Coating processes – Electrical product produced – Fluorescent or phosphorescent base coating
Patent
1990-10-12
1992-04-14
Bell, Janyce
Coating processes
Electrical product produced
Fluorescent or phosphorescent base coating
427 72, 427231, 427232, 427233, 427240, 427425, 118317, 118318, 118321, B05D 512, B05B 1306
Patent
active
051046865
ABSTRACT:
Apparatus for applying a conductive coating of DAG material to the inner surface of a cathode ray tube (CRT) funnel includes a stationary DAG spray gun and a movable DAG rotating slinger. The CRT funnel is rotated to allow the stationary spray gun to deposit a first DAG coating on an intermediate flared portion of the inner surface of the funnel, including the location of its anode button. The DAG slinger, which includes a rotating disc for radially discharging the DAG, is then displaced through the neck portion of the CRT funnel toward the open, enlarged end of the funnel to deposit a second DAG coating which overlaps the first DAG coating. The apparatus includes a variable DAG flow control arrangement for depositing a DAG coating of uniform thickness over the inner surface of the CRT funnel, as well as a DAG cleaning and recovery arrangement for preventing DAG not deposited on the CRT funnel from escaping to the environment and for recovering this DAG for re-use.
REFERENCES:
patent: 2619430 (1952-11-01), Fink
patent: 2763564 (1956-09-01), McKenzie et al.
patent: 3791846 (1974-02-01), Nuehring
patent: 4125088 (1978-11-01), Hong et al.
Bell Janyce
Zenith Electronics Corporation
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