Eugene A Castello

US Patent:

39595250, May 25, 1976

Filed:

Jun 24, 1974

Appl. No.:

5/482038

Inventors:

Thomas J. Sentementes - Wakefield MA
Eugene A. Castello - North Reading MA
Richard Coppola - Beverly MA

Assignee:

GTE Sylvania Incorporated - Danvers MA

International Classification:

B05D 124
B05D 302

US Classification:

427185

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.