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US 8,211,505 B2Granted
High-strength laminated sheet for optical applications
AssigneeCorning Incorporated
InventorsPeter L. Bocko, David Chen, Glen B. Cook, Frank T. Coppola, Victoria A. Edwards, Gunilla E. Gillberg, Josef C. Lapp, Randy L. Rhoads, David A. Tammaro, Butchi R. Vaddi
Life of this patent
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Abstract
A laminated sheet includes a surface layer having an optical surface that is of fire-polished quality and a core layer having a higher modulus than the surface layer to increase an overall stiffness or fracture toughness of the laminated sheet.
Claims8
A method of making a laminated sheet, comprising:
- adding a first surface layer to a previously prepared core layer, the previously prepared core layer comprising a glass material or a foam material that can be expanded, the first surface layer being added by a fusion process comprising:
- supplying a first viscous, flowable material to a first overflow channel of a first single-sided overflow fusion pipe;
- overflowing the first viscous, flowable material in a controlled manner to form a first sheet-like flow with an untouched surface of fire-polished quality and a touched surface;
- and
- while the first sheet-like flow is in viscous, flowable form, merging the touched surface of the first sheet-like flow with a first surface of the previously prepared core layer.
2 more elements
A method of making a laminated sheet, comprising:
- adding a first surface layer to a previously prepared core layer, wherein the previously prepared core layer comprises an annealed glass, the first layer being added by a fusion process comprising:
- supplying a first viscous, flowable material to a first overflow channel of a first single-sided overflow fusion pipe;
- overflowing the first viscous, flowable material in a controlled manner to form a first sheet-like flow with an untouched surface of fire-polished quality and a touched surface;
- and
- while the first sheet-like flow is in viscous, flowable form, merging the touched surface of the first sheet-like flow with a first surface of the previously prepared core layer.
2 more elements
A method of making a laminated sheet, comprising:
- adding a first surface layer to a previously prepared core layer, wherein the previously prepared core layer comprises a glass-ceramic, the first layer being added by a fusion process comprising:
- supplying a first viscous, flowable material to a first overflow channel of a first single-sided overflow fusion pipe;
- overflowing the first viscous, flowable material in a controlled manner to form a first sheet-like flow with an untouched surface of fire-polished quality and a touched surface;
- and
- while the first sheet-like flow is in viscous, flowable form, merging the touched surface of the first sheet-like flow with a first surface of the previously prepared core layer.
2 more elements
Dependencies are inferred from the claim text.