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AssigneeCorning Incorporated
InventorsDana Craig Bookbinder, Jeffrey John Domey, Matthew Wade Fenton, David Lee Weidman
Estimating the term…
The invention relates to glass articles suitable for use as writeable erasable marker boards. More particularly, disclosed is a strengthened glass article suitable for use as a writeable erasable marker boards, wherein the glass sheet exhibits an ion exchanged glass having a front surface and a back surface and exhibiting a thickness of less than 2.0 mm and having a depth of layer (DOL) greater than 20 microns and a surface compressive strength of at least 300 MPa. The strengthened glass article exhibits certain optical properties which render it particularly suitable for use as a writeable erasable marker boards electronic including: (1) shadow parallax of less than 1.73/n measured at 60 degree incident light angle and for an index of refraction n; and, (2) a haze of less than 50%. Further disclosed is a markerboard with improved magnetic force attributes; sufficient to hold weak magnets in place.
A writeable erasable marker boards comprising a strengthened glass sheet having a front surface and a back surface wherein the glass sheet exhibits a thickness of less than 2.0 mm, shadow parallax of less than or equal to 1.73/n when measured at a 60 degree incident light angle and for an index of refraction of n, and a transmitted haze of less than 50%.
Dependencies are inferred from the claim text.