Method for introducing mercury into a fluorescent lamp...

Electric lamp or space discharge component or device manufacturi – Process – Including evacuating – degasifying or getter or fluent...

Reexamination Certificate

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Details

C445S009000, C445S042000, C445S043000, C445S056000, C445S058000, C313S550000, C313S565000

Reexamination Certificate

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06913504

ABSTRACT:
Method for introducing a limited amount of mercury into a fluorescent lamp during manufacture thereof includes the steps of forming the lamp with an exhaust tubulation therein open at an end thereof, exhausting the interior of the lamp through the exhaust tubulation, placing a body of metal material not reactive with mercury in the exhaust tubulation open end, the body having a coating of metal which amalgams with mercury, over a selected surface area of the body, and having mercury on the coated area of the body, such that a limited amount of the mercury is retained by the metal coating, and sealing the open end of the exhaust tubulation, whereby the amount of mercury retained on the body and introduced into the lamp is limited by the surface area of the metal coating on the body.

REFERENCES:
patent: 4035682 (1977-07-01), Bubar
patent: 4090050 (1978-05-01), Siiberg
patent: 4393325 (1983-07-01), van der Kooi
patent: 4528209 (1985-07-01), Anderson et al.
patent: 4972118 (1990-11-01), Yorifuji et al.
patent: 5434482 (1995-07-01), Borowiec et al.
patent: 5629584 (1997-05-01), Borowiec et al.
patent: 5757129 (1998-05-01), Schafnitzel et al.
patent: 5767617 (1998-06-01), Wharmby et al.
patent: 5994837 (1999-11-01), Willems et al.
patent: 6097137 (2000-08-01), Forsdyke et al.

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