US 11,906,483 B2
Apparatus and method for testing edge strength of sheet of material having detection mechanism for optically measuring strain in sheet
Gabriel Pierce Agnello, Corning, NY (US); Chong Pyung An, Painted Post, NY (US); Zhenxing Hu, Painted Post, NY (US); Bosun Jang, Painted Post, NY (US); Peter Knowles, Elmira, NY (US); Balamurugan Meenakshi Sundaram, Painted Post, NY (US); Douglas Miles Noni, Jr., Horseheads, NY (US); Richard Sean Priestley, Painted Post, NY (US); and Jamie Todd Westbrook, Sayre, PA (US)
Assigned to Corning Incorporated, Corning, NY (US)
Appl. No. 17/285,587
Filed by CORNING INCORPORATED, Corning, NY (US)
PCT Filed May 6, 2020, PCT No. PCT/US2020/031553
§ 371(c)(1), (2) Date Apr. 15, 2021,
PCT Pub. No. WO2020/231683, PCT Pub. Date Nov. 19, 2020.
Claims priority of provisional application 62/959,559, filed on Jan. 10, 2020.
Claims priority of provisional application 62/852,677, filed on May 24, 2019.
Claims priority of provisional application 62/848,091, filed on May 15, 2019.
Prior Publication US 2022/0057309 A1, Feb. 24, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. G01N 3/20 (2006.01); G01N 3/06 (2006.01)
CPC G01N 3/20 (2013.01) [G01N 3/068 (2013.01); G01N 2203/0023 (2013.01); G01N 2203/0282 (2013.01); G01N 2203/0647 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An apparatus for testing edge strength of a sheet of material comprising:
a plurality of assemblies configured for selectively applying a 3-point bending load along an edge of the sheet of material in a test region of the apparatus, whereby the plurality of assemblies can establish a loaded condition on the sheet of material in the test region by applying the 3-point bending load and establish a no-load condition on the sheet of material in the test region by not applying the 3-point bending load;
a detection mechanism configured for optically measuring strain in the sheet of material in the test region when the sheet of material is in the no-load condition and when the sheet of material is in the loaded condition, wherein the strain in the loaded condition is produced by the 3-point bending load; and
a processor that is configured for determining stress in the sheet of material based on the measured strain,
wherein a pattern provided on a surface of the sheet in the test region facilitates optically measuring the strain in the sheet of material.