1
Grove Robert H, De Torre Robert P, Dahlberg John R: Method of and an apparatus for cutting glass. PPG, Shanahan Thomas F, April 2, 1974: US3800991 (35 worldwide citation)

Pieces of flat glass are cut to desired size without the necessity of grinding to size and polishing. Trims are removed from the piece in accordance with a procedure involving the creation of a subsurface discontinuity along an intended path of cut, followed by the application of surface heat along ...


2
Dahlberg John R, Dear Terrence A: Method for cutting curved patterns in glass sheets disposed on a fluid air support. PPG, June 19, 1973: US3740524 (10 worldwide citation)

A pattern-cutting apparatus for glass comprising an air-support table periodically supplied with compressed air for supporting the glass above the table, a source of thermal energy disposed above and below the glass sheet for inducing a fracture in the glass, and a motor and turning mechanism for tu ...


3
Dahlberg John R, Oravitz James L, Michalik Edmund R: Directional control for thermal severing of glass. PPG, Shanahan Thomas F, February 5, 1974: US3790362 (7 worldwide citation)

This invention relates to non-contact thermal severing of glass and includes methods and apparatus for altering at least some of the radiation from a thermal source so that a temperature profile that would ordinarily otherwise tend to be asymmetrical becomes symmetrical about an intended path of cut ...


4
Dahlberg John R, Grove Robert H: Method for trimming glass. PPG, Millman Dennis G, November 25, 1975: US3921873 (5 worldwide citation)

Method for improving the edge quality of bulb edge trim cuts wherein a band of the glass parallel to a bulb edge is heated during the cutting operation so as to reduce compressive forces in the bulb portion.


5
Dahlberg John R, Oravitz James L, Michalik Edmund R: Thermally directed glass cutting. PPG, Shanahan Thomas F, February 19, 1974: US3792989 (4 worldwide citation)

This invention relates to a method and apparatus for cutting glass wherein glass is thermally scored along an intended path of cut, using a non-radiant, surface heating means. A fracture is then directed along the intended path by applying a bending moment about the thermal score.


6
Dahlberg John R, Oravitz Jr James L, Michalik Edmund R: Thermally directed glass cutting. PPG, May 1, 1973: US3730408 (3 worldwide citation)

This invention relates to a method and apparatus for cutting glass wherein glass is thermally scored along an intended path of cut, using a non-radiant, surface heating means. A fracture is then directed along the intended path by applying a bending moment about the thermal score.


7
Dahlberg John R, Oravitz Jr James L, Michalik Edmund R: Directional control for thermal severing of glass. PPG, Shanahan Thomas F, Millman Dennis G, February 5, 1974: US3790054 (2 worldwide citation)

This invention relates to non-contact thermal severing of glass and includes methods and apparatus for altering at least some of the radiation from a thermal source so that a temperature profile that would ordinarily otherwise tend to be asymmetrical becomes symmetrical about an intended path of cut ...


8
Dahlberg John R, Oravitz Jr James L, Michalik Edmund R: Directional control for thermal severing of glass. PPG, January 9, 1973: US3709414 (1 worldwide citation)

This invention relates to non-contact thermal severing of glass and includes methods and apparatus for altering at least some of the radiation from a thermal source so that a temperature profile that would ordinarily otherwise tend to be asymmetrical becomes symmetrical about an intended path of cut ...


9

10