3800991 is referenced by 35 patents and cites 3 patents.

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 the discontinuity to increase tensile stresses within the piece along the intended path of cut. A bending moment is applied about the intended path of cut to propagate a fracture in the piece of glass. Light seaming of the top and bottom portions of the edges completes the preparation of the edges.

Title
Method of and an apparatus for cutting glass
Application Number
05/242,549
Publication Number
3800991
Application Date
April 10, 1972
Publication Date
April 2, 1974
Inventor
Dahlberg John R
De Torre Robert P
Grove Robert H
Agent
Shanahan Thomas F
Assignee
PPG
IPC
B26f 03/00
B26d 07/10
C03b 33/02
C03B 33/10
C03B 33/09
C03B 33/00
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