism. A first pressing member is lowered by the first pressing member raising/lowering mechanism to sandwich a main body portion and the edge portion of the glass plate between the first pressing member and the first and second support members. A second support member is lowered by the second support member raising/lowering mechanism, and the second pressing member is lowered by the second pressing member raising/lowering mechanism to press the edge portion of the glass plate extending to an outer side of a contour cutting line downward while maintain the sandwiching of the main body portion and bend-breaks the edge portion. The bend-breaking system smoothly and reliably bend-breaks an edge portion of a glass plate to be processed in bend-breaking processing.

A glass-plate working apparatus 1 includes: a scribe line forming device 5, glass-plate bend-breaking devices 15A and 15B, glass-plate peripheral edge grinding devices 19A and 19B, and a glass-plate transporting device 20 for carrying in and carrying out two glass plates 2 at a time with respect to each of the scribe line forming device 5, the glass-plate bend-breaking devices 15A and 15B, and the glass-plate peripheral edge grinding devices 19A and 19B, and X-Y coordinate system controlled movement of the glass-plate peripheral edge grinding devices 19A and 19B in simultaneous grinding of peripheral edges of the glass plates 2 is adapted to be effected independently of each other.

A glass-plate working apparatus 1 includes: a scribe line forming device 5, glass-plate bend-breaking devices 15A and 15B, glass-plate peripheral edge grinding devices 19A and 19B, and a glass-plate transporting device 20 for carrying in and carrying out two glass plates 2 at a time with respect to each of the scribe line forming device 5, the glass-plate bend-breaking devices 15A and 15B, and the glass-plate peripheral edge grinding devices 19A and 19B, and X-Y coordinate system controlled movement of the glass-plate peripheral edge grinding devices 19A and 19B in simultaneous grinding of peripheral edges of the glass plates 2 is adapted to be effected independently of each other.

A method and apparatus for scoring thin glass for the purpose of score and break separation as well as an accordingly prepared scored thin glass are provided. The scoring tool is pressed onto the thin glass and drawn along the scoring line with an adjusted scoring contact pressure force as a vertical scoring force component. This permits to production of prescored ultrathin glass of Knoop hardness from 350 to 650 with a score depth from 1/20 to of the material thickness.