Patent ID: 7892060
Filing Date: 2011-02-22
Classification: H01J

Abstract:
1. A method of forming a quartz glass lamp containing electrodes within a tube of quartz glass, the method comprising: (a) surrounding the electrodes or an electrical feed through of the electrodes with a bead of sealing glass; (b) inserting the electrode or the electrical feed through of the electrode into an annulus of the quartz glass tube, thereby directly contacting the bead of sealing glass to the quartz glass tube; (c) heating the quartz glass tube and bead of sealing glass to allow the bead of sealing glass to wet on and fuse with the quartz glass tube; and (d) applying, while the bead of sealing glass is molten, a positive pressure within the quartz glass tube to form a smooth internal radius of the bead of sealing glass between the electrode or the electrical feed through and the quartz glass tube.