Color cathode ray tube having a detensioning mask frame...

Electric lamp and discharge devices – Cathode ray tube – Shadow mask – support or shield

Reexamination Certificate

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Details

C313S402000

Reexamination Certificate

active

09900369

ABSTRACT:
A cathode ray tube includes a tension mask attached to a rectangular mask frame assembly that has two long sides paralleling a central major axis thereof and two short sides paralleling a central minor axis thereof. The two long sides are disposed at generally a right angle with respect to the two short sides with each of the sides connected to form a continuous generally planar support frame having an inner and outer peripheral surface. The support frame is formed of a material having a first coefficient of thermal expansion and includes a detensioning member formed of a second coefficient of thermal expansion on the peripheral surface of at least one side of the frame to facilitate detensioning of the mask.

REFERENCES:
patent: 4866334 (1989-09-01), Fendley et al.
patent: 5111107 (1992-05-01), Kume et al.
patent: 5932957 (1999-08-01), Ragland, Jr.
patent: 6046534 (2000-04-01), Horiuchi
patent: 6686684 (2004-02-01), Van Der Wilk
patent: 0393488 (1990-10-01), None
patent: 1069592 (2001-01-01), None
patent: WO 00/11701 (2000-03-01), None
patent: WO 01/48784 (2001-07-01), None

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