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US 9,517,961 B2Granted
Glass ribbon and method for producing the same
AssigneeNippon Electric Glass Co., Ltd.
InventorsMasanori Wada, Sotohiro Nakajima
Life of this patent
Estimating the term…
Abstract
A glass ribbon has a thickness of 100 μm or less and includes a convex curved surface portion on a side surface. The glass ribbon can be produced by heating a preform glass material having a thickness of 2 mm or less, and subjecting the preform glass material to drawing so that the preform glass material has a thickness of 100 μm or less.
Claims10
A method of producing a glass ribbon, comprising the steps of:
- preparing a glass preform having a thickness of 2 mm or less;
- heating the glass preform;
- and
- drawing the heated glass preform to form a glass ribbon, while winding the glass ribbon directly on a bobbin or winding drum without contacting any tension rollers, wherein a predetermined tension is applied to the glass ribbon during the drawing by adjusting a winding speed of the bobbin or winding drum so that the glass ribbon comprises side surfaces, and wherein the bobbin or winding drum has flanges at both ends thereof, and a distance between the flanges in an axial direction of the bobbin or winding drum is compatible with a width of the glass ribbon to guide the side surfaces of the glass ribbon.
1 more element
A method of producing a glass ribbon, comprising the steps of:
- preparing a glass preform having a thickness of 2 mm or less;
- heating the glass preform;
- and
- subjecting the glass preform to a down-drawing to form a glass ribbon while winding the glass ribbon directly on a bobbin or winding drum without contacting any tension rollers, wherein a predetermined tension is applied to the glass ribbon during the down-drawing by adjusting a winding speed of the bobbin or winding drum so that the glass ribbon has a thickness of 100 μm or less and comprises side surfaces, wherein the side surfaces are entirely fire-polished convex curved surfaces, and wherein the bobbin or winding drum has flanges at both ends thereof, and a distance between the flanges in an axial direction of the bobbin or winding drum is compatible with a width of the glass ribbon to guide the side surfaces of the glass ribbon.
1 more element
Dependencies are inferred from the claim text.