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Patent Searching and Data


Title:
METHOD FOR FINISHING HIGH-VISCOSITY GLASS BASE
Document Type and Number:
Japanese Patent JPH04317424
Kind Code:
A
Abstract:

PURPOSE: To reduce the consumption of a furnace material and to finish the base of a high-viscosity glass by rapidly melting the high-viscosity glass close to the throat and the bottom wall of a melting tank.

CONSTITUTION: At least a couple of electrodes 4 and 4' are vertically inserted away from the lower part of the bottom wall of a throat 2, the inner wall of the throat is covered with a high-viscosity glass material layer, and a low- viscosity glass material layer 7 is laminated on the high-viscosity material layer. As the melting furnace is heated, the low-viscosity glass material layer is melted, and the high-viscosity glass material layer 8 is melted by the AC voltage impressed between the electrodes. A cullet is then successively charged from the molten layer side to finish the base.


Inventors:
KOYAMA AKIHIRO
Application Number:
JP10680791A
Publication Date:
November 09, 1992
Filing Date:
April 11, 1991
Export Citation:
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Assignee:
NIPPON SHEET GLASS CO LTD
International Classes:
C03B5/027; C03B5/16; C03B5/167; C03B5/425; (IPC1-7): C03B5/027; C03B5/16
Attorney, Agent or Firm:
Ohno Seiichi