EP 1670288 A1 20060614 - TUBE AND BALL
Title (en)
TUBE AND BALL
Title (de)
RÖHRE UND KUGEL
Title (fr)
TUBE A EXTREMITES SPHERIQUES
Publication
Application
Priority
- JP 2004014697 W 20040929
- JP 2003341782 A 20030930
Abstract (en)
A bulb includes: a heating tube 2 having a heating portion accommodating a filament 3, a pair of sealing end portions 5b subjected to pinch sealing on both axial sides of the heating portion to provide airtight sealing, and a pair of lead wires connected to the filament and extending outward in an airtight manner from the pair of sealing end portions 5b; an optical film 10 formed by coating an optical film solution to a portion of an outer surface of the heating tube excluding a non-coating region 9 to which the optical film solution is not coated, the non-coating region 9 extending, from a position S spaced apart by a predetermined distance 1 to the filament side from an inner end ie of one of the pair of sealing end portions, to an outer end Oe of the one sealing end portion; and a frosted portion 11 formed by performing frosting treatment on the non-coating region. According to the this structure, the anti-glare effect of the heating tube can be improved.
IPC 1-7
IPC 8 full level
H05B 3/44 (2006.01); H01K 1/32 (2006.01); H01K 5/02 (2006.01); H01K 7/00 (2006.01)
CPC (source: EP)
H01K 1/32 (2013.01); H01K 7/00 (2013.01); H05B 3/44 (2013.01)
Designated contracting state (EPC)
FR IT
DOCDB simple family (publication)
EP 1670288 A1 20060614; EP 1670288 A4 20080723; JP 2005108685 A 20050421; WO 2005032215 A1 20050407
DOCDB simple family (application)
EP 04773622 A 20040929; JP 2003341782 A 20030930; JP 2004014697 W 20040929