METHOD OF MANUFACTURING LAMP AND QUARTZ BULB

Title:

METHOD OF MANUFACTURING LAMP AND QUARTZ BULB

Document Type and Number:

WIPO Patent Application WO/2010/064308

Kind Code:

A1

Abstract:

An electrode end is accurately positioned so that the arc length is constant, and when electrode mounts are sealed by heating a sealing part, a leakage caused by bending and twisting of a molybdenum foil is prevented from occurring at the sealed part. A quartz bulb (10) has openings at opposite ends of a body pipe (11) where a light emission part and sealing parts are formed, and the quartz bulb (10) also has a positioning step (15) formed by fusion bonding extension pipes (14A, 14B) to the openings. The extension pipes (14A, 14B) have an internal diameter greater than the internal diameter of the openings. The electrode mounts (20A, 20B) having a positioning engagement part (24) located at a position a predetermined distance away from the electrode end is inserted into the quartz bulb, and sealing parts (13A, 13B) are sealed with the positioning engagement part (24) of the electrode mounts (20A, 20B) engaged with the positioning step (15).

Inventors:

OOKAHARA MAKOTO (JP)
YAMAMOTO SHOJI (JP)

Application Number:

PCT/JP2008/071976

Publication Date:

June 10, 2010

Filing Date:

December 03, 2008

Export Citation:

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Assignee:

IWASAKI ELECTRIC CO LTD (JP)
OOKAHARA MAKOTO (JP)
YAMAMOTO SHOJI (JP)

International Classes:

H01J9/32

Foreign References:

JP2003151438A	2003-05-23
JPH08171851A	1996-07-02
JP2003346654A	2003-12-05
JPH04104427A	1992-04-06
JPH06290748A	1994-10-18
JP2000021312A	2000-01-21

Other References: