Method of coating photoflash lamp

Details Method of coating photoflash lamp Method of coating photoflash lamp

1974-06-24

1976-05-25

Smith, Ronald H.

Coating processes

Solid particles or fibers applied

Fluidized bed utilized

118DIG5, 118505, 427195, 431 94, B05D 124, B05D 302

Patent

active

039595250

ABSTRACT:
A method of coating the glass envelope of a photoflash lamp with a thermoplastic material, the method comprising: preheating the glass envelope at a predetermined temperature for approximately one minute; immersing the heated envelope into a fluidized bed of powdered thermoplastic material from 1 to 5 seconds; removing the coated lamp from the fluidized bed; and postheating the coated envelope at a predetermined temperature for about 1 minute. To assist in preventing inadvertent flashing during these steps, the lamp can be held by a heat sink structure gripping the ignition leads or primer tube.

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patent: 3507251 (1970-04-01), Thayer et al.
patent: 3738559 (1973-06-01), Tyndale
patent: 3756852 (1973-09-01), Scheetz et al.
patent: 3770366 (1973-11-01), Audesse et al.
patent: 3827850 (1974-08-01), Shaffer et al.
patent: 3832125 (1974-08-01), McDonough

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