1
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 ...


2
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 ...


3
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 ...


4