Patent ID: 7465209

Claim:
In a method of manufacturing a flash-free lamp base, wherein said lamp base comprises a shell, an eyelet and a glass, electrically insulating part therebetween and joining said shell and said eyelet, said shell and said eyelet being electrically conductive, said shell having a tubular portion with an open end and a partially closed end defining a volume therebetween, said partially closed end including a tapered area terminating in a reentrant section that extends into said volume and defines an inner annulus, the steps comprising: positioning said shell and said eyelet at a workstation in spaced, axial alignment with one another defining a gap therebetween; actuating a first forming tool through said tubular portion and into engagement with said tapered area and said inner annulus; dispensing a quantity of molten glass into said gap; and actuating a second forming tool within said first forming tool to form said molten glass into an electrically insulating part between said shell and said eyelet.