US 12,356,511 B2
Heater for melting glass
Terutaka Maehara, Tokyo (JP); Akifumi Niwa, Tokyo (JP); Shuntaro Hyodo, Tokyo (JP); Yukihito Akita, Tokyo (JP); Takashi Enomoto, Tokyo (JP); Yoji Doi, Tokyo (JP); Roger Pauli, Stourbridge (GB); and Lawrence Keen, Stourbridge (GB)
Assigned to AGC INC., Tokyo (JP)
Filed by AGC Inc., Tokyo (JP)
Filed on Jun. 14, 2022, as Appl. No. 17/840,263.
Application 17/840,263 is a continuation of application No. PCT/JP2020/046033, filed on Dec. 10, 2020.
Claims priority of application No. 2019-230938 (JP), filed on Dec. 20, 2019.
Prior Publication US 2022/0312554 A1, Sep. 29, 2022
Int. Cl. C03B 5/033 (2006.01); F27D 11/02 (2006.01); H05B 3/14 (2006.01); H05B 3/40 (2006.01)
CPC H05B 3/145 (2013.01) [C03B 5/033 (2013.01); F27D 11/02 (2013.01); H05B 3/40 (2013.01); H05B 2203/025 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A heater for melting glass, comprising:
a heating member containing carbon (C) configured to emit heat rays upon power feeding; and
a tubular member made of metal configured to have one end closed, and to house the heating member,
wherein the heating member includes a first heat generating part and a second heat generating part along an extending axis direction of the heater, and the first heat generating part is arranged at a position closer to the one end of the tubular member than is the second heat generating part, and
wherein the first heat generating part has a unit-length resistance along the extending axis direction defined by X (Ω/m), the second heat generating part has a unit-length resistance along the extending direction defined by Y (Ω/m), and the unit-length resistances X and Y of the heating member satisfy Formula (1):
( 1/30)X<Y<(½)X.