Patent ID: 11906482
Assignee: CORNING INCORPORATED
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 11:
12. 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;
wherein the plurality of assemblies comprises two opposing assemblies for applying the 3-point bending load, wherein a first of the two opposing assemblies comprises a single arcuate member for engaging a first side of the sheet and a second of the two opposing assemblies comprises two spaced-apart arcuate members for engaging a second side of the sheet opposite the first side, wherein the two spaced-apart arcuate members are separated by a predefined spacing, wherein the two spaced-apart arcuate members define the test region between the two spaced-apart arcuate members;
wherein the single arcuate member is vertically aligned between the two spaced-apart arcuate members;
wherein the two spaced-apart arcuate members are configured to dynamically adjust the predefined spacing between the two spaced-apart arcuate members to adjust the stress induced in the sheet in the test region while maintaining the vertical alignment of the single arcuate member with respect to the two spaced-apart arcuate member.