Method for producing a frosted envelope for a high-pressure...

Details Method for producing a frosted envelope for a high-pressure... Method for producing a frosted envelope for a high-pressure...

2008-07-08

2008-07-08

Roy, Sikha (Department: 2879)

Electric lamp or space discharge component or device manufacturi

Process

With assembly or disassembly

C445S009000, C445S058000, C313S634000, C313S318020

Reexamination Certificate

active

11049986

ABSTRACT:
A high-pressure discharge lamp, in particular a mercury-free high-pressure discharge lamp for a vehicle headlight, has a lamp base (1) and an axially symmetrical discharge vessel (30), in whose discharge space (300) an ionizable filling, containing metal halides, and electrodes (31, 32) are arranged for producing a gas discharge. The discharge vessel (30) is provided with transparent, partial frosting (37), which is limited to a section of the inside or outside of the discharge vessel (30) extending over part of the discharge vessel circumference, this section having a well-defined position with respect to the lamp base (1). Moreover, a simple production method is proposed for partial frosting (37) which is preferably arranged on the inside of the discharge vessel (30).

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patent: 198 34 401 (2000-02-01), None

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