Electric lamp and discharge devices – Cathode ray tube – Shadow mask – support or shield
Reexamination Certificate
2007-04-10
2007-04-10
Patel, Vip (Department: 2879)
Electric lamp and discharge devices
Cathode ray tube
Shadow mask, support or shield
C313S479000
Reexamination Certificate
active
10476403
ABSTRACT:
A steel sheet for an inner magnetic shield has a ratio of the anhysteretic magnetic permeability in the rolling direction to the anhysteretic magnetic permeability in the transversal direction, which is not higher than 0.7 or not lower than 1.4, preferably not higher than 0.5 or not lower than 2.0. A higher value of the two anhysteretic magnetic permeability values in the rolling direction and in the transversal direction is not lower than 18000. The inner magnetic shield formed of the particular steel sheet has a substantially truncated pyramid body which has a pair of short side members of a screen and a pair of long side members of a screen. The short side members are joined to the long side members at edge portions of the truncated pyramidal inner magnetic shield. The direction, in which the anhysteretic magnetic permeability of the steel sheet is the higher value, corresponds to the horizontal plane direction of the short side member. In addition, the direction, in which the anhysteretic magnetic permeability of the steel sheet is the higher value, corresponds to as required to the horizontal plane direction of the long side member.
REFERENCES:
patent: 1 126 041 (2001-08-01), None
patent: 10-168551 (1998-06-01), None
patent: 2000-160252 (2000-06-01), None
patent: 2000-169945 (2000-06-01), None
patent: 2001-240946 (2001-09-01), None
patent: 2001-316768 (2001-11-01), None
patent: 2001-316777 (2001-11-01), None
patent: 2005060785 (2005-03-01), None
patent: WO 01/12863 (2001-02-01), None
I. Saitoh, “Magnetic Characteristics of Magnetic Shield in CRT and Their Effects on Landing Drifts Caused by Terrestrial Magnetic Field”, Transaction of the Institute of Electronics, Information, and Engineers, vol. J79-C-II, No. 6, pp. 311-319 (Jun. 1996).
Fukumizu Keisuke
Kato Hiroaki
Kubo Noriko
Matsuoka Hideki
Sugihara Reiko
Frishauf Holtz Goodman & Chick P.C.
JFE Steel Corporation
Patel Vip
LandOfFree
Steel sheet for inner magnetic shield and method of... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Steel sheet for inner magnetic shield and method of..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Steel sheet for inner magnetic shield and method of... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3758036