Method of producing light emitting tube and core used therefor
AssigneeMatsushita Electric Industrial Co., Ltd.
InventorYasutaka Horibe
Life of this patent
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Abstract
To form an arc tube body including a main tube portion to be a discharge space and thin tube portions for accommodating electrodes, a core (6) is disposed in a hollow space formed by a pair of arc tube body formation molds (7) and (8) and thereafter, a slurry (12) is injected into a space between the molds (7), (8) and the core (6). In the core (6), portions for forming the internal shape of the thin tube portions of the arc tube body are provided with a shaft (3).
Claims16
A method for manufacturing an arc tube body, which comprises a main tube portion to be a discharge space and thin tube portions for accommodating electrodes, using a pair of molds and a material to be injected thereinto, comprising at least:
- disposing a core in a hollow space formed by the molds before injecting the material, the core comprising portions for forming an internal shape of the thin tube portions, a portion for forming an internal shape of the main tube portion, and a shaft disposed in the portions for forming an internal shape of the thin tube portions.
A core used for manufacturing an arc tube body, which comprises a main tube portion to be a discharge space and thin tube portions for accommodating electrodes, using a pair of molds and a material to be injected thereinto, the core being disposed in a hollow space formed by the pair of molds before injecting the material, comprising:
- portions for forming an internal shape of the thin tube portions;
- a portion for forming an internal shape of the main tube portion;
- and
- a shaft disposed in the portions for forming an internal shape of the thin tube portion.
Dependencies are inferred from the claim text.