Annealing apparatus and method for float glass
AssigneeLG Chem, Ltd.
InventorsWoo-Hyun KIM, Sang-Oeb NA, Yang-Han KIM, Kil-Ho KIM, Heui-Joon PARK, Jin HAN, Dong-Shin SHIN
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Abstract
An annealing apparatus for a float glass continuously anneals a glass ribbon molded in a float bath. The annealing apparatus includes a lehr housing having an inlet and an outlet for the glass ribbon, a plurality of lehr rolls rotatably installed to the lehr housing in a width direction of the lehr housing, and labyrinth seals installed between the lehr rolls and sidewalls of the lehr housing, respectively, to prevent sulfurous acid gas supplied into the lehr housing from discharging out.
Claims8
1-6. (canceled)
A method of annealing a glass ribbon molded in a float bath, comprising the steps of:
- providing a lehr housing which comprises an inlet and an outlet for the glass ribbon;
- rotatably installing a plurality of lehr rollers, each of which has a rotary shaft, to both side walls of the lehr housing in a width direction such that two ends of the rotary shaft are outwardly protruded in a predetermined length through the side walls;
- installing labyrinth seals around the two ends of the each rotary shaft outside of the side walls, thereby sealing gaps between the lehr housing and the lehr rollers;
- continuously introducing the glass ribbon into the inlet of the lehr housing;
- and
- supplying sulfurous acid gas into the lehr housing, thereby reducing a friction between a bottom of the glass ribbon and the lehr rollers and a defect occurring at a surface of the glass ribbon while preventing the sulfurous acid gas from being discharging out of the lehr housing by using the labyrinth seals.
Dependencies are inferred from the claim text.